@punkmonk correct to the last point. ssb-identities don't have any relationship between feeds (on purpose). Meta feeds is meant to be on a single computer to make it easy to split data for different purposes into multiple feeds. For that purpose you then don't need to use ssb-identities.
Awesome thanks so much for this info @cel .. helpful, also @zelf . I think in the end its probably worth the hassle to be able to switch and change wallets and ssb feeds so perhaps its ok to have to like sign a message on your feed saying this is your public eth address (and vice versa in an eth transaction of some kind ?)
But that said could be handy and fun to be able to derive a 'default' ssb feed from an eth address in a predictable way. I wonder if that woudl be a specfication of some kind - could be a very short one pager - and if so where one would publish such a thing? Perhaps as an library beginning "ssb-xxx" or something?
Also, @sean and @adria0 might have some insights 🌸
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