[Bitcoin-ml] Malleability Fix SIGHASH_ANYOUTPUT

[Steve Shadders]

It is immutable in the way it was originally intended... I.e. once
confirmed in the blockchain. We might speculate that Satoshi didn't think
of op_drop or other type of malleability but do we really believe he wasn't
aware of signature malleability which is the unfixable part of this whole
issue?

*Please* can we start listing these use cases so that we can begin
addressing them. At the moment we are arguing about a nebulous point... We
need to be dealing with concrete details because this argument is so mixed
up with assumptions people still have as hangovers from years or core
narrative.  We are in new big block paradigm now... Many use cases for LN
are largely subsumed by on chain functions that weren't feasible with a 1mb
limit. So what are the use cases, one by one? The only one I know of that
contemporary relevance (I.e. someone that actually needs it for their
business model) is Yours who decided that on chain was a better solution
than payment channels.

Your own use case of using txid with reusable addresses is easily dealt
with in other ways.

On 9 Oct 2017 10:20 PM, "Tom Zander via bitcoin-ml" <
bitcoin-ml at lists.linuxfoundation.org> wrote:

> On Monday, 9 October 2017 13:54:28 CEST Steve Shadders wrote:
> > I also disagree with calling malleability a bug. It is a property of
> > Bitcoin. Yes it prevents certain edge cases. But how do we know it
> doesn't
> > enable others?
>
> We know because nobody ever showed any code or design that actually enables
> other usecases.
>
> To me its rather simple; if something called an “ID” is not actually usable
> as an immutable identifier, and we know that there are plenty of usecases
> (including stuff we use daily) which demands it to actually be an immutable
> identifier, then obviously we should provide a way to make it do what it
> was
> meant to do.
>
> --
> Tom Zander
> Blog: https://zander.github.io
> Vlog: https://vimeo.com/channels/tomscryptochannel
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