BLIK Spike

[bborman22]

The goal of this spike is to get a sense of scope and touch points needed to enable the BLIK payment method This task should be timeboxed to about 2 days and conclude with a write up on the findings. The write up should allow us to give a more accurate estimate for effort to enable BLIK. Since we have recently gone through this process for the other payment methods, this spike doesn't need to be that in depth and rather should be used to identify any glaring differences with the payment method that could impact timelines. Some of the questions we should look to answer (include, but not limited to):

• This payment method may suffer from the same deferred intent restriction as ACSS and so we should coordinate the effort there (cc @ricardo as the engineer currently working on ACSS).
• What efforts are required through the Stripe account, if any, to enable for set up, testing, communication.
• Look for areas to reuse code
• Look for ways to "template" out this payment method process (i.e. look at previous epic task lists as a starting point, look at the relevant PRs and which files they touch)
• Ensuring the new checkout experience is supported.
• A nice to have would be a proof of concept branch to explore.