Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 99D5EB10 for ; Thu, 7 Sep 2017 18:00:31 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail149113.authsmtp.com (outmail149113.authsmtp.com [62.13.149.113]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id EBA9B8A for ; Thu, 7 Sep 2017 18:00:30 +0000 (UTC) Received: from mail-c245.authsmtp.com (mail-c245.authsmtp.com [62.13.128.245]) by punt23.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v87I0Nf6089024; Thu, 7 Sep 2017 19:00:23 +0100 (BST) Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com [52.5.185.120]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v87I0LEo055577 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 7 Sep 2017 19:00:22 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by petertodd.org (Postfix) with ESMTPSA id 13EE74012D; Thu, 7 Sep 2017 18:00:21 +0000 (UTC) Received: by localhost (Postfix, from userid 1000) id 74C12202B4; Thu, 7 Sep 2017 14:00:14 -0400 (EDT) Date: Thu, 7 Sep 2017 14:00:14 -0400 From: Peter Todd To: Jorge =?iso-8859-1?Q?Tim=F3n?= , Bitcoin Protocol Discussion Message-ID: <20170907180014.GA13727@fedora-23-dvm> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="NzB8fVQJ5HfG6fxh" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Server-Quench: 6b548a9a-93f6-11e7-801f-9cb654bb2504 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aAdMdgUUC1AEAgsB AmEbWl1eUF17W2A7 bghPaBtcak9QXgdq T0pMXVMcUg1veBx9 c0EeVxx3cAIIfX9z ZQhkDHVfVBVzJFt0 QRhSCGwHMGB9YGAe Bl1RJFFSdQcYLB1A alQxNiYHcQ5VPz4z GA41ejw8IwAXEwod WhsKNVUJSEJZViYm QBADFzQzVVADXD0+ KRAvIFoRVEEMLl0v LUBpRlMEM31aAwhZ AkdRVXcx X-Authentic-SMTP: 61633532353630.1039:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 52.5.185.120/25 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Status: No, score=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW autolearn=disabled version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] SF proposal: prohibit unspendable outputs with amount=0 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: Thu, 07 Sep 2017 18:00:31 -0000 --NzB8fVQJ5HfG6fxh Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 05, 2017 at 11:51:45PM +0200, Jorge Tim=F3n via bitcoin-dev wro= te: > This is not a priority, not very important either. > Right now it is possible to create 0-value outputs that are spendable > and thus stay in the utxo (potentially forever). Requiring at least 1 > satoshi per output doesn't really do much against a spam attack to the > utxo, but I think it would be slightly better than the current > situation. Given that this has a very minimal cost for spammers - just a single satosh= i - I don't think this is worth the risk of making future upgrades more complex= as other posters have brought up. Secondly, I think we have good reason to think that things like my own TXO commitments and Bram's related work will make UTXO growth a non-issue in the future. So, I'd NACK such a proposal myself. --=20 https://petertodd.org 'peter'[:-1]@petertodd.org --NzB8fVQJ5HfG6fxh Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZsYkuAAoJECSBQD2l8JH7fNYH/1DdSeNZ/jkjP85pL0r8Acep dMlJYbNFnLt5/OSMlZMi4HVxXqQnEwvGUs2YJPbZ1y3FJhXu0PJ10lGieKqOTsJZ AX5/nAVPw4F0rMY/Iilx71QuvFVUVWTo1L2+/IlYpu6CJyFm7Vagf2eX+qxwD7Eh TrRuAG0fldpWpgYttptt1DvkFkyQbuvXHdFRwJQArgb3jIcfzuHiAyjRCjxkozuy Q2pCJjSCOtUiaPxXpHLeGk9Lokmnv8rt4IMeQrYiHFTBkMfckJNX4O6oTfhvdOaW SW3817LuvwdK2e9HmT+QnXSN60bBgIXzqdRkYAJ8h4Tx5kcAJtsDbR4PuRN0a8Y= =tjtD -----END PGP SIGNATURE----- --NzB8fVQJ5HfG6fxh--