From: Johnson Lau <jl2012@xbt•hk>
To: Peter Todd <pete@petertodd•org>
Cc: bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Making OP_TRUE standard?
Date: Thu, 10 May 2018 04:19:31 +0800 [thread overview]
Message-ID: <4E64F59E-3367-4C4E-A9FB-48ED568BC2D3@xbt.hk> (raw)
In-Reply-To: <20180509192733.6aif4wapolbb5z7c@petertodd.org>
> On 10 May 2018, at 3:27 AM, Peter Todd <pete@petertodd•org> wrote:
>
> On Thu, May 10, 2018 at 01:56:46AM +0800, Johnson Lau via bitcoin-dev wrote:
>> You should make a “0 fee tx with exactly one OP_TRUE output” standard, but nothing else. This makes sure CPFP will always be needed, so the OP_TRUE output won’t pollute the UTXO set
>>
>> Instead, would you consider to use ANYONECANPAY to sign the tx, so it is possible add more inputs for fees? The total tx size is bigger than the OP_TRUE approach, but you don’t need to ask for any protocol change.
>>
>> In long-term, I think the right way is to have a more flexible SIGHASH system to allow people to add more inputs and outputs easily.
>
> I don't think that will work, as a zero-fee tx won't get relayed even with
> CPFP, due to the fact that we haven't yet implemented package-based tx
> relaying.
>
> --
> https://petertodd.org 'peter'[:-1]@petertodd.org
My only concern is UTXO pollution. There could be a “CPFP anchor” softfork that outputs with empty scriptPubKey and 0 value are spendable only in the same block. If not spent immediately, they become invalid and are removed from UTXO. But I still think the best solution is a more flexible SIGHASH system, which doesn’t need CPFP at all.
next prev parent reply other threads:[~2018-05-09 20:19 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 [this message]
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
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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