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| author | Tier Nolan <tier.nolan@gmail.com> | 2015-08-19 19:17:15 +0100 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2015-08-19 18:17:17 +0000 |
| commit | 86cd69b43e80c84b50f53a79e04a81a576ffe282 (patch) | |
| tree | 931960ed4710b54e82389196857e42cd6413a5f3 /49 | |
| parent | de8b8d87b886d69ee6faff64a802b74783e9f972 (diff) | |
| download | pi-bitcoindev-86cd69b43e80c84b50f53a79e04a81a576ffe282.tar.gz pi-bitcoindev-86cd69b43e80c84b50f53a79e04a81a576ffe282.zip | |
Re: [bitcoin-dev] CLTV/CSV/etc. deployment considerations due to XT/Not-BitcoinXT miners
Diffstat (limited to '49')
| -rw-r--r-- | 49/5666ab6667f435ea84f44fb656922da2a4b568 | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/49/5666ab6667f435ea84f44fb656922da2a4b568 b/49/5666ab6667f435ea84f44fb656922da2a4b568 new file mode 100644 index 000000000..d67c1eb22 --- /dev/null +++ b/49/5666ab6667f435ea84f44fb656922da2a4b568 @@ -0,0 +1,128 @@ +Return-Path: <tier.nolan@gmail.com> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id BDABA8E8 + for <bitcoin-dev@lists.linuxfoundation.org>; + Wed, 19 Aug 2015 18:17:17 +0000 (UTC) +X-Greylist: whitelisted by SQLgrey-1.7.6 +Received: from mail-qk0-f182.google.com (mail-qk0-f182.google.com + [209.85.220.182]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 52FB4102 + for <bitcoin-dev@lists.linuxfoundation.org>; + Wed, 19 Aug 2015 18:17:17 +0000 (UTC) +Received: by qkfh127 with SMTP id h127so5263957qkf.1 + for <bitcoin-dev@lists.linuxfoundation.org>; + Wed, 19 Aug 2015 11:17:15 -0700 (PDT) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; + h=mime-version:in-reply-to:references:date:message-id:subject:from:to + :cc:content-type; + bh=JZl4DTB17RXnMg0vtUWCOD4e0pB9vpMLU7QFcVUeqBg=; + b=xO7NHVoqMysu3n9fF73w3BPuGM9bpEjLa10TqJDAjSFqi9kR+BPjBDk106TnrqiB07 + RoOTzyhZ5vUdRrXeNarjwS2AdU+cBBmDWfvfD+hlzXh27Nc8b98g/jy1frSNqSNsaJXH + 2qywv8M0nUwLSDKJPa6CWjHpmWhBpyTmRxx/t2hDaIum7quj4sM4/KQt8eXo0KuOsSUN + WR9A6g/Xzj9PwlmqI3OAbL/+qKoxma57FOgCcWvfScSL37TFOAdWmkf259sNTlKcwBnS + F47Z1//mjqnMpkVYiUI8KfU7HZ9PD3yz12s8m3gvm6eZDCJiu0W2mPzeNl+IK9dQg0J+ + oZGQ== +MIME-Version: 1.0 +X-Received: by 10.55.215.144 with SMTP id t16mr25057008qkt.107.1440008235703; + Wed, 19 Aug 2015 11:17:15 -0700 (PDT) +Received: by 10.140.31.181 with HTTP; Wed, 19 Aug 2015 11:17:15 -0700 (PDT) +In-Reply-To: <CADJgMzsvAfJnW1DDD6t3qkBcQRLb4HMqG27k51LhXJqxC6-z4g@mail.gmail.com> +References: <20150819055036.GA19595@muck> + <CAOG=w-unJ+xnWFgiBO3jmgj4Q72ZH6-LOn08TwUF58trc-_WWg@mail.gmail.com> + <CABm2gDpBLKxKbHyWocOuyfO1VZ45yM7U1t+zVL_13LP9veXmcA@mail.gmail.com> + <CADJgMztmgUzy70sJ+_Xj-OFe-kvEi6eSAYoGTb4yg-yGQ9u1dw@mail.gmail.com> + <CABm2gDqRycGY2diXoTvL+d5JE0EgccgGdiQdgWj8c_9SMokJEw@mail.gmail.com> + <CADJgMztysqVya1nnRatyav5rqcpEZ81CmXxW0ZqwJoLN7W2=hg@mail.gmail.com> + <CAE-z3OVAJcnFn21F9QTGCf=NZrLQ9hAtj_tqSCboQGCfFSvq=Q@mail.gmail.com> + <CADJgMzsvAfJnW1DDD6t3qkBcQRLb4HMqG27k51LhXJqxC6-z4g@mail.gmail.com> +Date: Wed, 19 Aug 2015 19:17:15 +0100 +Message-ID: <CAE-z3OV=sEd18JY1raVf5j9XTnEZ+vovkuQw57V9UoSXh6Affw@mail.gmail.com> +From: Tier Nolan <tier.nolan@gmail.com> +To: