summaryrefslogtreecommitdiff
path: root/1f/12848cd1e48a33f1f6529b52dea1964065ac70
blob: 68bac28dd0d4af3cd0c707d2eb2385c8d292021f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
Return-Path: <pete@petertodd.org>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
	[172.17.192.35])
	by mail.linuxfoundation.org (Postfix) with ESMTPS id 6491085
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Wed,  2 Dec 2015 09:27:50 +0000 (UTC)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.6
Received: from outmail148111.authsmtp.net (outmail148111.authsmtp.net
	[62.13.148.111])
	by smtp1.linuxfoundation.org (Postfix) with ESMTP id 8812E115
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Wed,  2 Dec 2015 09:27:49 +0000 (UTC)
Received: from mail-c247.authsmtp.com (mail-c247.authsmtp.com [62.13.128.247])
	by punt23.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tB29RlDx035423;
	Wed, 2 Dec 2015 09:27:47 GMT
Received: from muck ([210.13.100.19]) (authenticated bits=128)
	by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tB29Re5R086466
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO);
	Wed, 2 Dec 2015 09:27:44 GMT
Date: Wed, 2 Dec 2015 17:27:39 +0800
From: Peter Todd <pete@petertodd.org>
To: Chris <ctpacia@gmail.com>
Message-ID: <20151202092739.GA19610@muck>
References: <20151117004218.GB6302@savin.petertodd.org>
	<565BC352.4080001@gmail.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;
	protocol="application/pgp-signature"; boundary="liOOAslEiF7prFVr"
Content-Disposition: inline
In-Reply-To: <565BC352.4080001@gmail.com>
X-Server-Quench: f25f98d3-98d6-11e5-bcde-0015176ca198
X-AuthReport-Spam: If SPAM / abuse - report it at:
	http://www.authsmtp.com/abuse
X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR
	aAdMdgAUHFAXAgsB AmMbW11eUlp7XWU7 aQtRcwRefEtOXxtr
	WVdMSlVNFUsscx4I ZEsbMBl6cQFAfjB1 ZEFmECZZWRJzfRJ+
	X0dcQWsbZGY1bX1N AxQNagNUcQZLeRkW O1F2XD1vNG8XDSg5
	AwQ0PjZ0MThBHWxy Wh1ILFRab1sPGnYG SggGFD4iWGcUAgs+
	IlRmBEMYGAMrGGtz WY83
X-Authentic-SMTP: 61633532353630.1038:706
X-AuthFastPath: 0 (Was 255)
X-AuthSMTP-Origin: 210.13.100.19/587
X-AuthVirus-Status: No virus detected - but ensure you scan with your own
	anti-virus system.
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW
	autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	smtp1.linux-foundation.org
Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] Opt-in Full Replace-By-Fee (Full-RBF)
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Wed, 02 Dec 2015 09:27:50 -0000


--liOOAslEiF7prFVr
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Sun, Nov 29, 2015 at 10:32:34PM -0500, Chris via bitcoin-dev wrote:
> On 11/16/2015 07:42 PM, Peter Todd via bitcoin-dev wrote:
> > Sequence is used for opting in as it is the only "free-form" field
> > available for that purpose. Opt-in per output was proposed as well by
> > Luke-Jr, however the CTxOut data structure simply doesn't contain any
> > extra fields to use for that purpose.
> What is wrong with using they same scheme as sighash_single?
>=20
> If input 0 has nSequence < maxint-1 then output 0 is replaceable.
>=20
> For fee bumps you would just stick the change in position zero and
> reduce the value.
>=20
> You get FFS functionality without the hassle of addition other inputs.

Again, you're giving the whole world information about what's your
change address; that's simply unacceptable for privacy.

The only way to solve this is by a scheme where you pre-commit via a
hash, and reveal that later, which is extremely complex and not easily
feasible given the current tx data structure.

--=20
'peter'[:-1]@petertodd.org
0000000000000000019a7c015d7b61baa25e8afd4f1dcade4133d8a1d6b7445d

--liOOAslEiF7prFVr
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature

-----BEGIN PGP SIGNATURE-----
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==
=Jyy7
-----END PGP SIGNATURE-----

--liOOAslEiF7prFVr--