Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 57194EC0 for ; Wed, 24 Jan 2018 11:35:51 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-ua0-f175.google.com (mail-ua0-f175.google.com [209.85.217.175]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id D5879EC for ; Wed, 24 Jan 2018 11:35:50 +0000 (UTC) Received: by mail-ua0-f175.google.com with SMTP id e18so2473525ual.6 for ; Wed, 24 Jan 2018 03:35:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=h2YhmiJy7MgpNvmVrIs65gG0bwWMT4Rc0eR65zdL934=; b=BwU3ULb8+J2ktWceg8LRy9XrJjhSLGWSAbMEoB9E0nE8CjdcfWizx/eBNeyCSA/bWN eOXXX4VHUY7r8ZDno29rMgqFJz+TJlewdN28keC5Atbf+kpMGIJij83wtD7OSE1vyjnO Xx5OE3fvJh6ciGnXewRBsATJNntYK66TjWWqtLxaIsN8NE44bBihUsZucq+6m32lPHNg iqxHVIV+/yK9wrisbEihNUSwD06H5Mr9EnmLuK9A5mU/M+OX+ckf0uP3uqXJ+NNMAdvk Q29JgFARouBHSrHoBWB5V41BlPyBUbbplhyPs1x8Hkf7n34XQGC68nf+rVk+lOURBsFE sdTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=h2YhmiJy7MgpNvmVrIs65gG0bwWMT4Rc0eR65zdL934=; b=C2HX92OFvWoLNWjngGTQXZHHXiO3rGVj8flRkNvs7ptqGhiJGIBg3xOFU0EzQQ/oKP pHiXHk0FGnA//r0upLxC8wFApl7Q+PBN2jcHD3pbcWyPCKd6f1Cr1t/v7bpQ+RqWb0OR yIREzP3TX1AU5uH6BvoXBFTyyvpha81ZIRoPyTK3yZdo8uJr8UwvIrnHU84fiXKeTmvO 8sdTNyEkYRfb2E+wRCPO3l4YcGAFdU/H1bz9u2emWcEdggOLHTGm2wtzttety76YtUi4 UVTsWJKK5w7vFAy8GoAijkB1/QIHUp9YdGAtqzMApjLThCLjaVM681gu9UkquHtXfxo7 XWzw== X-Gm-Message-State: AKwxytdXZeCKiSSZNvysS3ITzQyXS18VhfqNWe0VgyEOCishb2BRi4F5 6HbCW/qzOQhwfe1sjMfUB3ResbnIcrxfwQnA6tI= X-Google-Smtp-Source: AH8x227EXcKPIjxB7rDR9OEJYQf4RXZ0fooRqEQtutesDo+qF/lIEYzWhoFHzSBB4k0sTIocztrFjErG3nCv2xK9XXc= X-Received: by 10.159.53.240 with SMTP id u45mr4226922uad.18.1516793750034; Wed, 24 Jan 2018 03:35:50 -0800 (PST) MIME-Version: 1.0 Sender: gmaxwell@gmail.com Received: by 10.103.78.155 with HTTP; Wed, 24 Jan 2018 03:35:49 -0800 (PST) In-Reply-To: References: <41d8ff42-106f-45b9-cc70-507982c7336b@gmail.com> From: Gregory Maxwell Date: Wed, 24 Jan 2018 11:35:49 +0000 X-Google-Sender-Auth: f89aXWlRvgxFvlfaxOyQwUEFieQ Message-ID: To: Aymeric Vitte Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM, 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 Cc: Bitcoin Protocol Discussion , =?UTF-8?B?0JDRgNGC0ZHQvCDQm9C40YLQstC40L3QvtCy0LjRhw==?= Subject: Re: [bitcoin-dev] Why is deriving public key from the signature not used in Segwit? 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: Wed, 24 Jan 2018 11:35:51 -0000 On Wed, Jan 24, 2018 at 11:16 AM, Aymeric Vitte wrote: > Then what about > https://blockchain.info/tx/226a8b08dc46a00e9ecec5567a303a0b354bef3c1674476eb5e4b627b2ace493?format=hex > ? > > Scriptsig: > > 473044022057a1234709270325e7215200f982546304cf465971cbd55d54231ead54ef1a7802207a82e93ef2b0f87188abe87bccb67ee9d5c650b1b58948e5b1c80ba1b4c43dc301 > > No pubkey... Because the pubkey is in the scriptPubKey of vout 0 of 40872a376e98a1f8b285827c2ad8c5b3eec7d779d752dc3a4adda5d9bb70f3b5 which it is spending.