Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 852B7BF7 for ; Mon, 20 Nov 2017 17:24:57 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-wm0-f53.google.com (mail-wm0-f53.google.com [74.125.82.53]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 4E7EF519 for ; Mon, 20 Nov 2017 17:24:55 +0000 (UTC) Received: by mail-wm0-f53.google.com with SMTP id u83so11911397wmb.5 for ; Mon, 20 Nov 2017 09:24:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=FPz/lZ7SQus5/ge7G6tnWoaoZjmD8QnD6o1fnh9n8LE=; b=vEmThmh2y5ZfcQ4REStPyY8IB5Qgs4YYY2CMrhZ6vWnbP8ulLumpIdpWyR1V8txdWH SGOd59/iJao8CHY9p4z79fKOft+eeeipYbJIP6jybbmvmU9CUQHYow5Wt7ADgSbzgE03 1cZkwamELsIaw9DEqz+ZeQf56zx6WQyXF/b8OWaDTYSUp9SopbF52jCrMtJbEIo59xAq 1gINI2QlyN/o5eIcV06LYCuz8Y43GxQB+ZwVrF6i8fQklHONZ+ojx5nz4ntXsrdlzhDu 0YQbdG3vK+Qr0N9+P5Ozo9LMS15tJhIl4npfUKY2X460u1itQ1CR+csa3F71Pz9RHv3Z 8nPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=FPz/lZ7SQus5/ge7G6tnWoaoZjmD8QnD6o1fnh9n8LE=; b=dxP43BRrq4eKT9PTHS2GiYhtAyemtuPqx8AXb98pbwRvGnxQY0iGgjoTgpvIevEUKO r7TZ6vzo3n7nU5w63Rc9WXWUcriEEuZpQP/I4hTsQKNeeagSqAj1VysaMQVDaysPuyUo hPjUdBif6d4TjTSZjATR9TSHbbfCVfck9pzt57ZEyGMEHiQs+rp8Xp0vWPUTDwnVzE5G t5Ttzgo87fSv+fpVR7/TVKl1Y346VnaHCw9e87BnklOtVBqoh+zS7uWIi7Ocx/ZfUOk5 HObpIhfTX7C5RtwIDV8bM8ywkZWsLGEmovae2RKxk1/GKvcjWaC/jPeC8uxlkqa8Y3jP u5jw== X-Gm-Message-State: AJaThX64SDCdpVFaaad0xcvcyiWNhspGcjIR45yxdKNz08Hqxk21ni0M GI3+cUt/0If6itHBrt1PyAzLHboJgnO/GQjpnvsj/Q== X-Google-Smtp-Source: AGs4zMZFU1yzwv4gTCJQmxlGa078wWBHM9pizjHiENOeO9eAVGFnZNUTU4LH5G2P4wImTGxLFGymtqVQlQp/Ni3+iB0= X-Received: by 10.28.212.69 with SMTP id l66mr10207275wmg.33.1511198693587; Mon, 20 Nov 2017 09:24:53 -0800 (PST) MIME-Version: 1.0 Received: by 10.28.225.6 with HTTP; Mon, 20 Nov 2017 09:24:33 -0800 (PST) From: Praveen Baratam Date: Mon, 20 Nov 2017 22:54:33 +0530 Message-ID: To: bitcoin-dev@lists.linuxfoundation.org Content-Type: multipart/alternative; boundary="001a11469a605101b1055e6d5dec" X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, HTML_MESSAGE, 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 X-Mailman-Approved-At: Mon, 20 Nov 2017 17:29:18 +0000 Subject: [bitcoin-dev] Why SegWit Anyway? 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: Mon, 20 Nov 2017 17:24:57 -0000 --001a11469a605101b1055e6d5dec Content-Type: text/plain; charset="UTF-8" Bitcoin Noob here. Please forgive my ignorance. From what I understand, in SegWit, the transaction needs to be serialized into a data structure that is different from the current one where signatures are separated from the rest of the transaction data. Why change the format at all? Why cant we just compute the Transaction ID the same way the hash for signing the transaction is computed? -- Dr. Praveen Baratam about.me --001a11469a605101b1055e6d5dec Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Bitcoin Noob here. Please forgive my ignorance.
=

From what I understand, in SegWit, the transaction needs to be seri= alized into a data structure that is different from the current one where s= ignatures are separated from the rest of the transaction data.
<= span style=3D"font-family:Verdana,arial,sans-serif;font-size:14px">
Why change the format at all? Why cant we just compute the Transacti= on ID the same way the hash for signing the transaction is computed?=

--
Dr. Praveen Baratam

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