In the redirect flow the user is redirected to Everifin Paygate page where user can process the payment (select the bank and continue to bank SCA). In this flow:
the merchant’s system initializes the order (details here: Payment Orders) - redirect URL is in the response
redirects to URL received in step 1
payer follows Everifin GUI instructions and goes through the payment process
once the payer finishes the payment processing, she or he is redirected back to merchant system (payment ID is provided in the query parameter)
merchant can check the payment or order status using one of these endpoints:
Order status check: Get Order
Order Payment status check: Get Order Payment
Usage of Everifin GUI makes the redirect flow very simple for implementation.