From: Alex Morcos <morcos@gmail•com>
To: Justus Ranvier <justus@openbitcoinprivacyproject•org>
Cc: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Why not Child-Pays-For-Parent?
Date: Fri, 10 Jul 2015 13:51:00 -0400 [thread overview]
Message-ID: <CAPWm=eWH9rZpwJeK2tTdHH8+BWDU_Vam8oBtG0u49v2yZuYVfw@mail.gmail.com> (raw)
In-Reply-To: <559FFAB3.2010309@openbitcoinprivacyproject.org>
[-- Attachment #1: Type: text/plain, Size: 1623 bytes --]
I think the biggest problem with merging CPFP right now is that at least in
its current implementation it is not efficient enough in certain
situations,.
On Fri, Jul 10, 2015 at 1:02 PM, Justus Ranvier <
justus@openbitcoinprivacyproject•org> wrote:
> On 07/10/2015 11:31 AM, Jeff Garzik wrote:
> > This is a good explanation but it does not address reachability. TX_a,
> the
> > first tx sent out on the network, presumably has insufficient fee to get
> > mined - which also means it did not necessarily even reach all miners.
> >
> > Simply sending out TX_b with added fee does not guarantee that nodes
> > suddenly have TX_a, which they may have ignored/dropped before.
>
> I'm not sure why that's actually a problem.
>
> CPFP is initiated by the recipient of the parent transaction, and so if
> the recipient is creating this transaction in the first place they must
> have a copy of the parent transaction which can/should broadcast at the
> same time.
>
> If the child reaches a CPFP miner, then presumably the parents made it
> as well (any path between the sender and the miner that doesn't relay
> the parent should reject the child as trying to spend non-existent
> coins), so both of the transactions can be mined at the same time.
>
> --
> Justus Ranvier
> Open Bitcoin Privacy Project
> http://www.openbitcoinprivacyproject.org/
> justus@openbitcoinprivacyproject•org
> E7AD 8215 8497 3673 6D9E 61C4 2A5F DA70 EAD9 E623
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists•linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>
[-- Attachment #2: Type: text/html, Size: 2453 bytes --]
next prev parent reply other threads:[~2015-07-10 17:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 16:09 Richard Moore
2015-07-10 16:13 ` Jeff Garzik
2015-07-10 16:25 ` Richard Moore
2015-07-10 16:26 ` Dan Bryant
2015-07-10 16:28 ` Tier Nolan
2015-07-10 16:31 ` Jeff Garzik
2015-07-10 17:02 ` Justus Ranvier
2015-07-10 17:16 ` Dan Bryant
2015-07-10 17:51 ` Alex Morcos [this message]
2015-07-10 19:39 ` Tier Nolan
2015-07-10 21:10 ` Luke Dashjr
2015-07-11 20:28 ` Micha Bailey
2015-07-11 21:30 ` Dan Bryant
2015-07-11 22:29 ` Jeff Garzik
2015-07-12 10:18 ` Matt Whitlock
2015-07-11 23:19 ` Tier Nolan
2015-07-10 17:28 ` Tier Nolan
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='CAPWm=eWH9rZpwJeK2tTdHH8+BWDU_Vam8oBtG0u49v2yZuYVfw@mail.gmail.com' \
--to=morcos@gmail$(echo .)com \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
--cc=justus@openbitcoinprivacyproject$(echo .)org \
/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