From: Luke Dashjr <luke@dashjr•org>
To: Christian Decker <decker.christian@gmail•com>
Cc: Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] [BIP] Normalized transaction IDs
Date: Thu, 22 Oct 2015 09:05:26 +0000 [thread overview]
Message-ID: <201510220905.27124.luke@dashjr.org> (raw)
In-Reply-To: <CALxbBHUK_na0qKEBrkCzV2oAUc90wpL4z=7h6Zuu4XzaKEazrA@mail.gmail.com>
On Thursday, October 22, 2015 8:26:58 AM Christian Decker wrote:
> I think the scenario of the single signer re-ordering the outputs and
> inputs and then re-signing the transaction is in the same category of
> simple double-spends. The signer could just as well sign a completely
> different transaction spending the same coins to somewhere else, so I don't
> think there is a lot we can do about it even if we instate a canonical
> ordering. Even if we order the inputs and outputs the signer can just add a
> new input and output and we would have a different transaction.
>
> Normalized transaction IDs do help in the case that the single signer wants
> to immediately follow up its transaction with another transaction spending
> the first one's change output, and it prevents any modification in the
> multi-signer scenario.
Except that unlike malicious double spending, adding more outputs to
unconfirmed transactions is what wallets *should ideally be doing every time
they send another transaction*. Spending unconfirmed change is the wrong
approach. So half-fixing malleability as this PR would, encourages
inefficient behaviour in multiple ways (first, by not making it malleability-
safe; second, by encouraging spending unconfirmed change).
Luke
next prev parent reply other threads:[~2015-10-22 9:05 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-19 14:01 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 [this message]
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
2015-10-21 8:50 ` Christian Decker
2015-10-21 10:14 ` Gregory Maxwell
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