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

[Andreas Schildbach <andreas@schildbach.de>]

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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