From: Peter Todd <pete@petertodd•org>
To: "Jorge Timón" <jtimon@jtimon•cc>
Cc: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] BIP 102 - kick the can down the road to 2MB
Date: Tue, 21 Jul 2015 09:04:12 -0400 [thread overview]
Message-ID: <20150721130412.GA4551@savin.petertodd.org> (raw)
In-Reply-To: <CABm2gDr6qXzvcpX_To39kCEsnQNTQS4M5Y40Yk_Lw481rjvSag@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1843 bytes --]
On Tue, Jul 21, 2015 at 11:26:35AM +0200, Jorge Timón via bitcoin-dev wrote:
> I still disagree. Using height instead of time may make the
> implementation more complex by requiring some additional preparations
> but using height is in fact a simpler design. Why relay on clocks that
> we know will differ in different computers and places when we have a
> universal tick with every block?
The Bitcoin protocol fundementally uses time in a consensus-critical
manner anyway; miners vote on what time it is via the median time
mechanism.
Triggering events based on median time is compatable with consensus and
gives more human scale predictability as to when events may happen. In
addition the median time is guaranteed to be monotonic by the consensus
rules.
See the version bits proposal for an example of its use:
https://gist.github.com/sipa/bf69659f43e763540550#Specification
Having said that, in general triggering events without verifying a
supermajority of miner support can be very dangerous. Without miner
support the chain is insecure, and can be attacked. For instance a
blocksize limit increase that a majority of miners choose not to
implement raises huge risks of reorg for any miners who attempt to
create large blocks, and huge risks of payment reversal for any
merchants accepting transactions in such blocks. Note how with BIP102,
extending the original Bitcoin chain is inherently an attack on the
Garzik chain.
For that reason I think BIP102 is extremely poorly designed. I can only
conclude that Jeff Garzik is either deliberately trolling us and/or
manipulating discussion with a badly designed proposal that he doesn't
actually expect to be adopted verbatim, or is incompetent.
--
'peter'[:-1]@petertodd.org
0000000000000000031c12b6af038524fd5dd28115b7f5591e046423cebaf6d1
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 650 bytes --]
next prev parent reply other threads:[~2015-07-21 13:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 15:55 Jeff Garzik
2015-07-17 16:11 ` Andrew
2015-07-17 16:12 ` Tier Nolan
2015-07-17 16:14 ` Tier Nolan
2015-07-17 17:57 ` Ross Nicoll
2015-07-17 19:06 ` Chris Wardell
2015-07-17 19:13 ` Ross Nicoll
2015-07-19 22:51 ` Ross Nicoll
2015-07-21 9:26 ` Jorge Timón
2015-07-21 13:04 ` Peter Todd [this message]
2015-07-21 13:58 ` Peter Todd
2015-07-22 15:51 ` Tom Harding
2015-07-22 17:02 ` Sriram Karra
2015-07-22 17:40 ` Sriram Karra
2015-07-22 17:43 ` Jeff Garzik
2015-07-22 22:30 ` Peter Todd
2015-07-23 5:39 ` jl2012
2015-07-22 17:00 ` jl2012
2015-07-21 22:05 ` Ross Nicoll
2015-07-23 11:24 ` Jorge Timón
2015-07-17 20:29 ` Luke Dashjr
2015-07-17 21:13 ` Angel Leon
2015-07-17 22:25 ` Tier Nolan
2015-07-18 9:22 ` Jorge Timón
2015-07-18 9:24 ` Jorge Timón
2015-07-24 8:52 ` Thomas Zander
2015-07-24 9:43 ` Slurms MacKenzie
2015-07-18 4:32 ` Venzen Khaosan
2015-07-17 22:40 Raystonn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150721130412.GA4551@savin.petertodd.org \
--to=pete@petertodd$(echo .)org \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
--cc=jtimon@jtimon$(echo .)cc \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox