Your question is Design a Payment Processor. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design a payment service provider or payment processor for an e-commerce customer at Adyen. Clarify the merchant, shopper, payment method, authorization, fraud, settlement, and compliance requirements before proposing the architecture. Address where ML is appropriate, online versus batch processing, scale assumptions, latency, evaluation, monitoring, and failure recovery.