Btc Drak <btcdrak@gmail.com> +Content-Type: multipart/alternative; boundary=001a114661985ce5bc051dae0b0e +X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,HTML_MESSAGE,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 <bitcoin-dev@lists.linuxfoundation.org> +Subject: Re: [bitcoin-dev] CLTV/CSV/etc. deployment considerations due to + XT/Not-BitcoinXT miners +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Wed, 19 Aug 2015 18:17:17 -0000 + +--001a114661985ce5bc051dae0b0e +Content-Type: text/plain; charset=UTF-8 + +On Wed, Aug 19, 2015 at 6:25 PM, Btc Drak <btcdrak@gmail.com> wrote: + +> In our case for Bitcoin Core, option 2 we use nVersion=8, apply a +> bitmask of 0xdffffff8 thus: +> +> if ((block.nVersion & ~0x20000007) >= 4 && +> CBlockIndex::IsSuperMajority(...)) { //...} +> +> With nVersion=8, but using comparison >=4 allows us to recover the +> bit later, assuming we want it (otherwise we use version >=8). +> + +That is the 75% "activation" rule portion? The 95% rule has to apply to +all blocks. + +The supermajority applies to unmasked blocks? + +I think you want it so that a sequence of blocks with version 8 can be +followed by version 4 blocks? + +If 950 of the last 1000 blocks have bit 0x08 set, then reject any block +with a version less than 4. + +This means transitioning to the version bits BIP just requires dropping the +version back to 4 and adding a rule enforcing the BIPs for version 4 and +higher blocks. + +This would be part of the version bits BIP enforcement. + +--001a114661985ce5bc051dae0b0e +Content-Type: text/html; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable + +<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On W= +ed, Aug 19, 2015 at 6:25 PM, Btc Drak <span dir=3D"ltr"><<a href=3D"mail= +to:btcdrak@gmail.com" target=3D"_blank">btcdrak@gmail.com</a>></span> wr= +ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border= +-left:1px #ccc solid;padding-left:1ex"> +In our case for Bitcoin Core, option 2 we use nVersion=3D8, apply a<br> +bitmask of 0xdffffff8 thus:<br> +<br> +=C2=A0 =C2=A0 if ((block.nVersion & ~0x20000007) >=3D 4 &&<b= +r> +CBlockIndex::IsSuperMajority(...)) { //...}<br> +<br> +With nVersion=3D8, but using comparison >=3D4 allows us to recover the<b= +r> +bit later, assuming we want it (otherwise we use version >=3D8).<br></bl= +ockquote><div><br></div><div>That is the 75% "activation" rule po= +rtion?=C2=A0 The 95% rule has to apply to all blocks.<br></div><div><br></d= +iv><div>The supermajority applies to unmasked blocks?<br><br></div><div>I t= +hink you want it so that a sequence of blocks with version 8 can be followe= +d by version 4 blocks?<br><br></div><div>If 950 of the last 1000 blocks hav= +e bit 0x08 set, then reject any block with a version less than 4.<br><br></= +div><div>This means transitioning to the version bits BIP just requires dro= +pping the version back to 4 and adding a rule enforcing the BIPs for versio= +n 4 and higher blocks.<br><br></div><div>This would be part of the version = +bits BIP enforcement.<br></div></div></div></div> + +--001a114661985ce5bc051dae0b0e-- + |