Subject: Re: [bitcoin-dev] Using a storage engine without UTXO-index

From: Tom Harding <[email-masked]>
Date: Sat, 8 Apr 2017 11:27:19 -0700

On Apr 7, 2017 12:42, "Gregory Maxwell" <[email-masked]> wrote:

On Fri, Apr 7, 2017 at 6:52 PM, Tom Harding via bitcoin-dev
<[email-masked]> wrote:
> A network in which many nodes maintain a transaction index also enables a
> class of light node applications that ask peers to prove existence and
> spentness of TXO's.

Only with the additional commitment structure such as those proposed
by Peter Todd in his stxo/txo commitment designs, e.g.
https://petertodd.org/2016/delayed-txo-commitments

Light nodes are improved by detecting invalid transactions, even before
they are mined.