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Date: Sat, 6 Jun 2015 23:25:02 +0200
Message-ID: <CAPswA9z_xKY6v9=Ejh=01mZN0QCVo1e0RY1FTzXzS39i3tjgAw@mail.gmail.com>
From: Kalle Rosenbaum <kalle@rosenbaum.se>
To: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [Bitcoin-development] BIP for Proof of Payment
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Thank you all for the feedback.

I will change the data structure as follows:

* There will be only one output, the "pop output", and no outputs from
T will be copied to the PoP.
* The pop output will have value 0.
* The sequence number of all inputs of the PoP will be set to 0. I
chose to set it to 0 for all inputs for simplicity.
* The lock_time of the PoP is always set to 499999999.

Any comments on this?

/Kalle

2015-06-06 19:00 GMT+02:00 Kalle Rosenbaum <kalle@rosenbaum.se>:
> 2015-06-06 18:10 GMT+02:00 Tom Harding <tomh@thinlink.com>:
>> On Jun 6, 2015 8:05 AM, "Kalle Rosenbaum" <kalle@rosenbaum.se> wrote:
>>
>>> I'm open to changes here.
>>
>> I suggest:
>>
>> - Don't include any real outputs.   They are redundant because the txid is
>> already referenced.
>
> with the nLocktime solution, the copied outputs are not needed.
>
>>
>> - Start the proof script, which should be invalid, with a magic constant and
>> include space for future expansion.  This makes PoP's easy to identify and
>> extend.
>
> I did remore the constant (a "PoP" literal ascii encoded string)
> because it didn't add much. The recipient will expect a pop, so it
> will simply treat it as one. I did add a 2 byte version field to make
> it extendable.
>
>>
>> - "Proof of Potential"
>
> Noted :-)
>
> Thank you
> /Kalle