[Lightning-dev] Commitment Transaction Format Update Proposals?

[Rusty Russell]

ZmnSCPxj <ZmnSCPxj at protonmail.com> writes:
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> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Friday, October 12, 2018 2:36 PM, Rusty Russell <rusty at rustcorp.com.au> wrote:
>
>> ZmnSCPxj ZmnSCPxj at protonmail.com writes:
>>
>> > Good morning Rusty and list,
>> >
>> > > 1.  Rather than trying to agree on what fees will be in the future, we
>> > >     should use an OP_TRUE-style output to allow CPFP (Roasbeef)
>> > >
>> >
>> > My understanding is that this would require some base-layer changes at Bitcoin level first? At minimum IsStandard() modification, and I believe luke-jr suggested, to make a consensus rule that OP_TRUE would not be spendable beyond the block it appears in (i.e. it is used only for CPFP hooking) to reduce UTXO database size at lower layer.
>>
>> If you look further down, it's actually a P2WSH to "OP_TRUE". Wastes
>> some space, but it works today.
>
> Ah, I see.  This will change again if the luke-jr proposal pushes through?
>
> Will robots arise which will attempt to claim as many OP_TRUE outputs as they can find, claiming them afterwards during very-low-fee periods?

I hope so!  It's our technique to avoid polluting the UTXO set.

Cheers,
Rusty.