this post was submitted on 09 Nov 2023
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Oh, add an
?amount=32โฌas well as atext=Pizzaparameter and you're almost there ...Separate
?amount=32andcurrency=Euroto add currency support.I thought about that, but I think it's actually more error prone, because people might just be setting
?amount=32and leaving outcurrencywhich might lead to unexpected behaviour. Implementors tend to interpret this differently and one app might take the default currency and the other might fail to accept it, and that kind of different behaviour is a common source of security issues. Having a single unified parameter that must always contain the value and currency "solves" that issue.Makes it a bit more annoying to parse, though I definitely see your point.
However, you're still proposing a standard: "has to include both the currency and the amount in the parameter", so why not split them up at that point?
Dammit we've just made UPI
Idont't think that's a good idea, too many peoplr quickly pressing pay and then they tealizef only afyer paying thay there's an extra 0
There's still plenty of steps that your bank app can (and will) take to verify this is as intended. Requiring the user to "parse" the URI is not scalable anyway, the app needs to present the information clearly (i.e. "Do you really want to transfer 123.45โฌ to IBAN abcd, you have not transferred money to this IBAN before, the IBAN indicates a bank in " where the money amount is clearly highlighted).
I agree, still having to input the money manually is the best failsafe, how many people are used to just automatically hitting whatever button to make a message go away for example (even more with the cookies), best failsafe is inputting the money manually, you'd never mistakenly/automatically do that.
You know, it's good to put failsafes and all, but at some point it's just PEBKAC.
Ah yes, PEBKAC, the most common error after ID-10T.