On Sat, Feb 21, 2015 at 10:25 PM, Jorge Timón <jti...@jtimon.cc> wrote:
> On Sat, Feb 21, 2015 at 11:47 PM, Jeff Garzik <jgar...@bitpay.com> wrote:
>> This isn't some theoretical exercise.  Like it or not many use
>> insecure 0-conf transactions for rapid payments.  Deploying something
>> that makes 0-conf transactions unusable would have a wide, negative
>> impact on present day bitcoin payments, thus "scorched earth"

> And maybe by maintaining first seen policies we're harming the system
> in the long term by encouraging people to widely deploy systems based
> on extremely weak assumptions.

Lacking a coded, reviewed alternative, that's only a platitude.
Widely used 0-conf payments are where we're at today.  Simply ceasing
the "maintaining [of] first seen policies" alone is simply not a
realistic option.  The negative impact to today's userbase would be

Instant payments need a security upgrade, yes.

Jeff Garzik
Bitcoin core developer and open source evangelist
BitPay, Inc.      https://bitpay.com/

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