

them to check node versions against the minimum required for

safety. 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.

We need some analysis on why this has happened. It appears the

larger hashrate is violating BIP66. Thus it appears the network

is rejecting this BIP, though potentially accidentally. If this is

an accident, how is such a large portion of hashrate forking, and

what can we do to avoid this in the future?

A near majority of the hashrate on the network appears to be SPV

mining.

Btcnuggets was a non-upgraded miner that produced an invalid block

after the lock in and f2pool and antpool have been extending it.

Fortunately their extension contains no transactions (an artifact

of SPV mining). Obviously a complete understanding is going to

take some time; though I would note that this general failure mode

was one we were aware of and is part of the reason the treshold is

so high.

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SPV clients are at risk in scenarios like this. We should encouragethem to check node versions against the minimum required forsafety. This check should be upgraded when new BIPs go into effect.It won't help against malicious nodes. But it will help in casessuch as today's.larger hashrate is violating BIP66. Thus it appears the networkis rejecting this BIP, though potentially accidentally. If this isan accident, how is such a large portion of hashrate forking, andwhat can we do to avoid this in the future?A near majority of the hashrate on the network appears to be SPVmining.Btcnuggets was a non-upgraded miner that produced an invalid blockafter the lock in and f2pool and antpool have been extending it.Fortunately their extension contains no transactions (an artifactof SPV mining). Obviously a complete understanding is going totake some time; though I would note that this general failure modewas one we were aware of and is part of the reason the treshold isso high._______________________________________________ bitcoin-dev mailinghttps://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

Raystonn,How would an average SPV wallet user know anything about this at all?They might not know it is even happening, or if they have some ideathat something is wrong, then they wouldn't know what to do.Say you use Electrum, some older version like 1.9. Electrum's currentversion is 2.3.3. Or say you use a slightly older version like 2.2.In any event, how is an end user possibly going to know which ofElectrum's (or any other SPV wallet's) versions are "the minimumrequired for safety?" (so as to know they would need to upgradebecause problems)? Is this just something where it's really down tocommunity announcements on websites and reddits and the like?- --http://abis.io ~"a protocol concept to enable decentralizationand expansion of a giving economy, and a new social good"https://keybase.io/odinn