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| author | Johnson Lau <jl2012@xbt.hk> | 2017-04-27 04:09:34 +0800 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2017-04-26 20:09:41 +0000 |
| commit | b62f9d6ecff51a767765b9e5fe1f4cb666382e5f (patch) | |
| tree | a153c240742d283c75f3c6e2db89c58a6ba91202 | |
| parent | cab557fedbf8414ce0b159469ddcc68de3727ca3 (diff) | |
| download | pi-bitcoindev-b62f9d6ecff51a767765b9e5fe1f4cb666382e5f.tar.gz pi-bitcoindev-b62f9d6ecff51a767765b9e5fe1f4cb666382e5f.zip | |
Re: [bitcoin-dev] Segwit v2
| -rw-r--r-- | 90/d51e43225b3609b86560d5650180a65d916132 | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/90/d51e43225b3609b86560d5650180a65d916132 b/90/d51e43225b3609b86560d5650180a65d916132 new file mode 100644 index 000000000..25f34184e --- /dev/null +++ b/90/d51e43225b3609b86560d5650180a65d916132 @@ -0,0 +1,92 @@ +Return-Path: <jl2012@xbt.hk> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id C84B2C01 + for <bitcoin-dev@lists.linuxfoundation.org>; + Wed, 26 Apr 2017 20:09:41 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from sender-of-o52.zoho.com (sender-of-o52.zoho.com [135.84.80.217]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 0F29E124 + for <bitcoin-dev@lists.linuxfoundation.org>; + Wed, 26 Apr 2017 20:09:40 +0000 (UTC) +Received: from [10.8.8.2] (119246245241.ctinets.com [119.246.245.241]) by + mx.zohomail.com with SMTPS id 1493237378167603.2617503621799; + Wed, 26 Apr 2017 13:09:38 -0700 (PDT) +Content-Type: text/plain; charset=utf-8 +Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) +From: Johnson Lau <jl2012@xbt.hk> +In-Reply-To: <201704262001.10933.luke@dashjr.org> +Date: Thu, 27 Apr 2017 04:09:34 +0800 +Content-Transfer-Encoding: quoted-printable +Message-Id: <442502AC-CC00-481C-A864-5E5F6F648276@xbt.hk> +References: <201704202028.53113.luke@dashjr.org> + <06E90C6D-8B4C-40A7-8807-8811A27AE401@xbt.hk> + <201704262001.10933.luke@dashjr.org> +To: Luke Dashjr <luke@dashjr.org> +X-Mailer: Apple Mail (2.3259) +X-ZohoMailClient: External +X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE + 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] Segwit v2 +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Protocol 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, 26 Apr 2017 20:09:41 -0000 + + +> On 27 Apr 2017, at 04:01, Luke Dashjr <luke@dashjr.org> wrote: +>=20 +> On Wednesday 26 April 2017 7:31:38 PM Johnson Lau wrote: +>> I prefer not to do anything that requires pools software upgrade or = +wallet +>> upgrade. So I prefer to keep the dummy marker, and not change the +>> commitment structure as suggested by another post. +>=20 +> Fair enough, I guess. Although I think the dummy marker could actually = +be non- +> consensus critical so long as the hashing replaces it with a 0. +>=20 +>> For your second suggestion, I think we should keep scriptSig empty as = +that +>> should be obsoleted. If you want to put something in scriptSig, you = +should +>> put it in witness instead. +>=20 +> There are things scriptSig can do that witness cannot today - = +specifically add=20 +> additional conditions under the signature. We can always obsolete = +scriptSig=20 +> later, after segwit has provided an alternative way to do this. + +You can do this with witness too, which is also cheaper. Just need to = +make sure the signature covers a special part of the witness. I will = +make a proposal to Litecoin soon, which allows signing and executing = +extra scripts in witness. Useful for things like OP_PUSHBLOCKHASH + +>=20 +>> Maybe we could restrict witness to IsPushOnly() scriptPubKey, so = +miners +>> can=E2=80=99t put garbage to legacy txs. +>=20 +> They already can malleate transactions and add garbage to the blocks. = +I don't=20 +> see the benefit here. + +Witness is cheaper and bigger + +>=20 +> Luke + + + |