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(8.15.2/8.15.2) with ESMTP id w7FLkMUG096093; Wed, 15 Aug 2018 22:46:22 +0100 (BST) (envelope-from pete@petertodd.org) Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com [52.5.185.120]) (authenticated bits=0) by mail.authsmtp.com (8.15.2/8.15.2) with ESMTPSA id w7FLkK80006011 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 15 Aug 2018 22:46:21 +0100 (BST) (envelope-from pete@petertodd.org) Received: from [127.0.0.1] (localhost [127.0.0.1]) by petertodd.org (Postfix) with ESMTPSA id 404D740007; Wed, 15 Aug 2018 21:46:20 +0000 (UTC) Date: Wed, 15 Aug 2018 21:46:18 +0000 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Autocrypt: addr=pete@petertodd.org; keydata=mQENBE+Xo6MBCACpPhm2zLk6G65vB8Of G04VyBus9Ht9jHhI0rMQ6Orai9luo0FbCPZGljnpi9GSrm6nG15aDtG84cjTVatJ3wmoAPDmcq/Q PTaeEAY28us9QN4Fsqw0emJqiaQez9pd/5BYtOSG8vLZpAxXfnOgDH/YK6u9WdoX7/RgTAltcoGa zmyJHZHjVzB5OoZzakuWDALdHAw40i3RO5KpjS+BetQPRH0nV8dW/56aZWFk8scIhhMWTEFM5GZ2 d0qz4lyfxqoGdpsDYqh9iakWz8ppFy19BC/XYxQhAaGb4abdQlw/CZ0ShWzW1RnlLJpAp7cC31mR 541x+EJjPW9o9+JrUBlVABEBAAG0H1BldGVyIFRvZGQgPHBldGVAcGV0ZXJ0b2RkLm9yZz6JAZkE EwEIAIMCGwMCHgECF4BeFIAAAAAAFQBAYmxvY2toYXNoQGJpdGNvaW4ub3JnMDAwMDAwMDAwMDAw MDAwMDExZDlmNjkzMWU2NWY4MTRjNmYzYjIyMTczNmIwYzQ1ZjI1ZTAzNjVhM2QxNTZmYQULCQgH AwUVCAoJCwIWAAUCWcs3RwUJDBTHEAAKCRB/qxFCZ+T6BLuQB/9rNzkX9+tFAHg5o+e0LIqQe26d KhZQiB5GF6uJKiDGzna8HeZqg83diIpjo4it6espMLDpwE5nKhlBFyAnZZBF44u/5+Y6Ilu4qDAF S8vBQ1ls86a+Ai+q4ZArLaPnuQOwB4eTg8xc8SgUv+8oRHnoti4RCGQZuh1AkYU+w9tV03C1HKww i9Ennv95kb49M+71wLJYuqCMiyLQ9NDtoLpxugqXhmWu9XZL+sS1ecb6xnxoxrM1FW7LkBw4XQxF aEuHowv26KNGkINRjrfLKOZM988+c2E/wmYlbzi7Ondjw/92ooWRH+aHY3mnI1Ij4Fy0DFL6xwys AtNBbzefoZyzuQENBE+Xo6MBCADB0197HdK48SqvipyPB49vlzfP6KHfcACZCg1JTqOt8KRJFwTP 3PTi/GJuUvt4io1UVG29+3e2X8eDbrxufP0YPr+0IbTE/EMgXizNN28Zf/VIR7bEv9oFXfn/4L3B 2L8rf61vw/W/u2b+z6MROC1qgWg3nOG6FwgiEeiBTlaLWhuwqgIdp6mdoOled50ym409o5kD6nXM 0MkqLOTMJTKwrYipoo0D0acLtiBLzxXdYgrqxT30eIxvMdkaj3mC5mNd7pHYSf3jQ7/BWAVkccRm 3o2e5F8oDEe6dkWYODjbKAAKkn2B9GoHsROaqeYdANd5VNiFJIzGWTCGkN8GjNEVABEBAAGJASUE GAECAA8CGwwFAlTbOU4FCQ6plyMACgkQf6sRQmfk+gQO4gf/QpBTrZWPm1XOk8/gdnNqb2feqnRO AQRqtIOxAlsETDAQdP2HlU9mTeJuJ0YfzrFjTAGKj3fw9YNnynu32BZVD2ueIhGg8bWyhIrJtMYB wSKQ5/hojGlzU91qXd/VAxTsOmeIXgYyL7siRhNRCyHYZevRHZ8GLJ7XklYxRAj8o2dtO/wmhUTx jax5GRMhMkJUtOhjhPqmAfE+l7HF/TD/CCWyL5Uj2ILeWHSetSOlAqFj0ApcDvZlJtHMmfAiCjGY 0FSxNcaOYb2aUKrC7LnsfnvAPxd5XZS7LPuLmZ+GGm+kmxuIh8a0xykxw2eCGCnlWVgnZUCMYrUd Wy93HBYT8g== To: =?ISO-8859-1?Q?Jorge_Tim=F3n?= , Bitcoin Protocol Discussion , =?ISO-8859-1?Q?Jorge_Tim=F3n_via_bitcoin-dev?= , Christopher Allen From: Peter Todd Message-ID: <367FF84A-219E-4735-B9F7-09CEFEB20587@petertodd.org> X-Server-Quench: a6629720-a0d4-11e8-8e1a-9cb654bb2504 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdwcUGUATAgsB Am4bWVZeVFt7W2I7 bghPaBtcak9QXgdq T0pMXVMcUwIefUd6 Dh4eUh9ydgQIeX9x ZE4sD3ZdXk19d0Zg E04AEXAHZDJodWhK URFFflAGdgZOLE1H b1B7GhFYa3VsNCMk FAgyOXU9MCtqYA9R SwAILFQdCU8NVhkE cCovIQgVOwU9XSg9 LgxO 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=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] Claiming an OP_RETURN Prefix 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, 15 Aug 2018 21:46:26 -0000 On August 15, 2018 8:33:43 PM UTC, "Jorge Tim=C3=B3n via bitcoin-dev" wrote: >op_return outputs can be pruned because they are not spendable=2E >putting a hash on in the witness script data won't make things better >(it would actually make them worse) and it definitely doesn't help >"block size bloat"=2E >I think I'm missing some context, but if you're using op_return purely >for timestamping I would recommend using pay 2 contract instead=2E If you're *actually* just doing timestamping you're better off using OpenT= imestamps=2E But many times people think they're just doing timestamping in= reality mere timestamps are insufficient for the task=2E Notably, this is something the Satoshi Bitcoin white paper gets wrong, inc= orrectly describing Bitcoin as a timestamping system: timestamping is insuf= ficient to prevent double-spends=2E --=20 https://petertodd=2Eorg 'peter'[:-1]@petertodd=2Eorg