From: Peter Todd <pete@petertodd•org>
To: Gregory Maxwell <gmaxwell@gmail•com>
Cc: Bitcoin Development <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] To prevent arbitrary data storage in txouts — The Ultimate Solution
Date: Wed, 10 Apr 2013 02:53:16 -0400 [thread overview]
Message-ID: <20130410065316.GA31965@savin> (raw)
In-Reply-To: <20130410030301.GA9921@savin>
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On Tue, Apr 09, 2013 at 11:03:01PM -0400, Peter Todd wrote:
> On Tue, Apr 09, 2013 at 07:53:38PM -0700, Gregory Maxwell wrote:
>
> Note how we can already do this: P2SH uses Hash160, which is
> RIPE160(SHA256(d)) We still need a new P2SH *address* type, that
> provides the full 256 bits, but no-one uses P2SH addresses yet anyway.
We can keep the length 160bits:
scriptPubKey: OP_HASH160 OP_HASH160 <Hash160(P2SHv2 address)> OP_EQUALVERIFY
You don't need to change the address type at all if new software is
written to check for both forms of txout in the actual
blockchain/transaction code at the deeper level. Basically now a P2SH
address could actually mean one of two scriptPubKey forms, must like a
normal address can mean either the hashed or bare OP_CHECKSIG form.
Of course, either way you have the odd side-effect that it's now
difficult to pay further funds to a random txout seen on the
blockchain... strange, although possibly not a bad thing.
--
'peter'[:-1]@petertodd.org
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next prev parent reply other threads:[~2013-04-10 6:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-10 2:53 Gregory Maxwell
2013-04-10 3:03 ` Peter Todd
2013-04-10 3:08 ` Peter Todd
2013-04-10 15:58 ` Jorge Timón
2013-04-11 11:27 ` Peter Todd
2013-04-10 6:53 ` Peter Todd [this message]
2013-04-10 7:15 ` Gregory Maxwell
2013-04-10 7:29 ` Peter Todd
2013-04-10 3:52 ` Robert Backhaus
2013-04-10 3:58 ` Gregory Maxwell
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