Create a compact web service for payments processing. Please use Java, framework of your choice (preferably Spring), and in-memory DB to store data -- 2

Requirements 1. Create POST /payments endpoint that creates payment resource. Endpoint should accept 2 mandatory fields: Field name Validation rules amount ➔ Greater than 0 debtorIban ➔ Should be a Baltic country (LT, LV, EE) account number. Regex check is fine, so is any IBAN library usage. App should assign each payment UUID and creation timestamp. 2. Create POST /payment-files endpoint that accepts CSV and creates specified payments. Example CSV: “amount”,”debtorIban” “15.0”,”LT356437978869712537” Note that payments created through POST /payment-files endpoint should also be validated according to rules described in POST /payments endpoint. 3. Create GET /payments endpoint that returns list of payments. Results should contain id, amount, debtorIban and createdAt fields. Endpoint should accept optional debtorIban filter in the query param. 4. (Optional) Resolve caller country by IP on POST /payments and POST /payment-files calls using external API of your choice. Persist resolved country with payment. Assume caller IP is present in X-Forwarded-For request header. Do not fail if IP is not present or country resolution fails.