LN-Symmetry Project Recap

[rustyrussell]

@instagibbs

Might be talking past each other, but the counter-party may play an old update state to which you’ve forgotten the opening of the taproot commitment to your update. You could remember O(n) fields rather than use the annex, of course.

If they play an old update, you spend it with the new update? Wasn’t that the entire trick? Obviously I’m missing something (I’m guessing some Taproot detail?)