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From: Antoine Riard <antoine.riard@gmail.com>
To: ArmchairCryptologist <ArmchairCryptologist@protonmail.com>,
	 Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] A Replacement for RBF and CPFP: Non-Destructive TXID Dependencies for Fee Sponsoring
Date: Tue, 22 Sep 2020 09:52:55 -0400	[thread overview]
Message-ID: <CALZpt+E19yodt3_LG+5x7G-bZ=6egrcGsTMR1+75aePNa1YPfw@mail.gmail.com> (raw)
In-Reply-To: <Jilb-w5AFlMx809pICIKdhhj3xBynWDlPtRTiJVIoxnC5_1gi6sK7rhOjl4e5HeMr7DDk9NjLdSGc8nWXaDIePDsjroiTd5xLU0xL3_INiY=@protonmail.com>

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Hello AC,

Yes that's a real issue. In the context of multi-party protocols, you may
pre-signed transactions with the feerate of _today_ and then only going to
be broadcast later with a feerate of _tomorrow_.
In that case the pre-signed feerate may be so low that the transaction
won't even propagate across network mempools with a local minimal feerate
higher.

That's why you want to be sure that the feerate of your  package of
transactions (either sponsor+sponsoree or parent+CPFP) is going to be
evaluated as a whole to decide acceptance of each element of the package.

Antoine


Le mar. 22 sept. 2020 à 03:28, ArmchairCryptologist via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> a écrit :

> Not sure if I'm missing something, but I'm curious if (how) this will work
> if the sponsored transaction's feerate is so low that it has been largely
> evicted from mempools due to fee pressure, and is too low to be widely
> accepted when re-broadcast? It seems to me that the following requirement
>
> >1. The Sponsor Vector's entry must be present in the mempool
>
> means that you enter a catch-22 where the sponsor transaction cannot be
> broadcast because the sponsored transaction is not in the mempool, and the
> sponsored transaction cannot be (re-)broadcast because the fee is too low.
> This requirement might therefore need to be revised.
>
> There is of course no global mempool, but RBF by its nature would still
> work in this case, by replacing the transaction if it exists and inserting
> it if it does not.
>
> --AC
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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  reply	other threads:[~2020-09-22 13:53 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22  6:24 [bitcoin-dev] A Replacement for RBF and CPFP: Non-Destructive TXID Dependencies for Fee Sponsoring ArmchairCryptologist
2020-09-22 13:52 ` Antoine Riard [this message]
  -- strict thread matches above, loose matches on Subject: below --
2020-09-19  0:51 Jeremy
2020-09-19  1:39 ` Cory Fields
2020-09-19 16:16   ` Jeremy
2020-09-19 13:37 ` David A. Harding
2020-09-19 15:01   ` nopara73
2020-09-19 16:30   ` Jeremy
2020-09-19 17:24     ` David A. Harding
2020-09-19 18:39 ` Antoine Riard
2020-09-19 19:13   ` Antoine Riard
2020-09-19 19:46     ` Jeremy
2020-09-20 23:10       ` Antoine Riard
2020-09-21 14:52         ` David A. Harding
2020-09-21 16:27           ` Jeremy
2020-09-21 23:40             ` Antoine Riard
2020-09-22 18:05             ` Suhas Daftuar
2020-09-23 22:10               ` Jeremy
2020-09-24  4:22                 ` Dmitry Petukhov

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