Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id A3713360 for ; Sat, 8 Apr 2017 18:27:25 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id D7B96144 for ; Sat, 8 Apr 2017 18:27:21 +0000 (UTC) Received: by mail-wm0-f41.google.com with SMTP id u2so12034860wmu.0 for ; Sat, 08 Apr 2017 11:27:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=thinlink-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=5+/V/Z+gqKHMFNii+5cej7RnVbPlBNCApuxaT3isqUM=; b=GF45RAZADvqt9DVsa6/s2S4WDznwbCpY2VvjRvgOJ6zLqIUkpaCFJXEwATrmCakFvt DYED+W/v2MoLxRfKOXCJlPsLy3ZXO3kBJknKs7zLUgGUzXQ517SG8fQzDO5UlopQh5ex riuiHBFpfmfPx0FhaMgT9NOChwi1fdrBJSxYz6cdVJuZdmQpov4KX349RlZJ47EqNm9C JQjS38DGcR5n8w/jyXbX7EzaX5hmn5h1nMM8A7p/KDZ4mMeCQlH0vap/rr3QVev3XBO/ n7Apg4g31m0MLhFuPfG9M1psb8ERDN+Q85uXpoGEJnlX+981LldnAq8fopHGFVNOiUIZ oU5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=5+/V/Z+gqKHMFNii+5cej7RnVbPlBNCApuxaT3isqUM=; b=XXzqOPXnutH+wXyZZTaWs8FP+rQ3AVhVrNNnnQ16eZH7WT/TXdCpD9fVPsq7KeFb9W PqXFjRPCkW/dSI+v3ifPAgJkkBwNIb4l73z/J410n0xH9GY3dKfBDD9vQQ49TafktwTf d9zHZvqOG1ejpN1dhGKAfXfN0+HD4t1K9B5w+4lGxw1oWIwjaYDWZnC6bGcEA/YnW5WC RmzFX/1IE5kpOkv5zcA+R5yqgE/SZb9eZcev3dSOQS2cig/VFUt+hoVNYVatM+++xrDH Ei1hI7m1mg6Tcow74Hb3rPbrshOV+UOXYZNrk/jfBjcr9t6gB3WypmPSMw2rc1neHPY1 CLsQ== X-Gm-Message-State: AN3rC/7YyxpHEkr/AWny/j18sXRkRzpxSIaZL8a4s3/RbCALjr47EytA Qqh29Rcc63uKm2bPlQOvlVFO5fllNvJ8 X-Received: by 10.28.18.207 with SMTP id 198mr4326795wms.133.1491676040510; Sat, 08 Apr 2017 11:27:20 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.15.80 with HTTP; Sat, 8 Apr 2017 11:27:19 -0700 (PDT) Received: by 10.28.15.80 with HTTP; Sat, 8 Apr 2017 11:27:19 -0700 (PDT) In-Reply-To: References: <1491516747.3791700.936828232.69F82904@webmail.messagingengine.com> <1491526132.723002.936945760.06A943C6@webmail.messagingengine.com> <1491528547.734012.936970328.62366FA5@webmail.messagingengine.com> From: Tom Harding Date: Sat, 8 Apr 2017 11:27:19 -0700 Message-ID: To: Gregory Maxwell Content-Type: multipart/alternative; boundary=001a1145b92883da9b054cabe4a2 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HTML_MESSAGE, 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: Sat, 08 Apr 2017 18:31:26 +0000 Cc: Bitcoin Dev Subject: Re: [bitcoin-dev] Using a storage engine without UTXO-index 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: Sat, 08 Apr 2017 18:27:25 -0000 --001a1145b92883da9b054cabe4a2 Content-Type: text/plain; charset=UTF-8 On Apr 7, 2017 12:42, "Gregory Maxwell" wrote: On Fri, Apr 7, 2017 at 6:52 PM, Tom Harding via bitcoin-dev wrote: > A network in which many nodes maintain a transaction index also enables a > class of light node applications that ask peers to prove existence and > spentness of TXO's. Only with the additional commitment structure such as those proposed by Peter Todd in his stxo/txo commitment designs, e.g. https://petertodd.org/2016/delayed-txo-commitments Light nodes are improved by detecting invalid transactions, even before they are mined. --001a1145b92883da9b054cabe4a2 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Apr 7, 2017 12:42, "Gregory Maxwell" <greg@xiph.org> wrote:
=
On Fri, Apr 7, 2017 at = 6:52 PM, Tom Harding via bitcoin-dev
<bitcoin-dev@li= sts.linuxfoundation.org> wrote:
> A network in which many nodes maintain a transaction index also enable= s a
> class of light node applications that ask peers to prove existence and=
> spentness of TXO's.

Only with the additional commitment structure such as those proposed<= br> by Peter Todd in his stxo/txo commitment designs, e.g.
https://petertodd.org/2016/delayed-txo-commit= ments

= Light nodes are improved by detecting invalid transactions, even before the= y are mined.
--001a1145b92883da9b054cabe4a2--