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Subject: Re: [Bitcoin-development] Payment Protocol for Face-to-face Payments
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Afaik, BIP73 needs an external server (the web server).
On 03/20/2014 04:31 AM, Jeff Garzik wrote:
> Take a look at BIP 73:
> https://github.com/bitcoin/bips/blob/master/bip-0073.mediawiki
>
>
>
>
> On Wed, Mar 19, 2014 at 10:22 PM, Alex Kotenko <alexykot@gmail.com
> <mailto:alexykot@gmail.com>> wrote:
>
> Hi Andreas
>
>
> I'm implementing support for BIP70 in my POS at the moment, and I've
> just realized that with options you're proposing usecase I'm looking
> for is not covered.
>
> Right now, before BIP70, I'm sending BIP21 URI via NFC or QR code,
> and I need to still be able to use it for backwards compatibility.
> But at the same time I want to be able to support BIP70. And also I
> want to avoid using external servers, the concept of my POS is that
> everything is happening between just payer's phone and payee's POS
> device. This means that BIP72 HTTP(S) link inside Bitcoin URI is not
> suitable for me.
>
> You're also offering an option to include Base43 encoded PR body
> right inside the Bitcoin URI, but in a way that is not backwards
> compatible with BIP21.
>
> In the end this all means that there is no way for me to at the same
> time keep backwards compatibility with all wallets not supporting
> NFC and BIP70 (all other wallets right now), and keep things inside
> POS without need for external servers.
>
> I understand your intention behind base43 encoding and noncompatible
> URI - you want to make most possible use of QR codes. But I wonder -
> did you compare this base43 to base64 encoded request in a binary QR
> code format? How much do we actually win in total bytes capacity at
> a price of noncompatibility and increased complexity?
>
> And also maybe we can extend BIP72 to include encoded payment
> request in the URL directly in a backwards compatible way?
>
>
> Best regards,
> Alex Kotenko
>
>
> 2014-03-02 11:50 GMT+00:00 Mike Hearn <mike@plan99.net
> <mailto:mike@plan99.net>>:
>
> Thanks Andreas.
>
> For BIP standardisation, I think the VIEW intent seems like an
> obvious one. Bluetooth support probably should come later
> if/when we put encryption/auth on the RFCOMM link (probably SSL).
>
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> --
> Jeff Garzik
> Bitcoin core developer and open source evangelist
> BitPay, Inc. https://bitpay.com/
>
>
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