From: Jeff Garzik <jgarzik@exmulti•com>
To: Bitcoin Development <bitcoin-development@lists•sourceforge.net>
Subject: [Bitcoin-development] Atomic coin swapping?
Date: Sat, 22 Sep 2012 03:28:05 -0400 [thread overview]
Message-ID: <CA+8xBpczY1DkgmHsVL8m30JaM1d+FwN_gpBhq6DFScm1nvLF5w@mail.gmail.com> (raw)
Forum URL: https://bitcointalk.org/index.php?topic=112007.0
gmaxwell was talking about colored coins[1] in IRC recently. They are
potentially interesting in the context of distributed bonds[2], which
I am currently pursuing with pybond[3].
Here is the problem I am trying to solve, does the crowd have an answer?
1. Alice transfers a 1-satoshi colored coin to Bob.
2. Bob transfers 100 BTC to Alice. May be restricted to 1 txout, if
that eases implementation details.
3. Steps #1 and #2 happen as an atomic unit, all-or-none.
4. Alice and Bob must both approve this atomic transfer of coins, with
appropriate signatures.
Is this possible within the current bitcoin system? As far as I can
see, the answer is "no" but maybe I'm missing something.
My best guess to the answer is "possible, but requires a new SIGHASH_* type"?
[1] https://bitcointalk.org/index.php?topic=106449.0
[2] https://bitcointalk.org/index.php?topic=92421.0
[3] https://github.com/jgarzik/pybond
--
Jeff Garzik
exMULTI, Inc.
jgarzik@exmulti•com
next reply other threads:[~2012-09-22 7:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-22 7:28 Jeff Garzik [this message]
2012-09-22 9:10 ` Jorge Timón
2012-09-22 11:04 ` Mike Hearn
2012-09-22 17:05 ` Mike Hearn
2012-09-22 17:09 ` Jeff Garzik
2012-09-22 18:24 ` Jorge Timón
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