From: Christian Decker <decker.christian@gmail•com>
To: ZmnSCPxj <ZmnSCPxj@protonmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>,
Rusty Russell <rusty@rustcorp•com.au>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Making OP_TRUE standard?
Date: Thu, 17 May 2018 13:35:53 -0400 [thread overview]
Message-ID: <87h8n6i3ra.fsf@gmail.com> (raw)
In-Reply-To: <bGnScyqXi6LMbsqtc8l3DDTfibYhKd30y-Urd28iImu-gK2hBKYPLpkkbit18RkYlmakzoJAVqKyqL5bw_By_AdXJJd1r3QrLjH1W6igKPM=@protonmail.com>
ZmnSCPxj via bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org> writes:
> Good morning Rusty and list,
>
>> Your zero-val-OP_TRUE-can't-be-spent-after-same-block SF is
>> interesting,
>>
>> but if we want a SF just give us SIGHASH_NOINPUT and we'll not need
>> this
>>
>> at all (though others still might).
>
> We might still want this in general in Lightning; for instance we
> could make every funding transaction include such an output. If it
> turns out, our initial feerate estimate for the funding transaction is
> low, we can use the `OP_TRUE` for fee-bumping. This is a win for
> Lightning since the funding transaction ID remains the same (even in
> Decker-Russell-Osuntokun, the trigger transaction is signed with
> `SIGHASH_ALL`, and refers to a fixed funding transaction ID).
>
> Without the `OP_TRUE`-for-fee-bump, we would have to pretend to open a
> new different channel and RBF the old funding transaction with a new
> higher-feerate funding transaction, then keep track of which one gets
> confirmed deeply (there is a race where a miner discovers a block
> using the older funding transaction before our broadcast of the new
> funding transaction reaches it).
>
> (we could also feebump using the change output of the funding
> transaction, but such a change output might not exist for all funding
> transactions.)
This would only really help in the case of the funding tx not having a
change output, which I believe will be very rare. In the case of a
change output we can simply do a CPFP which includes the change output.
next prev parent reply other threads:[~2018-05-17 17:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-08 23:57 Rusty Russell
2018-05-09 0:24 ` Olaoluwa Osuntokun
2018-05-09 3:02 ` ZmnSCPxj
2018-05-10 2:08 ` Rusty Russell
2018-05-09 17:56 ` Johnson Lau
2018-05-09 19:27 ` Peter Todd
2018-05-09 20:19 ` Johnson Lau
2018-05-09 20:59 ` Peter Todd
2018-05-09 22:06 ` Olaoluwa Osuntokun
2018-05-10 2:06 ` Rusty Russell
2018-05-10 2:27 ` Luke Dashjr
2018-05-10 3:07 ` ZmnSCPxj
2018-05-15 1:22 ` ZmnSCPxj
2018-05-17 2:44 ` Rusty Russell
2018-05-17 10:28 ` ZmnSCPxj
2018-05-17 17:35 ` Christian Decker [this message]
2018-05-17 20:06 ` Jim Posen
2018-05-21 3:44 ` Rusty Russell
2018-05-21 3:56 ` Peter Todd
2018-05-30 2:47 ` Rusty Russell
2018-05-31 2:47 ` Rusty Russell
2018-05-21 14:20 ` Russell O'Connor
2018-05-10 9:33 ` Jorge Timón
2018-05-10 9:33 ` Jorge Timón
2018-05-10 9:43 ` Luke Dashjr
2018-05-11 2:44 ` ZmnSCPxj
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