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From: Anthony Towns <aj@erisian•com.au>
To: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Capacity increases for the Bitcoin system.
Date: Mon, 21 Dec 2015 18:07:47 +1000	[thread overview]
Message-ID: <20151221080747.GA24839@sapphire.erisian.com.au> (raw)
In-Reply-To: <CADJgMzuk9Q09AnmR5=77p0HfkeUWOTRSNCSkAAQN0zDq4Hsbqw@mail.gmail.com>

On Mon, Dec 21, 2015 at 05:21:55AM +0000, Btc Drak via bitcoin-dev wrote:
> On Mon, Dec 21, 2015 at 4:33 AM, Pieter Wuille via bitcoin-dev <
> > So I'd like to ask the community that we work towards this plan, as it
> > allows to make progress without being forced to make a possibly divisive
> > choice for one hardfork or another yet.
> Thank you for saying this. I also think the plan is solid and delivers
> multiple benefits without being contentious. The number of wins are so
> numerous, it's frankly a no-brainer.

+1's are off-topic, but... +1. My impression is that each of libsecp256k1,
versionbits, segregated witness, IBLT, weak blocks, and OP_CSV have
been demonstrated to be significant improvements that are implementable,
and don't introduce any new attacks or risks [0]. There's some freaking
awesome engineering that's gone into all of those.

> I guess the next step for segwit is a BIP and deployment on a testnet?

I think the following proposed features are as yet missing from Pieter's
segwit branch, and I'm guessing patches for them would be appreciated:

 - enforcing the proposed base+witness/4 < 1MB calculation
 - applying limits to sigops seen in witness signatures

I guess there might be other things that still need to be implemented
as well (and presumably bugs of course)?

I think I'm convinced that the proposed plan is the best approach (as
opposed to separate base<1MB, witness<3MB limits, or done as a hard fork,
or without committing to a merkle head for the witnesses, eg), though.

jl2012 already pointed to a draft segwit BIP in another thread, repeated
here though:

 https://github.com/jl2012/bips/blob/segwit/bip-segwit.mediawiki

Cheers,
aj (hoping that was enough content after the +1 to not get modded ;)

[0] I'm still not persuaded that even a small increase in blocksize
    doesn't introduce unacceptable risks (frankly, I'm not entirely
    persuaded the *current* limits don't have unacceptable risk) and that
    frustrates me no end. But I guess (even after six months of reading
    arguments about it!) I'm equally unpersuaded that there's actually
    more to the intense desire for more blocksize is anything other than
    fear/uncertainty/doubt mixed with a desire for transactions to be
    effectively free, rather than costing even a few cents each... So,
    personally, since the above doesn't really resolve that quandry
    for me, it doesn't really resolve the blocksize debate for me
    either. YMMV.



  reply	other threads:[~2015-12-21  8:07 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-07 22:02 Gregory Maxwell
2015-12-07 22:54 ` Bryan Bishop
2015-12-08  2:42 ` Anthony Towns
2015-12-08  4:58   ` Anthony Towns
2015-12-08  5:21     ` Gregory Maxwell
2015-12-08  6:54       ` Anthony Towns
2016-01-18 12:02     ` Anthony Towns
2016-01-22  9:46       ` Anthony Towns
2015-12-08 11:07 ` Wladimir J. van der Laan
2015-12-08 11:14   ` Jorge Timón
2015-12-08 15:12     ` Gavin Andresen
2015-12-08 15:55       ` Justus Ranvier
2015-12-08 17:41         ` Mark Friedenbach
2015-12-08 18:43           ` Justus Ranvier
2015-12-08 19:08           ` Tier Nolan
2015-12-08 19:31         ` Gregory Maxwell
2015-12-08 23:40         ` Jonathan Toomim
2015-12-08 23:48           ` Luke Dashjr
2015-12-09  0:54             ` Jonathan Toomim
2015-12-08 23:50           ` Jorge Timón
2015-12-09  0:56             ` Jonathan Toomim
2015-12-08 23:59       ` Gregory Maxwell
2015-12-09  0:58         ` Jorge Timón
2015-12-09  1:02           ` Jorge Timón
2015-12-09  1:09         ` Gavin Andresen
2015-12-09  1:31           ` Gregory Maxwell
2015-12-09  4:44             ` Ryan Butler
2015-12-09  6:29               ` Gregory Maxwell
2015-12-09  6:36                 ` Ryan Butler
2015-12-09  6:59                 ` Mark Friedenbach
2015-12-09  7:17                   ` Gregory Maxwell
2015-12-09  7:54                 ` Jorge Timón
2015-12-09  8:03                   ` Gregory Maxwell
2015-12-09  8:46                     ` Mark Friedenbach
2015-12-09 11:08                     ` Jorge Timón
2015-12-09 16:40                     ` Gavin Andresen
2015-12-11 16:18                       ` Jorge Timón
2015-12-11 16:43                         ` Gavin Andresen
2015-12-12  5:13                           ` digitsu
2015-12-12 15:18                             ` Mark Friedenbach
2015-12-14 11:21                               ` Jonathan Toomim
2015-12-14 12:44                                 ` Adam Back
2015-12-09  4:51             ` Anthony Towns
2015-12-09 14:51       ` Chris
     [not found]   ` <CAPWm=eUomq6SBC0ky0WSs5=_G942vigm4RmgYuq0O-yJ-vqC2A@mail.gmail.com>
     [not found]     ` <CAPg+sBig9O5+he0PWhTkX5iin14QLz5+eCCu6KfwU=DxntKYtg@mail.gmail.com>
2015-12-21  4:33       ` Pieter Wuille
2015-12-21  4:42         ` Justus Ranvier
2015-12-21  4:44         ` Alex Morcos
2015-12-21  4:50         ` Mark Friedenbach
2015-12-21  5:29           ` Douglas Roark
2015-12-21  5:21         ` Btc Drak
2015-12-21  8:07           ` Anthony Towns [this message]
2015-12-21  9:56             ` Jorge Timón
2015-12-08 23:48 ` Jonathan Toomim
2015-12-09  0:23   ` Gregory Maxwell
     [not found]   ` <CAAS2fgRP8bLWZoKR9-iJS-2RKTGQQ9NG-LpAfa2BOdcR=GuB_A@mail.gmail.com>
2015-12-09  0:40     ` Jonathan Toomim
2015-12-09 12:28 Daniele Pinna

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