public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Christian Decker <decker.christian@gmail.com>
To: Gregory Maxwell <gmaxwell@gmail.com>, Luke Dashjr <luke@dashjr.org>
Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] [BIP] Normalized transaction IDs
Date: Wed, 21 Oct 2015 08:49:26 +0000	[thread overview]
Message-ID: <CALxbBHV14BW+S809rX0TuAjB65b90=1bnN6pondQO6qWVPi3+w@mail.gmail.com> (raw)
In-Reply-To: <CAAS2fgR7X2j9buFQXvgmWZCfoasRa=nLB5efnu-ZnqFZC+SeuQ@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 1653 bytes --]

On Wed, Oct 21, 2015 at 10:26 AM Gregory Maxwell <gmaxwell@gmail.com> wrote:

> On Wed, Oct 21, 2015 at 7:48 AM, Gregory Maxwell <gmaxwell@gmail.com>
> wrote:
> > I'm still sad that uniform segregated witeness is so hard to deploy,
> > adding another id to every utxo set won't be a nice cost. :( But I
> > have been trying for a long time to come up with anything better and
> > not being successful.
>
> Oh good. Luke solved it.
>
> To deploy SW without a disruptive flag day this encoding could be used:
>
> A new P2SH like scriptPubkey type is defined. In the soft-fork, the
> scriptsig for this scriptPubkey is required to be empty.
>
> Signatures are not covered under txid, but carried along side. Then
> committed to in blocks in a separate hashtree.
>
>
Isn't that sort of what this BIP describes as well? Except that we use the
scriptSig to transport the signatures internally to the transactions and
strip them when it comes to signing/checking? The wire format and transport
of transactions do not change so old clients continue to fetch and process
transactions as before, they just can't verify the TX. Blocks still
reference the instance but verification uses the stripped TX with the
signatures on the side, etc.


> The only disadvantage to the approach used in elements alpha that I
> can come up with so far (in the few minutes since luke turned my can't
> into a can) is that that the approach in EA did not disrupt the normal
> relay handling process, and this would, since relay that transports
> the extradata either needs to use a different hash that includes the
> witness, or have a separate mechanism for witness transport.
>

[-- Attachment #2: Type: text/html, Size: 2201 bytes --]

  reply	other threads:[~2015-10-21  8:49 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-19 14:01 [bitcoin-dev] [BIP] Normalized transaction IDs Christian Decker
2015-10-19 15:23 ` Tier Nolan
2015-10-19 19:28   ` Christian Decker
2015-10-19 22:22   ` s7r
2015-10-20 10:30     ` Christian Decker
2015-10-21  6:18 ` Luke Dashjr
2015-10-21  7:39   ` Christian Decker
2015-10-21  7:52     ` Luke Dashjr
2015-10-21  8:31       ` Christian Decker
2015-10-21  8:39         ` Luke Dashjr
2015-10-21  8:44           ` Christian Decker
2015-10-21  8:46             ` Luke Dashjr
2015-10-21 18:22               ` Danny Thorpe
2015-10-21 19:27                 ` Gregory Maxwell
2015-10-21 23:20                 ` Luke Dashjr
2015-10-22  8:26                   ` Christian Decker
2015-10-22  8:57                     ` Gregory Maxwell
2015-10-22 11:54                       ` Christian Decker
2015-10-22  9:05                     ` Luke Dashjr
2015-11-03 20:37                       ` Christian Decker
2015-11-03 20:48                         ` Luke Dashjr
2015-11-03 21:44                           ` Christian Decker
2015-11-03 22:01                             ` Luke Dashjr
2015-11-05 15:27                               ` Jorge Timón
2015-11-05 19:36                                 ` Luke Dashjr
2015-11-05 20:25                                   ` Jorge Timón
2015-11-05 22:46                                     ` s7r
2015-11-05 22:29                                   ` Adam Back
2015-11-06 14:52                                 ` Christian Decker
2015-11-04  4:00                             ` Peter Todd
2015-11-05  9:38                               ` Christian Decker
2015-10-21  7:48   ` Gregory Maxwell
2015-10-21  8:26     ` Gregory Maxwell
2015-10-21  8:49       ` Christian Decker [this message]
2015-10-21  8:50         ` Christian Decker
2015-10-21 10:14         ` Gregory Maxwell

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='CALxbBHV14BW+S809rX0TuAjB65b90=1bnN6pondQO6qWVPi3+w@mail.gmail.com' \
    --to=decker.christian@gmail.com \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    --cc=gmaxwell@gmail.com \
    --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