<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Apr 7, 2017 12:42, "Gregory Maxwell" <<a href="mailto:greg@xiph.org">greg@xiph.org</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="quoted-text">On Fri, Apr 7, 2017 at 6:52 PM, Tom Harding via bitcoin-dev<br>
<<a href="mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.<wbr>linuxfoundation.org</a>> wrote:<br>
> A network in which many nodes maintain a transaction index also enables a<br>
> class of light node applications that ask peers to prove existence and<br>
> spentness of TXO's.<br>
<br>
</div>Only with the additional commitment structure such as those proposed<br>
by Peter Todd in his stxo/txo commitment designs, e.g.<br>
<a href="https://petertodd.org/2016/delayed-txo-commitments" rel="noreferrer" target="_blank">https://petertodd.org/2016/<wbr>delayed-txo-commitments</a><br>
</blockquote></div><br></div></div><div class="gmail_extra" dir="auto">Light nodes are improved by detecting invalid transactions, even before they are mined.</div></div>