ZmnSCPxj <> 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.

>> 3.  The CLTV timeout should be symmetrical to avoid trying to game the
>>     peer into closing. (Connor IIRC?).
> I know this has been discussed before, but I wonder the rationale for the 
> original asymmetric design, and the rationale for the new symmetric design.

The original design does the minimum necessary (you *must* have a
to-yourself delay to give time for the penalty tx to work).  But, when
combined with fee asymmetry (funder pays), it can lead the fundee to not
care whether it forces the funder to perform a unilateral, or does a
graceful mutual close.

It's not a major issue, but aligning incentives (to mutual close) makes
sense if we're changing other things I think.

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