Which explains why it doesn't exist in Amethyst. Marmot is an upgrade from Signal to make it decentralized. Signal has a feature (perfect forward secrecy). The way they work around that is linking a device from the main account, and offering to copy historical messages to the linked device. If the feature you want doesn't exist in Signal, it probably will never exist in marmot. Of course don't quote me on anything. I am barely a spectator in this space. I have just been burned by Signal's centralization so I prefer marmot.

Forward secrecy in signal is a lie exactly because you can export/import stuff or connect with a desktop app. I don't need your keys, I just need to connect my desktop to your signal app. Then puf.. all the "perfect forward secrecy" turns into theoretical BS.

I assume it copies it directly from what exists in storage on my phone. If true then your statement assumes the implemented solution assumes actual perfect forward secrecy. I mean, if it was truly perfect forward secrecy than I couldn't write the messages down on paper as I get them and share with a friend.

Sure.. I find the use of "forward secrecy" terms just marketing bullshit most actual engineers know it only exist in theory. So, to me, that is not a good sales point for Marmot. I do like the scaling of group sizes, though... But I wouldn't use it because of "forward secrecy"...