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Date: Sat, 4 Jul 2015 01:22:09 -0400
From: Peter Todd <pete@petertodd.org>
To: Raystonn <raystonn@hotmail.com>
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Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] Fork of invalid blocks due to BIP66 violations
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On Fri, Jul 03, 2015 at 10:17:38PM -0700, Raystonn wrote:

Yeah, I was really surprised when I found out today that bitcoinj
doesn't implement any of the soft-fork code. There's no excuse for not
doing that frankly. :(

> <p dir=3D"ltr">SPV clients are at risk in scenarios like this.  We should=
 encourage them to check node versions against the minimum required for saf=
ety.  This check should be upgraded when new BIPs go into effect.  It won't=
 help against malicious nodes.  But it will help in cases such as today's.<=
br>
> </p>
> <div class=3D"gmail_quote">On 3 Jul 2015 8:17 pm, Gregory Maxwell &lt;gma=
xwell@gmail.com&gt; wrote:<br type=3D'attribution'><blockquote class=3D"quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
>=20
>=20
>=20
> <div>
> <div>On Sat, Jul 4, 2015 at 3:11 AM, Raystonn &lt;raystonn&#64;hotmail.co=
m&gt; wrote:<br />
> &gt; We need some analysis on why this has happened.=A0 It appears the la=
rger hashrate is violating BIP66.=A0 Thus it appears the network is rejecti=
ng this BIP, though potentially accidentally.=A0 If this is an accident, ho=
w is such a large portion of hashrate forking, and what can we do to avoid =
this in the future?<br />
> <br />
> A near majority of the hashrate on the network appears to be SPV mining.<=
br />
> <br />
> Btcnuggets was a non-upgraded miner that produced an invalid block<br />
> after the lock in and f2pool and antpool have been extending it.<br />
> Fortunately their extension contains no transactions (an artifact of<br />
> SPV mining).=A0 Obviously a complete understanding is going to take some<=
br />
> time;=A0 though I would note that this general failure mode was one we<br=
 />
> were aware of and is part of the reason the treshold is so high.<br />
> </div>
> </div>
>=20
> </blockquote></div>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev


--=20
'peter'[:-1]@petertodd.org
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