btcsuite / btcd / 9180393402

Pull #2178

github

mempool: make txn's below 65 non-witness bytes non-standard

This is to mitigate CVE-2017-12842. Along the way, also error when
deserializing transactions that have the witness marker flag set
but have no witnesses. This matches Bitcoin Core's behaviour initially
introduced here https://github.com/bitcoin/bitcoin/pull/14039. Allowing
such transactions is benign, but this makes sure that our parsing code
matches Core's exactly.

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