From: ZmnSCPxj <ZmnSCPxj@protonmail•com>
To: Antoine Riard <antoine.riard@gmail•com>
Cc: Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>,
"lightning-dev\\\\\\\\@lists.linuxfoundation.org"
<lightning-dev@lists•linuxfoundation.org>,
security@ariard•me
Subject: Re: [bitcoin-dev] [Lightning-dev] OP_Expire and Coinbase-Like Behavior: Making HTLCs Safer by Letting Transactions Expire Safely
Date: Tue, 07 Nov 2023 11:11:59 +0000 [thread overview]
Message-ID: <iBopsZOx5TRDjjfxSLo9GLa00c7Jk0uMSae6_EPsPjnd10Aa87-lxVIZnL37GwEM3ppemBAxCwkv7r4w5AfDjLkKo0OhIpdB0jK0_OTRqf4=@protonmail.com> (raw)
In-Reply-To: <CALZpt+GXGBbo0JjOyMr3B-3dVY2Q_DuzF6Sn3xE5W24x77PRYg@mail.gmail.com>
Good morning Antoine,
> Once the HTLC is committed on the Bob-Caroll link, Caroll releases the preimage off-chain to Bob with an `update_fulfill_htlc` message, though Bob does _not_ send back his signature for the updated channel state.
>
> Some blocks before 100, Caroll goes on-chain to claim the inbound HTLC output with the preimage. Her commitment transaction propagation in network mempools is systematically "replaced cycled out" by Bob.
I think this is impossible?
In this scenario, there is an HTLC offered by Bob to Carol.
Prior to block 100, only Carol can actually create an HTLC-success transaction.
Bob cannot propagate an HTLC-timeout transaction because the HTLC timelock says "wait till block 100".
Neither can Bob replace-recycle out the commitment transaction itself, because the commitment transaction is a single-input transaction, whose sole input requires a signature from Bob and a signature from Carol --- obviously Carol will not cooperate on an attack on herself.
So as long as Carol is able to get the HTLC-success transaction confirmed before block 100, Bob cannot attack.
Of course, once block 100 is reached, `OP_EXPIRE` will then mean that Carol cannot claim the fund anymore.
Regards,
ZmnSCPxj
next prev parent reply other threads:[~2023-11-07 11:12 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-16 16:57 [bitcoin-dev] Full Disclosure: CVE-2023-40231 / CVE-2023-40232 / CVE-2023-40233 / CVE-2023-40234 "All your mempool are belong to us" Antoine Riard
2023-10-16 19:13 ` Peter Todd
2023-10-16 22:10 ` Matt Morehouse
2023-10-17 1:11 ` Antoine Riard
2023-10-20 10:47 ` Peter Todd
2023-10-20 11:18 ` Jochen Hoenicke
2023-10-16 22:51 ` Olaoluwa Osuntokun
2023-10-17 7:21 ` [bitcoin-dev] [Lightning-dev] " ziggie1984
2023-10-17 10:34 ` ZmnSCPxj
2023-10-17 18:34 ` Antoine Riard
2023-10-20 10:31 ` Peter Todd
2023-10-20 11:03 ` Peter Todd
2023-10-20 18:35 ` Matt Morehouse
2023-10-20 21:05 ` Matt Corallo
2023-10-21 0:15 ` Peter Todd
2023-10-21 1:03 ` Matt Corallo
2023-10-21 1:25 ` Peter Todd
2023-10-21 1:55 ` Matt Corallo
2023-10-21 2:43 ` Peter Todd
2023-10-23 16:09 ` Matt Corallo
2023-10-17 17:47 ` Antoine Riard
2023-10-17 18:47 ` Antoine Riard
2023-10-18 0:17 ` Matt Corallo
2023-10-18 2:57 ` Antoine Riard
2023-10-19 8:12 ` Bastien TEINTURIER
2023-10-19 16:23 ` Matt Morehouse
2023-10-19 17:22 ` Antoine Riard
2023-10-19 17:53 ` Matt Morehouse
2023-10-19 19:33 ` Antoine Riard
2023-10-21 0:18 ` Olaoluwa Osuntokun
2023-11-17 22:36 ` Antoine Riard
2023-10-19 18:02 ` Matt Corallo
2023-10-20 6:56 ` [bitcoin-dev] " Antoine Riard
2023-10-21 20:05 ` Antoine Riard
2023-10-27 0:43 ` Peter Todd
2023-11-02 4:46 ` Antoine Riard
2023-10-21 0:09 ` [bitcoin-dev] OP_Expire and Coinbase-Like Behavior: Making HTLCs Safer by Letting Transactions Expire Safely Peter Todd
2023-10-21 8:58 ` David A. Harding
2023-10-21 10:31 ` Peter Todd
2023-10-22 8:30 ` vjudeu
2023-10-23 11:10 ` [bitcoin-dev] [Lightning-dev] " ZmnSCPxj
2023-10-23 15:45 ` Peter Todd
2023-11-02 5:24 ` [bitcoin-dev] " Antoine Riard
2023-11-02 6:26 ` Peter Todd
2023-11-02 17:07 ` Matt Morehouse
2023-11-03 5:27 ` Antoine Riard
2023-11-03 5:25 ` Antoine Riard
2023-11-04 7:26 ` Peter Todd
2023-11-06 18:45 ` Antoine Riard
2023-11-07 11:11 ` ZmnSCPxj [this message]
2023-11-07 15:44 ` [bitcoin-dev] [Lightning-dev] " Antoine Riard
2023-11-08 0:51 ` [bitcoin-dev] " Peter Todd
2023-11-08 2:06 ` Peter Todd
2023-11-13 2:18 ` Antoine Riard
2023-11-14 19:50 ` Peter Todd
[not found] ` <CALZpt+H38cU9L8kq0mSYCDirzL39fxhdoz4pAPiS8dGJP8akKg@mail.gmail.com>
2023-11-15 17:53 ` [bitcoin-dev] Fwd: " Antoine Riard
2023-10-22 4:49 ` [bitcoin-dev] Full Disclosure: CVE-2023-40231 / CVE-2023-40232 / CVE-2023-40233 / CVE-2023-40234 "All your mempool are belong to us" Nadav Ivgi
2023-10-23 8:49 ` David A. Harding
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