Date: Fri, 2 Sep 2016 05:47:14 +0000
From: Peter Todd <pete@petertodd.org>
To: Johnson Lau <jl2012@xbt.hk>,
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Message-ID: <20160902054714.GA1685@fedora-21-dvm>
References: <1317364559.64256.1472791258452@privateemail.com>
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In-Reply-To: <1317364559.64256.1472791258452@privateemail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Subject: Re: [bitcoin-dev] New BIP: Dealing with dummy stack element
 malleability
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On Fri, Sep 02, 2016 at 12:40:58AM -0400, Johnson Lau via bitcoin-dev wrote:
> Deployment
>=20
> This BIP will be deployed by "version bits" BIP9 using the same parameter=
s for BIP141 and BIP143, with the name "segwit" and using bit 1.
>=20
> For Bitcoin mainnet, the BIP9 starttime is midnight TBD UTC (Epoch timest=
amp TBD) and BIP9 timeout is midnight TBD UTC (Epoch timestamp TBD).
>=20
> For Bitcoin testnet, the BIP9 starttime is midnight 1 May 2016 UTC (Epoch=
 timestamp 1462060800) and BIP9 timeout is midnight 1 May 2017 UTC (Epoch t=
imestamp 1493596800).
>=20
> Compatibility
>=20
> The reference client has produced compatible signatures from the beginnin=
g, and the NULLDUMMY rule has been enforced as relay policy by the referenc=
e client since v0.10.0. There has been no transactions violating the requir=
ement being added to the chain since at least August 2015. In addition, eve=
ry non-compliant signature can trivially be converted into a compliant one,=
 so there is no loss of functionality by this requirement.

This should say "for all scriptPubKey types in actual use, non-compliant
signatures can trivially be converted into compliant ones"

You can of course create a scriptPubKey where that's not possible, but
fortunately no-one appears to do that.


Also, as original author of NULLDUMMY, thanks for finally making it into a
soft-fork!

--=20
https://petertodd.org 'peter'[:-1]@petertodd.org

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