In reply to @kfatehi:matrix.org

Interesting. I checked them out but I don’t see their solution described on their site.

I believe it’s insoluble. To me it was pointless anyway to pursue a narrower threat scope in that the biggest threat is already accessing the data directly (any gov that can and does control or compel Facebook in this case) so for me sadly the logical conclusion even after having built v1 of the self hosted FB bridge here many years ago was to exit these and other such protocols. Which is why my projects are abandonware now… I’m not using any of these networks anymore - I gave up.

That said, good luck though and thanks for sharing.

Ok. You could try asking in the more general room #bridges:matrix.org

The problem comes down to the fact that FB is not an open platform so the only way to “bridge” is to masquerade as a real client and so that real client must run somewhere and so herein lies the inherent incompatibility with non-self-hosting.