public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Tier Nolan <tier.nolan@gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] SF proposal: prohibit unspendable outputs with amount=0
Date: Thu, 7 Sep 2017 11:31:41 +0100	[thread overview]
Message-ID: <CAE-z3OWYmi+4jVO8kKB1EBT7mYhPE=MNf6JvNVYteVfZ24qqkg@mail.gmail.com> (raw)
In-Reply-To: <CAF5CFkh4DWE6Ca-5LFrgkGxWgYqqJdEdv+JZ+3wp+0eTm_vqCw@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 2245 bytes --]

You could have a timelocked transaction that has a zero value input (and
other non-zero inputs).  If the SF happened, that transaction would become
unspendable.

The keys to the outputs may be lost or the co-signer may refuse to
cooperate.

There seems to be some objections to long term timelocked transactions.

If someone asked me about it, I would recommend that any timelocked
transactions should very carefully make sure that they use forms that are
popular.

I think the fairest rule would be that any change which makes some
transactions invalid should be opt-in and only apply to new transaction
version numbers.

If you create a timelocked transactions with an undefined version number,
then you have little to complain about.

If the version number is defined and in-use, then transactions should not
suddenly lose validity.

A refusal to commit to that makes long term locktime use much more risky.

On Thu, Sep 7, 2017 at 12:54 AM, CryptAxe via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> As long as an unspendable outputs (OP_RETURN outputs for example) with
> amount=0 are still allowed I don't see it being an issue for anything.
>
> On Sep 5, 2017 2:52 PM, "Jorge Timón via bitcoin-dev" <bitcoin-dev@lists.
> linuxfoundation.org> wrote:
>
>> This is not a priority, not very important either.
>> Right now it is possible to create 0-value outputs that are spendable
>> and thus stay in the utxo (potentially forever). Requiring at least 1
>> satoshi per output doesn't really do much against a spam attack to the
>> utxo, but I think it would be slightly better than the current
>> situation.
>>
>> Is there any reason or use case to keep allowing spendable outputs
>> with null amounts in them?
>>
>> If not, I'm happy to create a BIP with its code, this should be simple.
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>

[-- Attachment #2: Type: text/html, Size: 3456 bytes --]

  parent reply	other threads:[~2017-09-07 10:32 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-05 21:51 [bitcoin-dev] SF proposal: prohibit unspendable outputs with amount=0 Jorge Timón
2017-09-06 22:20 ` Tier Nolan
2017-09-06 23:54 ` CryptAxe
2017-09-07  1:29   ` Adam Back
2017-09-07  3:41     ` CryptAxe
2017-09-07  9:56       ` Hampus Sjöberg
2017-09-07 10:31   ` Tier Nolan [this message]
2017-09-07 18:00 ` Peter Todd
2017-09-09 21:11   ` Jorge Timón
2017-09-13  9:24     ` Peter Todd
2017-09-13  9:34       ` Gregory Maxwell

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAE-z3OWYmi+4jVO8kKB1EBT7mYhPE=MNf6JvNVYteVfZ24qqkg@mail.gmail.com' \
    --to=tier.nolan@gmail.com \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox