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From: ZmnSCPxj <ZmnSCPxj@protonmail.com>
To: ZmnSCPxj <ZmnSCPxj@protonmail.com>
Cc: Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>,
	lightning-dev <lightning-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] [Lightning-dev] RBF Pinning with Counterparties and Competing Interest
Date: Sun, 21 Jun 2020 02:10:32 +0000	[thread overview]
Message-ID: <v959z56ko0Nzdl9BGs-zRWIxIy9o960OfvH6bRszIC9_JI-zdtQuSb7fPD4L_VnngBp_nLMMfl_Nfd6ZLtSeZZRKhZoFO5Xxryvo6GT0zT4=@protonmail.com> (raw)
In-Reply-To: <wRX9uiX_fFrjZvlmgx3Sj64VA3DdXakJZJq2_7DHJWIS7QBlphgpaBDdm4SjdY4aij5pESsumww8iJw8QZe5mO8bPgpYFyp6eImF2xbaXR4=@protonmail.com>

Good morning again,

> Good morning Dave,
>
> > ZmnSCPxj noted that pay-to-preimage doesn't work with PTLCs.[2] I was
> > hoping one of Bitcoin's several inventive cryptographers would come
> > along and describe how someone with an adaptor signature could use that
> > information to create a pubkey that could be put into a transaction with
> > a second output that OP_RETURN included the serialized adaptor
> > signature. The pubkey would be designed to be spendable by anyone with
> > the final signature in a way that revealed the hidden value to the
> > pubkey's creator, allowing them to resolve the PTLC. But if that's
> > fundamentally not possible, I think we could advocate for making
> > pay-to-revealed-adaptor-signature possible using something like
> > OP_CHECKSIGFROMSTACK.[3]
>
> <snip>
>
> The signed message could be a signature to `SIGHASH_NONE`, finally an actual use for that flag.

If you are going to embed it in an `OP_RETURN` in the same transaction, you also need `SIGHASH_ANYPREVOUT`, otherwise you cannot embed the adaptor signature for spending from that transaction in the transaction being spent, it also implies `A[p4s] = a[p4s] * G` is a one-time-use keypair.

Regards,
ZmnSCPxj


  reply	other threads:[~2020-06-21  2:10 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-21  2:43 [bitcoin-dev] RBF Pinning with Counterparties and Competing Interest Matt Corallo
2020-04-22  4:12 ` [bitcoin-dev] [Lightning-dev] " ZmnSCPxj
2020-04-22  4:18   ` Olaoluwa Osuntokun
2020-04-22  6:08     ` ZmnSCPxj
2020-04-22  8:01       ` Antoine Riard
2020-04-22  8:55         ` Bastien TEINTURIER
2020-04-22 23:05       ` Olaoluwa Osuntokun
2020-04-22 23:11         ` Olaoluwa Osuntokun
2020-04-22 16:56   ` Matt Corallo
2020-04-22  4:13 ` [bitcoin-dev] " Olaoluwa Osuntokun
2020-04-22 11:51   ` David A. Harding
2020-04-27 21:26     ` Rusty Russell
2020-04-22 16:50   ` Matt Corallo
2020-04-22 23:13     ` Olaoluwa Osuntokun
2020-04-22 23:20       ` Matt Corallo
2020-04-22 23:27         ` Olaoluwa Osuntokun
2020-04-23  1:10           ` Matt Corallo
2020-04-23  4:50             ` [bitcoin-dev] [Lightning-dev] " ZmnSCPxj
2020-04-23  6:21               ` Matt Corallo
2020-04-23 12:46                 ` ZmnSCPxj
2020-04-23 22:47                   ` Matt Corallo
2020-06-19  7:44                     ` Bastien TEINTURIER
2020-06-19 19:58                       ` David A. Harding
2020-06-19 20:52                         ` David A. Harding
2020-06-20  8:54                           ` Bastien TEINTURIER
2020-06-20 10:36                             ` David A. Harding
2020-06-20 16:01                               ` ZmnSCPxj
2020-06-21  2:10                                 ` ZmnSCPxj [this message]
2020-06-22  7:35                               ` Bastien TEINTURIER
2020-06-22  8:15                                 ` ZmnSCPxj
2020-06-22  8:25                                   ` Bastien TEINTURIER
2020-06-24  8:32                                     ` Matt Corallo
2020-04-23  1:18           ` [bitcoin-dev] " Jeremy
2020-04-22 18:24 ` David A. Harding
2020-04-22 19:03   ` Antoine Riard
2020-04-22 20:28     ` David A. Harding
2020-04-22 22:53 Matt Corallo
2020-04-23  9:59 ` David A. Harding
2020-04-23 12:52   ` [bitcoin-dev] [Lightning-dev] " ZmnSCPxj

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