From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 1F776412 for ; Mon, 9 Jan 2017 02:09:12 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-qk0-f178.google.com (mail-qk0-f178.google.com [209.85.220.178]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id A8BE590 for ; Mon, 9 Jan 2017 02:09:11 +0000 (UTC) Received: by mail-qk0-f178.google.com with SMTP id 11so29298210qkl.3 for ; Sun, 08 Jan 2017 18:09:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-transfer-encoding; bh=o2c/H9b9er2RfUysmKP7OcV2mNCVKeKZ+vMBO5P7kzY=; b=WgQq8TDhOJS0OZtaqiEzp1P+UkkhZbqq0ZJcnkYi3tsLAwJR7pFC7XTZvbXEZhBSAR RMa7qxQszV8yHsjGhI5tU3U1FAYHZzyHUt1yr6UMdWEaRd/NubLUXM08wsWLJ7uwq6f8 crNtqwGxlpMFJBlScxByBdpYS2UvY+EGAw2kPP7IQT2C8A9mr0lfWW4rdfzn0bqSRsa6 ftzxkDpZGmBind80l99VarNm6o/vwtMFdG3cWxbcytKEcSaHZyQsvUE22bKrNuiGbKaH kUhjeGNImdnpS3V6AMc1H9Sv+pCDEj3C6ELFsWPagjQFIFjasnRap6lNOWof+1XNFSMi 3a2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding; bh=o2c/H9b9er2RfUysmKP7OcV2mNCVKeKZ+vMBO5P7kzY=; b=PSKdcwJA+0Hozlm44m5p6iI5Xhqn1xxBvuOvIw84p8pL2FVwftUpjXuz5mLZ4QowR3 HxHTecQW516IucKxz4ushDHuR9ovW4JiqmjP+onALnsznX+bW2YljwtaPYqtI+SgPeOL jrnUP2gzFecZfJtfq8MSJLyHP3+aHUQthoslEM20AKkC9LzY9GKGewUH5OYfVIPPOl/C 48VyBNo8nakiYF3elVtzC3iLgxexAese690025y22MFZ788uDIJfcW6I66WloSTXi16+ M925Rv3X57Ol7jCCUOBueyCkAQE4/e3QCrOIgTmI1UZRqSvlLMZvo1EB7/9hGzzy02Vu 2Iqg== X-Gm-Message-State: AIkVDXIvWJuayZIawDLXUS0J1bwQaxvrasxDP7vuiEkzqIvywP1mnj6wAg8QzNv8ixhgRg== X-Received: by 10.55.114.2 with SMTP id n2mr61943203qkc.318.1483927750738; Sun, 08 Jan 2017 18:09:10 -0800 (PST) Received: from ?IPv6:2601:18d:8181:e4d0:5c3e:2e5e:422f:1752? ([2601:18d:8181:e4d0:5c3e:2e5e:422f:1752]) by smtp.gmail.com with ESMTPSA id k26sm41159347qtc.36.2017.01.08.18.09.09 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 08 Jan 2017 18:09:10 -0800 (PST) To: Bitcoin Protocol Discussion From: Chris Message-ID: <8c64f5db-7cac-3fde-85c0-a75d752c4192@gmail.com> Date: Sun, 8 Jan 2017 21:09:09 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, RCVD_IN_SORBS_SPAM 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] Mutli-push op_return 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: Mon, 09 Jan 2017 02:09:12 -0000 Would there be an objection to making op_return outputs with two pushdatas standard (same max data size)? Use case is mostly tagging transactions so they can be returned by bloom filtering nodes: OP_RETURN Since bip37 nodes test each data element in each output script (which I believe applies to op_return as well?) it provides a lightweight way of fetching transactions where the tag matches a specific pattern. It appears a sizable number of nodes/miners already accept such transactions as this one was mined in the first block... https://blockchain.info/tx/400b4738f1e4eab4062e085623b9a3a71670f5c0d42e32= dbe5a4e71da5baabe0 - Chris