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From: Peter Todd <pete@petertodd.org>
To: Tom <tomz@freedommail.ch>,
	Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Requesting BIP assignment; Flexible Transactions.
Date: Thu, 22 Sep 2016 14:27:29 -0400	[thread overview]
Message-ID: <20160922182729.GA19254@fedora-21-dvm> (raw)
In-Reply-To: <1530052.vkWv7VPOpL@garp>

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On Thu, Sep 22, 2016 at 10:47:03AM +0200, Tom via bitcoin-dev wrote:
> On Wednesday 21 Sep 2016 18:45:55 adiabat via bitcoin-dev wrote:
> > Hi-
> > 
> > One concern is that this doesn't seem compatible with Lightning as
> > currently written.  Most relevant is that non-cooperative channel close
> > transactions in Lightning use OP_CHECKSEQUENCEVERIFY, which references the
> > sequence field of the txin; if the txin doesn't have a sequence number,
> > OP_CHECKSEQUENCEVERIFY can't work.
> > 
> > LockByBlock and LockByTime aren't described and there doesn't seem to be
> > code for them in the PR (186).  If there's a way to make OP_CLTV and OP_CSV
> > work with this new format, please let us know, thanks!
> 
> LockByBlock and LockByTime are still TODOs because I didn't have time to go
> in-dept into how BIP68 does the encoding.
> The intent is that these tags, while loading, will set the sequence integer in 
> the txin as the old version does. And while saving we do the reverse.
> 
> In other words; the lack of sequence number in the saved format doesn't affect 
> the in-memory format of the transaction. The in-memory version is the one that 
> script will operate on.
> 
> This means that there is no change in how CSV will work before and after on 
> any level other than serialisation.

CSV uses per-input sequence numbers; you only have a per-tx equivalent.

-- 
https://petertodd.org 'peter'[:-1]@petertodd.org

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  reply	other threads:[~2016-09-22 18:27 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-21 22:45 [bitcoin-dev] Requesting BIP assignment; Flexible Transactions adiabat
2016-09-22  8:47 ` Tom
2016-09-22 18:27   ` Peter Todd [this message]
2016-09-22 18:37     ` Tom
2016-09-22 19:59       ` Jonas Schnelli
2016-09-22 20:07         ` Tom
2016-09-23 11:55       ` Christian Decker
2016-09-23 13:13         ` Tom
  -- strict thread matches above, loose matches on Subject: below --
2016-09-20 17:15 Tom
2016-09-20 21:31 ` Luke Dashjr
2016-09-21  9:32   ` Tom
2016-09-20 21:56 ` Peter Todd
2016-09-21  9:32   ` Tom
2016-09-22 18:26     ` Peter Todd
2016-09-22 18:47       ` Tom
2016-09-21 12:00 ` Andreas Schildbach
2016-09-21 12:58   ` Tom
     [not found] ` <CAAS2fgSpnshZhS7N5R3Qsw_8=NN8sjYGwrnUpdwGzu2TG0-Qgw@mail.gmail.com>
2016-09-21 18:01   ` Gregory Maxwell
2016-09-22  8:56     ` Tom
2016-09-22 11:10       ` Christian Decker
2016-09-22 12:09         ` Tom
2016-09-23 11:42           ` Christian Decker
2016-09-23 13:17             ` Tom

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