From elombrozo at gmail.com  Wed Jul 29 22:28:53 2015
From: elombrozo at gmail.com (Eric Lombrozo)
Date: Wed, 29 Jul 2015 15:28:53 -0700
Subject: [Lightning-dev]  OP_CHECKSPVPROOFVERIFY
In-Reply-To: <CABr1YTfvwPJW-V7VexWNN4G2mCdRUn6CRcYA2xfzpPfBqt_DcQ@mail.gmail.com>
References: <5B9604FB-B266-4EC8-81DE-3DC1C120F762@gmail.com>
	<20150729195417.GB27670@lightning.network>
	<CABr1YTfvwPJW-V7VexWNN4G2mCdRUn6CRcYA2xfzpPfBqt_DcQ@mail.gmail.com>
Message-ID: <CABr1YTc9t3=zcg-SxB=9ydFkgsfYMRB15JnQR9uA=ksLo_eHBA@mail.gmail.com>

I should have posted this to the whole group. Sorry, hit the wrong button.
:p
---------- Forwarded message ----------
From: "Eric Lombrozo" <elombrozo at gmail.com>
Date: Jul 29, 2015 3:27 PM
Subject: Re: [Lightning-dev] OP_CHECKSPVPROOFVERIFY
To: "Joseph Poon" <joseph at lightning.network>
Cc:

Joseph,

The point isn't better security than current SPV proofs. That would require
improvements to the commitment structures.

The point is to allow outsourceability of SPV proofs over LN. We would want
to avoid actually using OP_CHECKSPVPROOFVERIFY in the blockchain...but it
would allow crafting a contract requesting payment from the SPV client
along with an enforcement mechanism in the event the client fails to pay.

- Eric
On Jul 29, 2015 12:54 PM, "Joseph Poon" <joseph at lightning.network> wrote:

> Hi Eric,
>
> On Wed, Jul 29, 2015 at 02:08:39AM -0700, Eric Lombrozo wrote:
> > It occurs to me that with the LN, it might be practical to outsource
> > SPV proofs from other nodes.
>
> I couldn't find anything on an SPV proof opcode, what kind of opcode are
> you thinking of or do you have any links? I tried looking it up but
> couldn't find anything about it. I'm curious on whether/how it could it
> offer significantly better security than current SPV proofs.
>
> --
> Joseph Poon
>
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