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
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