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
116
117
118
119
|
Return-Path: <peter@coinkite.com>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id AD023DB7
for <bitcoin-dev@lists.linuxfoundation.org>;
Thu, 21 Jun 2018 20:28:17 +0000 (UTC)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.6
Received: from smtp105.ord1c.emailsrvr.com (smtp105.ord1c.emailsrvr.com
[108.166.43.105])
by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 56DF2334
for <bitcoin-dev@lists.linuxfoundation.org>;
Thu, 21 Jun 2018 20:28:17 +0000 (UTC)
Received: from smtp6.relay.ord1c.emailsrvr.com (localhost [127.0.0.1])
by smtp6.relay.ord1c.emailsrvr.com (SMTP Server) with ESMTP id
AECD8A0293; Thu, 21 Jun 2018 16:28:16 -0400 (EDT)
X-Auth-ID: peter@coinkite.com
Received: by smtp6.relay.ord1c.emailsrvr.com (Authenticated sender:
peter-AT-coinkite.com) with ESMTPSA id 66757A0290;
Thu, 21 Jun 2018 16:28:16 -0400 (EDT)
X-Sender-Id: peter@coinkite.com
Received: from coinkite.com ([UNAVAILABLE]. [216.223.137.93])
(using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384)
by 0.0.0.0:465 (trex/5.7.12); Thu, 21 Jun 2018 16:28:16 -0400
Date: Thu, 21 Jun 2018 16:28:15 -0400
From: "Peter D. Gray" <peter@coinkite.com>
To: Jonas Schnelli <dev@jonasschnelli.ch>
Message-ID: <20180621202814.GE99379@coinkite.com>
Reply-To: Peter Gray <peter@coinkite.com>
References: <CAPg+sBhGMxXatsyCAqeboQKH8ASSFAfiXzxyXR9UrNFnah5PPw@mail.gmail.com>
<5b6b9d44-8e6c-2799-438e-d311e221bb57@satoshilabs.com>
<8CF4BD50-0ECE-4F96-B978-397116CD76CE@jonasschnelli.ch>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature"; boundary="HeFlAV5LIbMFYYuh"
Content-Disposition: inline
In-Reply-To: <8CF4BD50-0ECE-4F96-B978-397116CD76CE@jonasschnelli.ch>
Organization: Coinkite Cryptobank (www.coinkite.com)
User-Agent: Mutt/1.6.0 (2016-04-01)
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE
autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
smtp1.linux-foundation.org
X-Mailman-Approved-At: Thu, 21 Jun 2018 20:29:04 +0000
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP 174 thoughts
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Protocol 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: Thu, 21 Jun 2018 20:28:17 -0000
--HeFlAV5LIbMFYYuh
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
On Tue, Jun 19, 2018 at 05:20:34PM +0200, Jonas Schnelli wrote:
=2E..
>=20
> I don=E2=80=99t see any reasons why space would be an issue.
>=20
> HWWs probably can=E2=80=99t handle PBST natively since it is not optimise=
d for
> presenting various informations in a signing-verification.
The Coldcard hardware wallet is PSBT native and does work directly from PSB=
T.
> A single stream-in of a PSBT through USB (or similar channel) will not wo=
rk in
> many cases since HWW come often with very restrictive RAM constraints.
For the Coldcard, we expect a PSBT to be 'uploaded' over USB (can
also be provided on MicroSD card) and we work in-place with it,
scanning over it a few different times. If the user approves the
transaction, we produce a signed PSBT or final transaction and that
gets downloaded.
We support 256k byte PSBT files with hundreds of inputs/outputs
(IIRC, and exact limits still TBD) and are operating in a system
with only 25k free RAM after startup.
> Furthermore, I forget to mention in my last mail, that registering (or de=
fining)
> a mime-type for PSBT would probably a great usability feature.
> (Send PSBT by email/messanger and with dbl-click to open feature, etc.)
+1 for mimetype, especially since it's a binary format.
---
Peter D. Gray || Founder, Coinkite || Twitter: @dochex || GPG: A3A31B=
AD 5A2A5B10
--HeFlAV5LIbMFYYuh
Content-Type: application/pgp-signature; name="signature.asc"
-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - https://gpgtools.org
iQEcBAEBCgAGBQJbLApeAAoJEKOjG61aKlsQl+MH/25njF1nMNH8/nF5Vn9/N5KA
5aKC+QPh3m0mM01uYUvsmM2wlDlZtDkCMowus1cqeqPXu+xyFBnESvHlpI8hjm5k
nJsaz6Dd6zXC1xoxAq9aLcF7O9ntJxCAzSOAMFDbubwf11ixFBPefXoV4OeUARB0
D5mhvb6MNmXl2ZCarLlFJ2VIlIPdHhjyBbdB2STu1CaRynJZmuIF6Dia2M1MlSsH
bw8kvo6BEgyxeyX0HiyGeuUBtZbpbVf4ZL6AHdN76P1wfQlgkcLVYVgVx7VoVpBC
C5jgbcRLNPKH5M0SI1xUvYttqFnXP9aLAfpKtT2UackmGKFe8zvdW2cyi+s5y8w=
=IHUQ
-----END PGP SIGNATURE-----
--HeFlAV5LIbMFYYuh--
|