On Fri, Apr 03, 2020 at 02:51:15AM +0000, ZmnSCPxj via Lightning-dev wrote: > Ah, right, E knows the revocation for the unilateral close of EE, > because it is a self-channel, sigh. And by this revocation clause it > can claim the money immediately and put it into a channel as well.
If it's a self channel, E can also just RBF replace the close transaction with a minimally-sized 1-input, 1-output transaction. In addition, if typical mempools are full and the closing transaction feerate is very low (i.e. because anchor outputs are meant to be used) E may also be able to create a close transaction that will be dropped from typical mempools in the near future and may never confirm, allowing E to continue using the channel in attacks against its other peers. -Dave
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