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 6207942B for ; Tue, 13 Feb 2018 03:26:59 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail3.protonmail.ch (mail3.protonmail.ch [185.70.40.25]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 5CEC7477 for ; Tue, 13 Feb 2018 03:26:58 +0000 (UTC) Date: Mon, 12 Feb 2018 22:26:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=default; t=1518492415; bh=wOdA4Ha/wNhfgVYRq6kXFLDjEgrI1I47Nmka26JPoUE=; h=Date:To:From:Cc:Reply-To:Subject:In-Reply-To:References: Feedback-ID:From; b=t6bC3c/bQyuEmZHEbyPLqx7W7SDGFW0E/gxqYoTaxcLMcgNmPHwwszGr1GcRnAwhb JwoA2DOq6194hjH+9tOpun/C9dPS08gvyTNcIyYJoR2qBksJIRfGr8GrEH/ta1y9j8 kzQMs2bXz/4erIBYn4NLEZZJJlqFJciA0IaMIp5w= To: Helder Garcia From: ZmnSCPxj Reply-To: ZmnSCPxj Message-ID: In-Reply-To: <6EAA8D06-3A20-4BBA-BE2E-95B42BCCE7D3@gmail.com> References: <6EAA8D06-3A20-4BBA-BE2E-95B42BCCE7D3@gmail.com> Feedback-ID: el4j0RWPRERue64lIQeq9Y2FP-mdB86tFqjmrJyEPR9VAtMovPEo9tvgA0CrTsSHJeeyPXqnoAu6DN-R04uJUg==:Ext:ProtonMail MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, FROM_LOCAL_NOVOWEL, 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 X-Mailman-Approved-At: Tue, 13 Feb 2018 03:29:37 +0000 Cc: "bitcoin-dev@lists.linuxfoundation.org" Subject: Re: [bitcoin-dev] BIP0008 clarification 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: Tue, 13 Feb 2018 03:26:59 -0000 Good morning Helder, >Hi, > > I=E2=80=99m trying to understand the process of signalling and activation= of updates in bitcoin. Following BIP34, BIP9, I got into BIP8. > In my understanding of what I read there, an update will be activated eve= n if the threshold of 95% signalling is not reached in STARTED state, as so= on as blockchain height is equal or higher than timeout_height. > Is my understanding correct? If so, isn=E2=80=99t it a risk to activate a= change even if you don=E2=80=99t have the majority of hash power accepting= it? Assuming the update is widespread among economic actors, only miners who do= not follow the more stringent rules of the update will suffer, as their bl= ocks will have a high probability of not following those rules and thus wil= l be implicitly rejected by economic actors. Rational miners who follow th= e update, no matter how small their hash power share, would prefer the chai= n that economic actors will accept as real and would build only on blocks t= hat follow updated rules strictly. Indeed, the time from STARTED to ACTIVE simply serves to let miners upgrade= their software, as a concession that in the real world we cannot safely de= ploy new software in a single day. Regards, ZmnSCPxj