From cjamthagen at gmx.com  Sat Aug  1 10:30:16 2015
From: cjamthagen at gmx.com (Christopher Jamthagen)
Date: Sat, 1 Aug 2015 12:30:16 +0200
Subject: [Lightning-dev] Stealing money from a hub?
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> Sent:?Saturday, August 01, 2015 at 11:57 AM
> From:?"Eric Lombrozo" <elombrozo at gmail.com>
> To:?"Rusty Russell" <rusty at rustcorp.com.au>
> Cc:?"Christopher Jamthagen" <cjamthagen at gmx.com>, "lightning-dev at lists.linuxfoundation.org" <lightning-dev at lists.linuxfoundation.org>
> Subject:?Re: [Lightning-dev] Stealing money from a hub?

?

> On Jul 30, 2015, at 4:48 PM, Rusty Russell <rusty at rustcorp.com.au> wrote:?
> But I realized yesterday, outsourcing needs a new sighash op mode (or
> normalized txids), so it's not really something to design a deployable
> system around today.?
> Can you elaborate on this, Rusty?

We wont know the txid of the revoked commitment transaction until the cheater signs and broadcasts it, thus we cannot pre-sign the stealing transaction for the third party.