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authorPeter Todd <pete@petertodd.org>2014-08-06 10:34:21 -0700
committerbitcoindev <bitcoindev@gnusha.org>2014-08-06 17:38:53 +0000
commita4d0a399946ba84cb61a335568fc3c17c04d866b (patch)
tree47dd0d5b3d1aac09bf78e1ef0127cd460c64659a /05
parentba28e7b6cce179e857437e53a7626d32b21bd241 (diff)
downloadpi-bitcoindev-a4d0a399946ba84cb61a335568fc3c17c04d866b.tar.gz
pi-bitcoindev-a4d0a399946ba84cb61a335568fc3c17c04d866b.zip
Re: [Bitcoin-development] deterministic transaction expiration
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+From: Peter Todd <pete@petertodd.org>
+Date: Wed, 06 Aug 2014 10:34:21 -0700
+To: Mark Friedenbach <mark@monetize.io>, Tom Harding <tomh@thinlink.com>,
+ Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
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+Subject: Re: [Bitcoin-development] deterministic transaction expiration
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+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA256
+
+
+
+On 6 August 2014 10:21:56 GMT-07:00, Mark Friedenbach <mark@monetize.io> wrote:
+>On 08/06/2014 01:02 PM, Tom Harding wrote:
+>> With first-eligible-height and last-eligible-height, creator could
+>> choose a lifetime shorter than the max, and in addition, lock the
+>whole
+>> thing until some point in the future.
+>
+>Note that this would be a massive, *massive* change that would
+>completely break bitcoin output frangibility. Merchants would have to
+>start demanding input history back to a certain depth in order to
+>ensure
+>they are not exposing themselves to undue reorg-expiry risk.
+
+Bitcoin is already "broken" in that regard due to malleability, and more fundamentally, the existence of anyone-can-spend outputs, known private keys, SIGHASH_ANYONECANPAY, etc.
+
+In any case, reorg-doublespend risk is no different than reorg-expiry risk.
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