From: Johnson Lau <jl2012@xbt•hk>
To: Sergio Demian Lerner <sergio.d.lerner@gmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Attack by modifying non-segwit transactions after segwit is accepted ?
Date: Wed, 24 Aug 2016 21:49:34 -0400 (EDT) [thread overview]
Message-ID: <339348690.148734.1472089774841@privateemail.com> (raw)
In-Reply-To: <CAKzdR-q4hagujzWxJxmwpxJUQFLe7SKukbDNs=_S_VKgJ9N_TA@mail.gmail.com>
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Adding witness data to a non-segwit script is invalid by consensus:
https://github.com/bitcoin/bitcoin/blob/d612837814020ae832499d18e6ee5eb919a87907/src/script/interpreter.cpp#L1467
This PR will detect such violation early and ban the peer:
https://github.com/bitcoin/bitcoin/pull/8499
Another approach is to run the scripts of all incoming transactions. That's not too bad as you have already fetched the utxos which is a major part of validation.
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next prev parent reply other threads:[~2016-08-25 1:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 20:51 Sergio Demian Lerner
2016-08-25 1:49 ` Johnson Lau [this message]
2016-08-26 13:16 ` Sergio Demian Lerner
2016-09-01 11:29 ` Johnson Lau
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