Re: [bitcoin-dev] Claiming an OP_RETURN Prefix

From: CryptAxe <cryptaxe@gmail•com>
To: lautaro.dragan@gmail•com,
	Lautaro Dragan <lautarodragan@gmail•com>,
	 Bitcoin Protocol Discussion
	<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Claiming an OP_RETURN Prefix
Date: Sun, 5 Aug 2018 18:54:50 -0700	[thread overview]
Message-ID: <CAF5CFkjxs4KBGJvpzhsyCRfdu-EGXS3mUyVPntnpNLO3cRW+xQ@mail.gmail.com> (raw)
In-Reply-To: <CAK6DEsp=1A61kK5K+8xZOX3wSiUhRdVoTm5nUu9dYY3C1CsPnA@mail.gmail.com>

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Don't worry about claiming it. There are no reserved prefixes enforced by
the software. For example anyone could create an output that uses the
witness coinbase commitment prefix bytes. It would just be ignored (unless
it was in the coinbase, in which case it would also need to be valid).

On Sun, Aug 5, 2018, 6:47 PM Lautaro Dragan via bitcoin-dev <
bitcoin-dev@lists•linuxfoundation.org> wrote:

> Thanks Peter for your prompt reply.
>
> And now that I think of it you're right - as easy as it is for us to
> differentiate OP_RETURN outputs that contain the Po.et prefix it would be
> for miners to block those transactions altogether. Is this what you mean?
>
> Still, a prefix is something we may have to live with for a little while
> until we can address that issue.
>
> Is there a formal / standard process to claim it we should follow?
>
>
>
>
> El dom., 5 de ago. de 2018 a la(s) 20:58, Peter Todd <pete@petertodd•org>
> escribió:
>
>>
>>
>> On August 5, 2018 9:11:26 PM UTC, Lautaro Dragan via bitcoin-dev <
>> bitcoin-dev@lists•linuxfoundation.org> wrote:
>> >Hi everyone,
>> >
>> >My name's Lautaro and I'm currently acting as Tech Lead of Po.et
>> ><https://en.bitcoin.it/wiki/OP_RETURN#OP_RETURN_prefixes>. At Po.et we
>> >use
>> >colored coins
>> ><
>> https://github.com/poetapp/node/blob/3c905bc5dbd3722ad39ac68041d9f2a099e5e84c/src/BlockchainWriter/ClaimController.ts#L101-L110
>> >
>> >to
>> >store data on the Bitcoin blockchain with prefix "POET".
>> >
>> >I've read in an old version of the OP_RETURN entry of the bitcoin wiki
>> ><https://en.bitcoin.it/w/index.php?title=OP_RETURN&oldid=62560> that
>> >*protocols
>> >wishing to claim OP_RETURN prefixes should use the standard Bitcoin
>> >Improvement Proposals process*.
>> >
>> >That entry seems to have changed recently
>> ><https://en.bitcoin.it/wiki/OP_RETURN#OP_RETURN_prefixes>, no longer
>> >stating that we should follow the BIP process, and I haven't been able
>> >to
>> >find any existing BIP claiming an OP_RETURN prexif, but for the sake of
>> >thoroughness I'd like to ask for your help or confirmation here.
>> >
>> >Should we actually be using the BIP process to claim a prefix?
>>
>> It's better if you don't use a prefix at all from a censorship resistance
>> and anonymity perspective; you're application should not require a prefix
>> for technical reasons.
>>
>> --
>> https://petertodd.org 'peter'[:-1]@petertodd.org
>>
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