Re: [Bitcoin-development] Providing Payment Request within URI

[Oleg Andreev <oleganza@gmail.com>]

Thanks for references. Yeah, I don't need X509 signing (if I could use certificates, I wouldn't need to include PR in the URL in the first place).

I presume you used "BITCOIN:-<payment request>" instead of "bitcoin:?r=somescheme://<payment request>" to make it more compact. 

I also tried to look up Base43, but I could not find any info on how it is specifically optimized for QR codes. Could you enlighten me?


> On 26 Feb 2015, at 10:32, Andreas Schildbach <andreas@schildbach.de> wrote:
> 
> Yeah, you'd be limited to simple usecases. X509 signing or lots of
> outputs will make the QR code hard to scan. However, if all you want to
> do is send to a custom script (without using P2SH) I invite you to have
> a look at
> 
> https://github.com/schildbach/bitcoin-wallet/blob/master/wallet/src/de/schildbach/wallet/ui/InputParser.java#L86
> 
> https://github.com/schildbach/bitcoin-wallet/blob/master/wallet/src/de/schildbach/wallet/util/Qr.java#L134
> 
> https://github.com/schildbach/bitcoin-wallet/blob/master/wallet/src/de/schildbach/wallet/util/Base43.java
> 
> Basically it's "BITCOIN:-" plus the payment request in Base43 encoded
> form. I picked Base43, because that's optimized for QR codes.
> 
> 
> On 02/24/2015 04:58 PM, Oleg Andreev wrote:
>> Hi,
>> 
>> I wonder if there is a standard way to put Payment Request data into bitcoin: URI or directly into QR code. The goal is to allow device to generate a multi-output payment request on its own, without relying on the server and x509 certificates. When scanned via QR code from, say, POS, it's pretty secure, so no additional authentication needed.
>> 
>> I'd like something like this: 
>> 
>> bitcoin:?r=data://<base64url-encoded-payment-request>
>> 
>> If there's no standard for that, would it be a good idea to extend BIP72 this way?
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>