From: Tier Nolan <tier.nolan@gmail•com>
Cc: Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Dealing with OP_IF and OP_NOTIF malleability
Date: Fri, 6 Nov 2015 09:37:58 +0000 [thread overview]
Message-ID: <CAE-z3OX6bMY+RjphyDS-zAO=aXLs-B41G4m6ssUjFC03ByQkWA@mail.gmail.com> (raw)
In-Reply-To: <8D9D1049-E502-4A37-ACE4-5A2B1369A90A@gmail.com>
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I meant not to use the OP_PUSH opcodes to do the push.
Does OP_0 give a zero length byte array?
Would this script return true?
OP_0
OP_PUSHDATA1 (length = 1, data = 0)
OP_EQUAL
The easiest definition is that OP_0 and OP_1 must be used to push the data
and not any other push opcodes.
On Fri, Nov 6, 2015 at 9:32 AM, Oleg Andreev <oleganza@gmail•com> wrote:
>
> > One and zero should be defined as arrays of length one. Otherwise, it is
> still possible to mutate the transaction by changing the length of the
> array.
> >
> > They should also be minimally encoded but that is covered by previous
> rules.
>
> These two lines contradict each other. Minimally-encoded "zero" is an
> array of length zero, not one. I'd suggest defining this explicitly here as
> "IF/NOTIF argument must be either zero-length array or a single byte 0x01".
>
>
>
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next prev parent reply other threads:[~2015-11-06 9:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-06 8:13 jl2012
2015-11-06 9:22 ` Nick ODell
2015-11-06 9:27 ` Tier Nolan
2015-11-06 9:32 ` Oleg Andreev
2015-11-06 9:37 ` Tier Nolan [this message]
2015-11-06 10:16 ` jl2012
2015-11-10 10:52 ` Oleg Andreev
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