Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 083DF72A for ; Fri, 18 Aug 2017 22:11:26 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-oi0-f50.google.com (mail-oi0-f50.google.com [209.85.218.50]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id DC0B1461 for ; Fri, 18 Aug 2017 22:11:25 +0000 (UTC) Received: by mail-oi0-f50.google.com with SMTP id f11so109670014oic.0 for ; Fri, 18 Aug 2017 15:11:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=achow101-com.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=sBzw6uCIoxkZednsLXrjEJfiDfZW6M+VI77LzH2sVDo=; b=n3do/72HkH+egvHPdxqHfNnL4/t/ZsPDV1n9w9xC6jcQ25NSWiFquV/Auf7n6d5tbN c7yD5IA8vRyEooyyCnUWFr7tRJITXOkBhYkcHnWT+xYsl0pIJnuiQO3jbpy2qu76DR3C 0OAhLja76DPsOTCvK/iTYA9kqEb5LujujKXRsMMorlrfQ8B22NCaydhcF2a/w2rhrjLT b1SYrV4Cb1oH77wCfzMzivHVirHQAbrH/rK/N8CS1yNicwTo8xseEaRox3vjwg5zXTXn pwqLfapIjh8uAGie6HCydqNCxylQFLsVEQ3z3E0/90pun+qXKwc4h9UoEucjctYRCaWN t6hw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=sBzw6uCIoxkZednsLXrjEJfiDfZW6M+VI77LzH2sVDo=; b=I68ygxVlHRF2httbuGmG/sAurUFqcIdsSQoubI4ijVsp9CT9Yl8HJ7K++7ndyPLGjR 70c3sgS0rEnqWIgIWVx+ZXjhmzo8wNR4LVJDWubBK5TJl7Tr7fVu2tQh3YZJMn1bR/TV etWbicXsCBjtDpGq24utar1dRfEbOuh7a+PLH8B1L6avmMLy46R98QpFvUI6A+F88CxE eXO+WPQm+uhOAmI6XeBVSbWLFKSTQQ8G+TSZYY34AHKdTZ2eHQbmx5DYQVKAJ0Km2kuK mDr1wrpViCqUIcI9OGt1d/AH9KmyzLi4KFc1cbYrUz6SGg6em0rcS0BbTqrxxipBZClz ZctQ== X-Gm-Message-State: AHYfb5iwciSTfScf4TAoRjpnOUQ7dc+1u7lQKdFnObv8pUyYp5OJ4HAL 4BMzlccBNYSTenfIalqLcxtD6nHCwpz/TeQ= X-Received: by 10.202.51.68 with SMTP id z65mr14460558oiz.314.1503094284983; Fri, 18 Aug 2017 15:11:24 -0700 (PDT) MIME-Version: 1.0 From: Andrew Chow Date: Fri, 18 Aug 2017 22:11:14 +0000 Message-ID: To: Bitcoin Protocol Discussion Content-Type: multipart/alternative; boundary="001a113ce1deebb6a305570e6817" Subject: [bitcoin-dev] [BIP Proposal] Partially Signed Bitcoin Transaction (PSBT) format X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Aug 2017 22:11:26 -0000 --001a113ce1deebb6a305570e6817 Content-Type: text/plain; charset="UTF-8" Hi everyone, I would like to propose a standard format for unsigned and partially signed transactions. ===Abstract=== This document proposes a binary transaction format which contains the information necessary for a signer to produce signatures for the transaction and holds the signatures for an input while the input does not have a complete set of signatures. The signer can be offline as all necessary information will be provided in the transaction. ===Motivation=== Creating unsigned or partially signed transactions to be passed around to multiple signers is currently implementation dependent, making it hard for people who use different wallet software from being able to easily do so. One of the goals of this document is to create a standard and extensible format that can be used between clients to allow people to pass around the same transaction to sign and combine their signatures. The format is also designed to be easily extended for future use which is harder to do with existing transaction formats. Signing transactions also requires users to have access to the UTXOs being spent. This transaction format will allow offline signers such as air-gapped wallets and hardware wallets to be able to sign transactions without needing direct access to the UTXO set and without risk of being defrauded. The full text can be found here: https://github.com/achow101/bips/blob/bip-psbt/bip-psbt.mediawiki Andrew Chow --001a113ce1deebb6a305570e6817 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi everyone,

I would like to propose a = standard format for unsigned and partially signed transactions.=C2=A0
=

=3D=3D=3DAbstract=3D=3D=3D

This document proposes a binary transaction format which contains the inf= ormation
necessary for a signer to produce signatures for the tra= nsaction and holds the
signatures for an input while the input do= es not have a complete set of signatures.
The signer can be offli= ne as all necessary information will be provided in the
transacti= on.

=3D=3D=3DMotivation=3D=3D=3D

Creating unsigned or partially signed transactions to be passed aro= und to multiple
signers is currently implementation dependent, ma= king it hard for people who use
different wallet software from be= ing able to easily do so. One of the goals of this
document is to= create a standard and extensible format that can be used between clients t= o allow
people to pass around the same transaction to sign and co= mbine their signatures. The
format is also designed to be easily = extended for future use which is harder to do
with existing trans= action formats.

Signing transactions also req= uires users to have access to the UTXOs being spent. This transaction=C2=A0=
format will allow offline signers such as air-gapped wallets and= hardware wallets
to be able to sign transactions without needing= direct access to the UTXO set and without
risk of being defraude= d.


Andrew Chow
--001a113ce1deebb6a305570e6817--