public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: jl2012@xbt.hk
To: Luke Dashjr <luke@dashjr.org>
Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] BIP 113: Median time-past is a HARDfork, not a softfork!
Date: Sun, 01 Nov 2015 23:27:50 -0500	[thread overview]
Message-ID: <67789addeb5a0e702998f26cc16a8dbd@xbt.hk> (raw)
In-Reply-To: <201511011906.44081.luke@dashjr.org>

Currently, a tx maybe included in a block only if its locktime (x) is 
smaller than the timestamp of a block (y)

BIP113 says that a tx maybe included in a block only if x is smaller 
than the median-time-past (z)

It is already a consensus rule that y > z. Therefore, if x < z, x < y

The new rule is absolutely stricter than the old rule, so it is a 
softfork. Anything wrong with my interpretation?

Luke Dashjr via bitcoin-dev 於 2015-11-01 14:06 寫到:
> BIP 113 makes things valid which currently are not (any transaction 
> with a
> locktime between the median time past, and the block nTime). Therefore 
> it is a
> hardfork. Yet the current BIP describes and deploys it as a softfork.
> 
> Furthermore, Bitcoin Core one week ago merged #6566 adding BIP 113 
> logic to
> the mempool and block creation. This will probably produce invalid 
> blocks
> (which CNB's safety TestBlockValidity call should catch), and should be
> reverted until an appropriate solution is determined.
> 
> Rusty suggested something like adding N hours to the median time past 
> for
> comparison, and to be a proper hardfork, this must be max()'d with the 
> block
> nTime. On the other hand, if we will have a hardfork in the next year 
> or so,
> it may be best to just hold off and deploy as part of that.
> 
> Further thoughts/input?
> 
> Luke
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev



  reply	other threads:[~2015-11-02  4:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-01 19:06 [bitcoin-dev] BIP 113: Median time-past is a HARDfork, not a softfork! Luke Dashjr
2015-11-02  4:27 ` jl2012 [this message]
2015-11-02  5:06   ` Luke Dashjr

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=67789addeb5a0e702998f26cc16a8dbd@xbt.hk \
    --to=jl2012@xbt.hk \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    --cc=luke@dashjr.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
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