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From: Luke Dashjr <luke@dashjr.org>
To: bitcoin-development@lists.sourceforge.net
Cc: Flavien Charlon <flavien.charlon@coinprism.com>
Subject: Re: [Bitcoin-development] [BIP draft] CHECKLOCKTIMEVERIFY - Prevent a txout from being spent until an expiration time
Date: Fri, 3 Oct 2014 17:50:26 +0000	[thread overview]
Message-ID: <201410031750.27323.luke@dashjr.org> (raw)
In-Reply-To: <1987325.zKPNeYyO8K@crushinator>

On Friday, October 03, 2014 2:28:17 PM Matt Whitlock wrote:
> Is there a reason why we can't have the new opcode simply replace the top
> stack item with the block height of the txout being redeemed? Then
> arbitrary logic could be implemented, including "output cannot be spent
> until a certain time" and also "output can ONLY be spent until a certain
> time," as well as complex logic with alternative key groups with differing
> time constraints.

This cannot be done in a softfork.

Furthermore, "output can ONLY be spent until a certain time" contradict's 
Bitcoin's present security assumptions: that assuming a honest sender, the 
transaction will remain valid and simply re-confirm if a reorg kicks it out.

Luke



  parent reply	other threads:[~2014-10-03 17:50 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-01 13:08 [Bitcoin-development] [BIP draft] CHECKLOCKTIMEVERIFY - Prevent a txout from being spent until an expiration time Peter Todd
2014-10-01 15:01 ` Gavin Andresen
2014-10-02  1:06   ` Peter Todd
2014-10-01 15:29 ` Sergio Lerner
2014-10-01 17:06   ` Peter Todd
2014-10-01 18:23 ` Luke Dashjr
2014-10-01 20:58   ` Gavin Andresen
2014-10-01 21:04     ` Alan Reiner
2014-10-01 21:34       ` Gavin Andresen
2014-10-02  0:12         ` Peter Todd
2014-10-02  0:05   ` Peter Todd
2014-10-02  0:55     ` Luke Dashjr
2014-10-02  1:09       ` Peter Todd
2014-10-02 15:05         ` Flavien Charlon
2014-10-03 14:28           ` Matt Whitlock
2014-10-03 14:30             ` Matt Whitlock
2014-10-03 16:17             ` Gregory Maxwell
2014-10-03 17:50             ` Luke Dashjr [this message]
2014-10-03 20:58               ` Mike Hearn
2014-10-03 23:12                 ` Jeff Garzik
2014-10-04  0:38                   ` Peter Todd
2014-10-04 12:58                     ` Mike Hearn
2014-10-07 15:50                       ` Gavin Andresen
2014-10-07 16:08                         ` Mike Hearn
2014-10-08 10:26                           ` Wladimir
2014-10-09  3:13                             ` Alan Reiner
2014-10-09  6:14                               ` Adam Back
2014-10-09  6:28                                 ` Gregory Maxwell
2014-10-09  6:33                                   ` Peter Todd
2014-10-09  6:40                                     ` Gregory Maxwell
2014-10-08  4:07                         ` Tom Harding
2014-10-08 10:15                           ` Mike Hearn
2015-03-16 22:22 ` [Bitcoin-development] Relative CHECKLOCKTIMEVERIFY (was CLTV proposal) Matt Corallo
2015-03-19 17:39   ` Zooko Wilcox-OHearn
2015-04-21  7:59   ` Peter Todd
2015-04-26 11:35     ` Jorge Timón
2015-04-26 12:20       ` Jorge Timón
2015-04-27 19:35         ` Peter Todd
2015-04-28  7:44           ` Jorge Timón
2015-05-04  2:15     ` Matt Corallo
2015-05-04 11:24       ` Jorge Timón
2015-05-05  0:41         ` Btc Drak
2015-05-05 19:19           ` Jorge Timón
2015-05-05 20:38         ` Tier Nolan
2015-05-06  7:37           ` Jorge Timón
2015-05-06 22:09             ` Tier Nolan

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