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 3502EEA1 for ; Sun, 13 Dec 2015 08:18:58 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-ig0-f177.google.com (mail-ig0-f177.google.com [209.85.213.177]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id A05D9EC for ; Sun, 13 Dec 2015 08:18:57 +0000 (UTC) Received: by igbxm8 with SMTP id xm8so65220499igb.1 for ; Sun, 13 Dec 2015 00:18:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=cby4Xrs7kSkxI0aKyn36YY1Y0U9pzebWcmtIzTUz3hs=; b=jJB9MZ94iSUvPHVnsXfazVdtzH1BSS/wCiugiYUJSR6nQ+PlfSI6dETiALTMXPq9tK sbnPFRO0IwJqnN69G6PQ4ldntTME8jjO0NaQNVjAbs1xZSpSarz1KoSEQ3mxcx5NFIv0 z3/pRQ5YKbFUHgf5QfnBjAm2Dr9uB0jMVNZKRmskO47cl6zC/g0eAskmFtCJK52vurL/ +E5d655Ze7lBKa8nNm8qqAbyjlwP+nWs2lHBuWVCkhJk7w05cK5yDzWFnLcsqx5vW6l5 adDxuSi/PY7vwNve+tPQSLdZRLynqmNQDoCmDJOFtQf6FIFxBnPRT7YwZCK+S1qPhKnv aUTA== MIME-Version: 1.0 X-Received: by 10.50.61.204 with SMTP id s12mr386198igr.66.1449994737140; Sun, 13 Dec 2015 00:18:57 -0800 (PST) Sender: gmaxwell@gmail.com Received: by 10.107.192.70 with HTTP; Sun, 13 Dec 2015 00:18:57 -0800 (PST) In-Reply-To: References: <50e629572d8de852eb789d50b34da308@xbt.hk> <1449961269.2210.5.camel@yahoo.com> Date: Sun, 13 Dec 2015 08:18:57 +0000 X-Google-Sender-Auth: wHio7uVD-QqS4KlJzb70vY4S4pI Message-ID: From: Gregory Maxwell To: Chris Priest Content-Type: text/plain; charset=UTF-8 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, 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] Forget dormant UTXOs without confiscating bitcoin 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: Sun, 13 Dec 2015 08:18:58 -0000 On Sun, Dec 13, 2015 at 8:13 AM, Chris Priest wrote: > Lets say it's 2050 and I want to sweep a paper wallet I created in > 2013. I can't just make the TX and send it to the network, I have to > first contact an "archive node" to get the UTXO data in order to make > the TX. How is this better than how the system works today? You already are in that boat. If your paper wallet has only the private key (as 100% of them do today). You'll have no idea what coins have been assigned to it, or what their TXids are. You'll need to contact a public index (which isn't a service existing nodes provide) or synchronize the full blockchain history to find it. Both are also sufficient for jl2012's (/Petertodd's STXO), they'd only be providing you with somewhat more data. If instead, you insist that you'd already be running a full node and not have to wait for the sync, then again you'd also be your own archive. In none of these cases do you lose anything.