Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id B0EB9CF6 for ; Fri, 23 Sep 2016 09:57:10 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from zinan.dashjr.org (unknown [192.3.11.21]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 47792118 for ; Fri, 23 Sep 2016 09:57:10 +0000 (UTC) Received: from ishibashi.localnet (unknown [IPv6:2001:470:5:265:61b6:56a6:b03d:28d6]) (Authenticated sender: luke-jr) by zinan.dashjr.org (Postfix) with ESMTPSA id 921DF38AB898 for ; Fri, 23 Sep 2016 09:57:04 +0000 (UTC) X-Hashcash: 1:25:160923:bitcoin-dev@lists.linuxfoundation.org::j/RPg6+oZQlnQZzt:X8N6 From: Luke Dashjr To: Bitcoin Protocol Discussion Date: Fri, 23 Sep 2016 09:57:01 +0000 User-Agent: KMail/1.13.7 (Linux/4.4.21-gentoo; KDE/4.14.24; x86_64; ; ) X-PGP-Key-Fingerprint: E463 A93F 5F31 17EE DE6C 7316 BD02 9424 21F4 889F X-PGP-Key-ID: BD02942421F4889F X-PGP-Keyserver: hkp://pgp.mit.edu MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201609230957.03138.luke@dashjr.org> X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,RDNS_DYNAMIC autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: [bitcoin-dev] BIP draft: OP_CHECKBLOCKATHEIGHT 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, 23 Sep 2016 09:57:10 -0000 This BIP describes a new opcode (OP_CHECKBLOCKATHEIGHT) for the Bitcoin scripting system to address reissuing bitcoin transactions when the coins they spend have been conflicted/double-spent. https://github.com/luke-jr/bips/blob/bip-cbah/bip-cbah.mediawiki Does this seem like a good idea/approach? Luke