[Lightning-dev] Pay-to-Open and UX improvements

Bastien TEINTURIER bastien at acinq.fr
Tue Dec 17 16:01:01 UTC 2019


Thanks a lot David for the suggestion and pointers, that's a really
interesting solution.
I will dive into that in-depth, it could be very useful for many layer-2
constructions.

Thanks ZmnSCPxj as well for the quick feedback and the `OP_CAT`
construction,
a lot of cool tricks coming up once (if?) we have such tools in the future
;)

Le mar. 17 déc. 2019 à 16:14, ZmnSCPxj <ZmnSCPxj at protonmail.com> a écrit :

> Good morning David, t-bast, and all,
>
>
> > I'm not aware of any way to currently force single-show signatures in
> > Bitcoin, so this is pretty theoretical. Also, single-show signatures
> > add a lot of fragility to any setup and make useful features like RBF
> > fee bumping unavailable.
>
> With `OP_CAT`, we can enforce that a particular `R` is used, which allows
> to implement single-show signatures.
>
>     # Assuming signatures are the concatenation of (R,s)
>     <R> OP_SWAP OP_CAT <ACINQ> OP_CHECKSIG
>
> The above would then feed `s` only on the witness stack.
>
> Regards,
> ZmnSCPxj
>
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