Date: Thu, 12 Jan 2017 14:58:30 -0500
From: Peter Todd <pete@petertodd.org>
To: Greg Sanders <gsanders87@gmail.com>,
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Message-ID: <20170112195830.GA5663@savin.petertodd.org>
References: <2ac49fb0-ff79-5cb9-7b92-14ec791ecc45@dyne.org>
	<CAB3F3DtJ3Hq5saz7fVd95bhi+Y84m6U1GuduHOGyXuhVwRaWeg@mail.gmail.com>
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Subject: Re: [bitcoin-dev] Transaction Replacement by Fee
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On Thu, Jan 12, 2017 at 09:13:23AM -0500, Greg Sanders via bitcoin-dev wrot=
e:
> BIP125 is the standard way to signal:
> https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki
>=20
> Should explain everything you need.

Additionally some miners mine full replace-by-fee, which has no limitations=
 on
nSequence. My implementation (for v0.13.2) is here:

    https://github.com/petertodd/bitcoin/tree/replace-by-fee-v0.13.2

and is identical to Bitcoin Core modulo the nSequence stuff being removed, =
and
a special service bit added to allow full-rbf nodes to preferentially peer =
with
each other to make sure replacement transactions get propagated.

In practice full-RBF works fairly well, so while it's even faster to use the
nSequence signalling specified in BIP-125, doing so is not mandatory so lon=
g as
you can et your replacement transaction to a full-RBF node.

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

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