Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id B7ACDDDB for ; Fri, 28 Aug 2015 22:24:04 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-qg0-f43.google.com (mail-qg0-f43.google.com [209.85.192.43]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 29AAA14C for ; Fri, 28 Aug 2015 22:24:04 +0000 (UTC) Received: by qgi69 with SMTP id 69so8755932qgi.1 for ; Fri, 28 Aug 2015 15:24:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=TtwEnt+JTt/169IAW5vj6r3z/2TxX7VPVj3weyYHXYc=; b=bwdtDc/eyG+c2xe98g1vlY+CYO6soE2rU7H3R0lZekEzn9x854gfqzaB0dhUz28JEg bPMty8z42CZ4hTKWGrXYDi5G+zKD41cT5+pKUZT+w9BMfNkSicjbBJi+U/t5B1GbFEo7 gvdNbL4Q/yumCczKTKrT2fjodbTeZEoaZuyaj3HtqDoMga0sH+nDV5Co5GvwIqdlyaY1 2Okjq0h3m03/CfvdGcHnZSM0wjZDSKGHC4hKg7v0xDBnRte7w6NR1gYG8s4oWgTv/J9G y0qicfJUf4dC81mz0aAWRDPYQ2kgfzy2vVJDSrOTV22DZFAqwoF4KAdAa4LWek8cDNrr njJQ== X-Received: by 10.140.152.144 with SMTP id 138mr21408530qhy.19.1440800643240; Fri, 28 Aug 2015 15:24:03 -0700 (PDT) Received: from [192.168.0.12] (c-24-91-28-148.hsd1.ma.comcast.net. [24.91.28.148]) by smtp.gmail.com with ESMTPSA id s89sm4272459qks.36.2015.08.28.15.24.02 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 28 Aug 2015 15:24:02 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (1.0) From: Gavin X-Mailer: iPhone Mail (12F70) In-Reply-To: <2081355.cHxjDEpgpW@crushinator> Date: Fri, 28 Aug 2015 18:24:01 -0400 Content-Transfer-Encoding: quoted-printable Message-Id: References: <2081355.cHxjDEpgpW@crushinator> To: Matt Whitlock X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, MIME_QP_LONG_LINE, 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 Cc: "bitcoin-dev@lists.linuxfoundation.org" Subject: Re: [bitcoin-dev] Consensus based block size retargeting algorithm (draft) X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Aug 2015 22:24:04 -0000 With this proposal, how much would it cost a miner to include an 'extra' 500= -byte transaction if the average block size is 900K and it costs the miner 2= 0BTC in electricity/capital/etc to mine a block? If my understanding of the proposal is correct, it is: 500/900000 * 20 =3D 0.11111 BTC ... Or $2.50 at today's exchange rate. That seems excessive. -- Gavin Andresen > On Aug 28, 2015, at 5:15 PM, Matt Whitlock via bitcoin-dev wrote: >=20 > This is the best proposal I've seen yet. Allow me to summarize: >=20 > =E2=80=A2 It addresses the problem, in Jeff Garzik's BIP 100, of miners se= lling their block-size votes. > =E2=80=A2 It addresses the problem, in Gavin Andresen's BIP 101, of blindl= y trying to predict future market needs versus future technological capaciti= es. > =E2=80=A2 It avoids a large step discontinuity in the block-size limit by s= tarting with a 1-MB limit. > =E2=80=A2 It throttles changes to =C2=B110% every 2016 blocks. > =E2=80=A2 It imposes a tangible cost (higher difficulty) on miners who vot= e to raise the block-size limit. > =E2=80=A2 It avoids incentivizing miners to vote to lower the block-size l= imit. >=20 > However, this proposal currently fails to answer a very important question= : >=20 > =E2=80=A2 What is the mechanism for activation of the new consensus rule? I= t is when a certain percentage of the blocks mined in a 2016-block retargeti= ng period contain valid block-size votes? >=20 >=20 > https://github.com/btcdrak/bips/blob/bip-cbbsra/bip-cbbrsa.mediawiki >=20 >=20 >> On Friday, 28 August 2015, at 9:28 pm, Btc Drak via bitcoin-dev wrote: >> Pull request: https://github.com/bitcoin/bips/pull/187 > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev