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 88ABF8F5 for ; Wed, 19 Aug 2015 12:16:10 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-lb0-f172.google.com (mail-lb0-f172.google.com [209.85.217.172]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id E6E85106 for ; Wed, 19 Aug 2015 12:16:09 +0000 (UTC) Received: by lbbsx3 with SMTP id sx3so1855032lbb.0 for ; Wed, 19 Aug 2015 05:16:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=kPTWoW1Or3pMZXhpjlLC/vMOCMMadJUOpMZQ3J/lxVk=; b=wFZzOOOfgaW5OItZQERPkANszejEQAa/aavJF7l8xej3QwKYxcAhYVwUCQh/4kjXQY QNp/63hIbI6fGudWgqltcqsAVGxoq/lYay17TVJ/DqfOFBcTPutWHVv40yzeChg3f5If vJUQA5TVDt3FdWkgfbytjDDUHO8MoMccU43RydRKfRCa+6Rg3PeWoQcfaNjI7V6yCXyy PlKpo4LQ65MzsraAzryYZ7cYqLD6QQfqP3mXvIw4eZrZdB+9AZe8CJEk3OFGLabIPghx hnuxH1m6TUze7wpNa2SM64wypR83x4R33oPckVxyXg9oNotTTInq8JrE3mpd53ThAIQQ BwkA== X-Received: by 10.152.219.172 with SMTP id pp12mr10991159lac.17.1439986568394; Wed, 19 Aug 2015 05:16:08 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.22.25 with HTTP; Wed, 19 Aug 2015 05:15:48 -0700 (PDT) In-Reply-To: References: From: Hector Chu Date: Wed, 19 Aug 2015 13:15:48 +0100 Message-ID: To: Jameson Lopp Content-Type: text/plain; charset=UTF-8 X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, 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 Subject: Re: [bitcoin-dev] A solution to increase the incentive of running a node 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: Wed, 19 Aug 2015 12:16:10 -0000 On 19 August 2015 at 13:08, Jameson Lopp wrote: > If operating as an SPV node then it can check the transactions by querying > other nodes. SPV is for checking validity of transactions that have already entered the blockchain, as I understand it. My proposal requires nodes to validate transactions that are unconfirmed, and to commit to the validation by doing a POW on it. > On an unrelated note, it sounds like your proposal will significantly > increase the data size of every transaction, which will create even more > contention for block space. If we stipulate that the coinbase fields only hold space for a single pubkey, then the entire block header including the two coinbases should only take an extra 100 bytes or so. Transactions are already routinely 250 bytes+. So an increase of roughly 33%.