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From: ZmnSCPxj <ZmnSCPxj@protonmail.com>
To: Billy Tetrud <billy.tetrud@gmail.com>,
	Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Conjectures on solving the high interactivity issue in payment pools and channel factories
Date: Tue, 10 May 2022 16:45:19 +0000	[thread overview]
Message-ID: <mcikQmSFmiZw6Tq1GocybVcjGHNc-u9cP1aoZpJU-HEfgcqXXi1WhZSnEDMtEz3GfqAJGWpfZXjEBmsCXNSyLAgVNNcsSklERd-DJ8KeocE=@protonmail.com> (raw)
In-Reply-To: <CAGpPWDa2wofye=KSq-vVNS0SOU34st9wm-hMhiYzGLTKMGuP5w@mail.gmail.com>

Good morning Billy,


> Very interesting exploration. I think you're right that there are issues with the kind of partitioning you're talking about. Lightning works because all participants sign all offchain states (barring data loss). If a participant can be excluded from needing to agree to a new state, there must be an additional mechanism to ensure the relevant state for that participant isn't changed to their detriment. 
>
> To summarize my below email, the two techniques I can think for solving this problem are:
>
> A. Create sub-pools when the whole group is live that can be used by the sub- pool participants later without the whole group's involvement. The whole group is needed to change the whole group's state (eg close or open sub-pools), but sub-pool states don't need to involve the whole group.

Is this not just basically channel factories?

To reduce the disruption if any one pool participant is down, have each sub-pool have only 2 participants each.
More participants means that the probability that one of them is offline is higher, so you use the minimum number of participants in the sub-pool: 2.
This makes any arbitrary sub-pool more likely to be usable.

But a 2-participant pool is a channel.
So a large multiparticipant pool with sub-pools is just a channel factory for a bunch of channels.

I like this idea because it has good tradeoffs, so channel factories ho.

Regards,
ZmnSCPxj


  parent reply	other threads:[~2022-05-10 16:45 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-28 13:18 [bitcoin-dev] Conjectures on solving the high interactivity issue in payment pools and channel factories Antoine Riard
2022-05-01 22:53 ` Billy Tetrud
2022-05-10  0:38   ` Antoine Riard
2022-05-10 16:45   ` ZmnSCPxj [this message]
2022-05-12 17:36     ` Billy Tetrud
2023-03-17 20:54 ` jlspc
2023-04-18  3:38   ` Antoine Riard

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