You hit the nail on the head! Moving to AWS Lambda is exactly why webhooks are a total game-changer here.
While WebSockets are amazing for that 'instant' feel in a UI, they’re a bit of a headache to keep alive in a serverless environment. From a profitability and scale perspective, I’d much rather have a stateless webhook trigger my logic only when money actually moves. It saves on idle compute costs and, honestly, the built-in retry logic with webhooks is a lifesaver for financial apps where you can't afford to miss a single 'paid' event.
I’m diving into the Python SDK this weekend anyway—if webhooks make it onto the roadmap, I'd love to build out a clean 'Serverless Payments' boilerplate to show how lean and cost-efficient this setup can really be.
Great work on the SDK so far, the DX (Developer Experience) is already feeling solid!