TPP-XS2A APIs
There are no plans to offer Embedded Flow. But maybe it will be possible with EU DI Wallet / SCA. From Commerzbank's point of view, this SCA approach should also be offered to TPPs in a "direct" usage approach. (SCA should be possible directly between TPP as a relying party and EU DI wallet. Same or cross device.)
App2app is currently not supported and we do not plan to support it in the future.
As long as the customer has not yet approved the payment and the execution has already started, you can cancel the payment in parallel. The payment cannot be cancelled when it has already been cancelled, executed or is getting executed. (You can then continue your process as normal, which is usually checking the status of the payment and manage the customer process accordingly.)
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