[Bitcoin-segwit2x] Addressing Segwit's anyone-can-spend "issue" with the hard fork?

Dr Adam Back adam at blockstream.com
Mon Jul 10 20:51:38 UTC 2017

It's not a risk factor, it's just a FAQ-level misunderstanding about
how soft-forks work.  Soft-forks are deployed on economic nodes first,
activation via flag-day, UASF or MASF is the final step.  A mined
block that is invalid according to a locked in soft-fork, is just an
invalid block.  Invalid blocks get mined from time-to-time and are
mostly unnoticed and largely not even relayed.  It's not the longest
chain, it's the most work valid-chain.


On Mon, Jul 10, 2017 at 9:06 PM, Oliver Petruzel via Bitcoin-segwit2x
<bitcoin-segwit2x at lists.linuxfoundation.org> wrote:
> I appreciate all of the feedback!  If the consensus is that it's simply not
> worth the effort given the very low risk factor, then I completely
> understand.
> On a somewhat related note (but not really), has there been any thought
> given to completely eliminating the MaxBaseBlockSize variable in a similar
> fashion to Greg's recent PR to Core? Doing so may remove some
> kludge/confusion from any future softforks that modify/tweak the discount
> and efficient use of the 8MB blockspace.
> (ie. reducing scale factor to 2, thus allowing for 4MB for legacy and
> non-witness data instead of 2MB, etc)
> Greg's PR:
> https://github.com/bitcoin/bitcoin/pull/10618
> Oliver
> On Jul 10, 2017 3:40 PM, "Peter Todd" <pete at petertodd.org> wrote:
>> On Mon, Jul 10, 2017 at 01:50:20PM -0400, Oliver Petruzel via
>> Bitcoin-segwit2x wrote:
>> > ALCON,
>> > I'm not privy to discussions occurring in Slack or elsewhere, so I think
>> > this list may be the most appropriate medium for the following question:
>> >
>> > Has any thought been given to addressing/fixing Segwit's
>> > anyone-can-spend
>> > issue at the time of the SegWit2x hardfork?
>> In addition to everyone elses comments, I'll point out that UASF's
>> absolutely
>> eliminate this theoretical problem.
>> --
>> https://petertodd.org 'peter'[:-1]@petertodd.org
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