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From: gronager@mac.com
In-reply-to: <A08D9088-82EE-4F67-B260-8AF5CB1D15A6@gmail.com>
Date: Thu, 13 Dec 2012 10:00:55 +0100
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References: <A08D9088-82EE-4F67-B260-8AF5CB1D15A6@gmail.com>
To: Eric Lombrozo <elombrozo@gmail.com>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Zero-length scripts
Precedence: list

Normally I would consider it an error of the parsing script of =
blockchain (seen that before), however, this seems genuine enough.

the second transaction is the most amusing - it has an output script =
which is:
OP_HASH256 =
000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f =
OP_EQUAL

The hash is the most famous bitcoin hash... - so if you can come up with =
something that, when hashed with sha256 yields the genesisblock hash you =
can claim one BTC ;)

It is actually very easy to do (!), however, it is a game only for =
miners, as non_standard transactions are not relayed between standard =
clients. So now a miner can have a go creating a transaction redeeming =
this 1BTC.

Perhaps, Eligius creating that block, might be playing a little =
christmas game :)

Cheers,

Michael

On 12/12/2012, at 23:09, Eric Lombrozo <elombrozo@gmail.com> wrote:

> I've noticed a few transactions that have zero-length input and/or =
output scripts. There's a couple examples in block =
0000000000000159a27442ee8b7f9ffad0cd799b003eafe007de9fbb47bd6ce7:
>=20
> Txs: cdb553214a51ef8d4393b96a185ebbbc2c84b7014e9497fea8aec1ff990dae35, =
af32bb06f12f2ae5fdb7face7cd272be67c923e86b7a66a76ded02d954c2f94d
>=20
>=20
> Is there ever a legitimate reason to create a transaction with a =
zero-length script? Should the protocol even allow it?
>=20
> -Eric Lombrozo
>=20
> =
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Michael Gr=F8nager
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