[Bitcoin-development] BIP 34: Block v2, Height in Coinbase

[Peter Vessenes]

On Fri, Jul 6, 2012 at 9:49 AM, Jeff Garzik <jgarzik at exmulti.com> wrote:

> On Fri, Jul 6, 2012 at 12:45 PM, Peter Vessenes <peter at coinlab.com> wrote:
> > The proposal is simple, and it's a small change for miners, I imagine.
> >
> > My question is: why?
> >
> > I worry about stuffing too many requirements on the coinbase. I suppose
> > the coinbase is easily extendible if we run out of bytes, but I think I'd
> > like to see some more discussion / good / bad type cases for making this
> > change. What do we get over just the prev_hash by doing this?
>
> With the existing setup (sans height in coinbase), you might not have
> unique transactions, with all that entails.
>
> Yes, I've experienced that myself, actually.


> > Anyway, some background would be great; if I missed it, I'm happy to go
> > read up, but I didn't see any links on the wiki.
>
> Gavin wrote some notes on upgrades and BIP16 lessons-learned at
> https://gist.github.com/2355445
>
> This is a super coherent and excellent writeup. I may come back with more
thoughts, I want to let it percolate. Thanks!

>  --
> Jeff Garzik
> exMULTI, Inc.
> jgarzik at exmulti.com
>



-- 
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[image: CoinLab Logo]PETER VESSENES
CEO

*peter at coinlab.com * /  206.486.6856  / SKYPE: vessenes
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