Date: Wed, 11 Apr 2018 03:52:25 -0400
From: Peter Todd <pete@petertodd.org>
To: Karl-Johan Alm <karljohan-alm@garage.co.jp>,
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Message-ID: <20180411075225.GG20665@savin.petertodd.org>
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	<CALJw2w6Guc6rX7A_8Nqob+w1=NKi2DfH9aj2-sg2EfgRFjDw0g@mail.gmail.com>
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Subject: Re: [bitcoin-dev] Few questions regarding ListTransaction
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On Wed, Apr 11, 2018 at 02:22:42PM +0900, Karl-Johan Alm via bitcoin-dev wr=
ote:
> Clarification on one part below:
>=20
> On Wed, Apr 11, 2018 at 2:21 PM, Karl-Johan Alm
> <karljohan-alm@garage.co.jp> wrote:
> > On Wed, Apr 11, 2018 at 5:29 AM, Maksim Solovjov via bitcoin-dev
> > <bitcoin-dev@lists.linuxfoundation.org> wrote:
> >> 1. What does it mean for a transaction ( with 0 confirmations ) to be
> >> trusted or not?
> >
> > It is trusted if (1) it is final (i.e. it can't be replaced), (2) it
> > is not in a block that was reorged out (negative confirmation count),
> > (3) the 'spend zero conf change' option is set, (4) it is in the
> > mempool, and (5) all inputs are from us.
>=20
> "can't be replaced" here means it cannot be replaced through
> conventional means. It is always possible to replace a transaction
> that has not yet been confirmed, e.g. by asking a miner to mine a
> conflicting transaction directly.

Or via full replace-by-fee, which appears to be used by a significant minor=
ity
of miners:

https://github.com/petertodd/bitcoin/tree/replace-by-fee-v0.16.0

In practice transaction replacement by the sender for any transaction is ve=
ry
easy.

--=20
https://petertodd.org 'peter'[:-1]@petertodd.org

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