Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 0EB5A7A for ; Mon, 10 Aug 2015 19:49:26 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-wi0-f179.google.com (mail-wi0-f179.google.com [209.85.212.179]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id A88F4160 for ; Mon, 10 Aug 2015 19:49:24 +0000 (UTC) Received: by wicne3 with SMTP id ne3so34974079wic.0 for ; Mon, 10 Aug 2015 12:49:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=vsZihyyzOnOxFuLurqN4FiRF5biWzMbUYO1OG3rc//c=; b=ENq+WCKRvIANbOqA2FeVKU8hbMsAs0DxiDF6wGIVKE2VcXJniU5t5YWOzNcviX8yTO 5wAh8XgkEAsGxf70a2iF8J7rYlym1FuOy+y1m6UJtcQdnpY7IhtTY1lJnl0Ds76awGEY 6MTuCDHzPdGXfonmvCVVuPyFBn2WjLPWZpetxkCqm928/yda2g8wsPIw0/ku0QBt20Ix yh8sjQ3W6qCvU8stdswLFfjQ52q8oNPx7jrHJzxpaD6f9CfMNSdcNTe79L0K8K2BmUpb STdk7JU26XFhgBQ+5WgWHOz4MhqpNZnj2MOri2HgGKNRgHvmHihfEBmW0qgL6Hx4LDmZ A4/g== X-Gm-Message-State: ALoCoQkxrhTH5PA58QwC8JihaShgNKkjsKfQXRQA4oot8S/2gz0JrVKzSgU6034ykZs8wTCDCTJ4 MIME-Version: 1.0 X-Received: by 10.194.122.97 with SMTP id lr1mr47124946wjb.26.1439236163387; Mon, 10 Aug 2015 12:49:23 -0700 (PDT) Received: by 10.194.31.230 with HTTP; Mon, 10 Aug 2015 12:49:23 -0700 (PDT) In-Reply-To: <55C8F948.3070705@jrn.me.uk> References: <55C75FC8.6070807@jrn.me.uk> <201508092346.20301.luke@dashjr.org> <55C8EE2A.3030309@jrn.me.uk> <201508101841.00173.luke@dashjr.org> <55C8F948.3070705@jrn.me.uk> Date: Mon, 10 Aug 2015 21:49:23 +0200 Message-ID: From: =?UTF-8?B?Sm9yZ2UgVGltw7Nu?= To: Ross Nicoll Content-Type: text/plain; charset=UTF-8 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,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] Alternative chain support for payment protocol 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: Mon, 10 Aug 2015 19:49:26 -0000 On Mon, Aug 10, 2015 at 9:19 PM, Ross Nicoll via bitcoin-dev wrote: > That could definitely be done, for example by making the genesis field > "repeated", so it specifies all potential networks. The response would need > to indicate which hash it used, but that could be chain tip (with height in > a further field), and provide fork detection. No, the chain ID needs to be unique, that's the whole point.