Re: [Taler] Android Taler Wallet bug

[Jonathan Krebs]

On 09.01.24 21:16, Marc Stibane via Taler wrote:
> > On 2024-01-09, at 20:57:20, Slack Coder <slackcoder@server.ky> wrote:
> >
> > > What problem?
> >
> > When the same fulfillment URL is used for a second order, it results in an "You've 
> > already paid for this purchase" error.  This feels unexpected because its an 
> > entirely different order.


> 1) May a fulfillment URI be reused?

No: 
https://docs.taler.net/taler-merchant-api-tutorial.html#repurchase-detection-and-fulfillment-urls

> To ensure this mechanism works as designed, merchants must make sure 
to not use the same fulfillment URL for different products or for 
physical products where customers may be expected to buy the article 
repeatedly. Similarly, it is crucial that merchants consistently use the 
same fulfillment URL for the same digital product where repurchase 
detection is desired.


You can use the token $ORDER_ID in the fulillement url when creating the 
order, it gets replaced by the merchant backend with the actual order 
id, to create a unique url.