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From: "Peter D. Gray" <peter@coinkite.com>
To: Jonas Schnelli <dev@jonasschnelli.ch>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP 174 thoughts
Date: Thu, 21 Jun 2018 16:28:15 -0400	[thread overview]
Message-ID: <20180621202814.GE99379@coinkite.com> (raw)
In-Reply-To: <8CF4BD50-0ECE-4F96-B978-397116CD76CE@jonasschnelli.ch>

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On Tue, Jun 19, 2018 at 05:20:34PM +0200, Jonas Schnelli wrote:
...
> 
> I don’t see any reasons why space would be an issue.
> 
> HWWs probably can’t handle PBST natively since it is not optimised for
> presenting various informations in a signing-verification.

The Coldcard hardware wallet is PSBT native and does work directly from PSBT.

> A single stream-in of a PSBT through USB (or similar channel) will not work 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 defining)
> 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: A3A31BAD 5A2A5B10


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  reply	other threads:[~2018-06-21 20:28 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15 23:34 [bitcoin-dev] BIP 174 thoughts Pieter Wuille
2018-06-16 15:00 ` Peter D. Gray
2018-06-19  9:38 ` Jonas Schnelli
2018-06-19 14:20 ` matejcik
2018-06-19 15:20   ` Jonas Schnelli
2018-06-21 20:28     ` Peter D. Gray [this message]
2018-06-19 17:16   ` Pieter Wuille
2018-06-21 11:29     ` matejcik
2018-06-21 17:39       ` Pieter Wuille
2018-06-21 11:44     ` Tomas Susanka
2018-06-19 14:22 ` matejcik
2018-06-21  0:39 ` Achow101
2018-06-21 14:32   ` Tomas Susanka
2018-06-21 15:40     ` Greg Sanders
2018-06-21 19:56     ` Peter D. Gray
2018-06-21 21:39       ` Gregory Maxwell
2018-06-22 19:10       ` Pieter Wuille
2018-06-22 22:28         ` Achow101
2018-06-23 17:00           ` William Casarin
2018-06-23 20:33             ` Andrew Chow
2018-06-24  8:19               ` Andrea
2018-06-24  8:28                 ` Andrew Chow
2018-06-24  9:00                   ` Andrea
2018-06-23 18:27           ` Peter D. Gray
2018-06-25 19:47           ` Tomas Susanka
2018-06-25 20:10             ` Jonas Schnelli
2018-06-25 20:30             ` Achow101
2018-06-26 15:33               ` matejcik
2018-06-26 16:58                 ` William Casarin
2018-06-26 17:11                   ` Marek Palatinus
2018-06-27 14:11                   ` matejcik
2018-06-26 20:30                 ` Pieter Wuille
2018-06-27 14:04                   ` matejcik
2018-06-27 15:06                     ` Pieter Wuille
2018-06-29  9:53                       ` matejcik
2018-06-29 19:12                         ` Achow101
2018-06-29 20:31                           ` Peter D. Gray
2018-07-04 13:19                           ` matejcik
2018-07-04 18:35                             ` Achow101
2018-07-05 17:23                               ` Jason Les
2018-07-04 19:09                             ` Pieter Wuille
2018-07-05 11:52                               ` matejcik
2018-07-05 22:06                                 ` Pieter Wuille
2018-07-10 12:10                                   ` matejcik
2018-07-11 18:27                                     ` Pieter Wuille
2018-07-11 20:05                                       ` Gregory Maxwell
2018-07-11 20:54                                         ` [bitcoin-dev] BIP 174 thoughts on graphics vv01f
2018-06-26 21:56                 ` [bitcoin-dev] BIP 174 thoughts Achow101
2018-06-27  6:09                   ` William Casarin
2018-06-27 13:39                     ` Andrea
2018-06-27 17:55                     ` Achow101
2018-06-28 20:42                       ` Rodolfo Novak
2018-07-05 19:20                       ` William Casarin
2018-07-06 18:59                         ` Achow101
2018-06-20  0:39 Jason Les

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