From: "Jorge Timón" <jtimon@jtimon•cc>
To: Btc Drak <btcdrak@gmail•com>, Mark Friedenbach <mark@friedenbach•org>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Relative CHECKLOCKTIMEVERIFY (was CLTV proposal)
Date: Tue, 5 May 2015 21:19:00 +0200 [thread overview]
Message-ID: <CABm2gDpn-VdNQaMzKSA1tvGhhec3UxdGp-9x-U+ruTWd4ApbiA@mail.gmail.com> (raw)
In-Reply-To: <CADJgMztaJgUH81Bc1s4P45d2u-35Si7=7rON=UdZn4piycxHpw@mail.gmail.com>
Well, apparently the timestamp can be make compatible with Mark's
nSequence-based RCLTV by adding an additional check at the block level
but I was only explaining the concept using heights (which is the most
interesting part IMO).
I'm also not sure I understood the details and I don't want to confuse
people again, so I'll wait for someone else to explain that part.
ACLTV can work with timestamps too unless I'm missing something. It's
just more complexity and I was never convinced that there's enough use
cases relying on timestamps to justify them. But the timestamp
discussion is quite orthogonal to the nSequence-based RCLTV proposal
itself.
On Tue, May 5, 2015 at 2:41 AM, Btc Drak <btcdrak@gmail•com> wrote:
> On Mon, May 4, 2015 at 12:24 PM, Jorge Timón <jtimon@jtimon•cc> wrote:
>>
>> What I was describing was an attempt to fix a similar proposal by Mark
>> Friedenbach, but it didn't needed fixing: I was simply
>> misunderstanding it.
>> Mark's RCLTV is completely reorg safe, so there's no need for the 100
>> block restriction. It also keeps the script validation independent
>> from the utxo.
>> Here's is how it works:
>>
>> The operator takes a relative_height parameter and it checks that the
>> nSequence of the input is lower than that parameter.
>>
>> Additionally, a new check at the transaction level:
>>
>> for (unsigned int i = 0; i < tx.vin.size(); i++) {
>> // ...
>> if (coins->nHeight + tx.vin[i].nSequence < nSpendHeight)
>> return state.Invalid(false, REJECT_INVALID,
>> "bad-txns-non-final-input");
>> // ...
>> }
>>
>> Well, this is assuming that we're only using it with heights and not
>> timestamps.
>> Mark, feel free to elaborate further.
>
>
> Does dropping timestamp refer just to RCLTV or absolutely CLTV also? For
> absolute CLTV I think it's important to have timestamps so that trust fund
> use cases are practical (e.g. spendable on 18th birthday), because the exact
> date a future block will be mined on is unpredictable if it's far enough in
> the future (out by days or even weeks).
>
next prev parent reply other threads:[~2015-05-05 19:19 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-01 13:08 [Bitcoin-development] [BIP draft] CHECKLOCKTIMEVERIFY - Prevent a txout from being spent until an expiration time Peter Todd
2014-10-01 15:01 ` Gavin Andresen
2014-10-02 1:06 ` Peter Todd
2014-10-01 15:29 ` Sergio Lerner
2014-10-01 17:06 ` Peter Todd
2014-10-01 18:23 ` Luke Dashjr
2014-10-01 20:58 ` Gavin Andresen
2014-10-01 21:04 ` Alan Reiner
2014-10-01 21:34 ` Gavin Andresen
2014-10-02 0:12 ` Peter Todd
2014-10-02 0:05 ` Peter Todd
2014-10-02 0:55 ` Luke Dashjr
2014-10-02 1:09 ` Peter Todd
2014-10-02 15:05 ` Flavien Charlon
2014-10-03 14:28 ` Matt Whitlock
2014-10-03 14:30 ` Matt Whitlock
2014-10-03 16:17 ` Gregory Maxwell
2014-10-03 17:50 ` Luke Dashjr
2014-10-03 20:58 ` Mike Hearn
2014-10-03 23:12 ` Jeff Garzik
2014-10-04 0:38 ` Peter Todd
2014-10-04 12:58 ` Mike Hearn
2014-10-07 15:50 ` Gavin Andresen
2014-10-07 16:08 ` Mike Hearn
2014-10-08 10:26 ` Wladimir
2014-10-09 3:13 ` Alan Reiner
2014-10-09 6:14 ` Adam Back
2014-10-09 6:28 ` Gregory Maxwell
2014-10-09 6:33 ` Peter Todd
2014-10-09 6:40 ` Gregory Maxwell
2014-10-08 4:07 ` Tom Harding
2014-10-08 10:15 ` Mike Hearn
2015-03-16 22:22 ` [Bitcoin-development] Relative CHECKLOCKTIMEVERIFY (was CLTV proposal) Matt Corallo
2015-03-19 17:39 ` Zooko Wilcox-OHearn
2015-04-21 7:59 ` Peter Todd
2015-04-26 11:35 ` Jorge Timón
2015-04-26 12:20 ` Jorge Timón
2015-04-27 19:35 ` Peter Todd
2015-04-28 7:44 ` Jorge Timón
2015-05-04 2:15 ` Matt Corallo
2015-05-04 11:24 ` Jorge Timón
2015-05-05 0:41 ` Btc Drak
2015-05-05 19:19 ` Jorge Timón [this message]
2015-05-05 20:38 ` Tier Nolan
2015-05-06 7:37 ` Jorge Timón
2015-05-06 22:09 ` 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=CABm2gDpn-VdNQaMzKSA1tvGhhec3UxdGp-9x-U+ruTWd4ApbiA@mail.gmail.com \
--to=jtimon@jtimon$(echo .)cc \
--cc=bitcoin-development@lists$(echo .)sourceforge.net \
--cc=btcdrak@gmail$(echo .)com \
--cc=mark@friedenbach$(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