Common Soundbox API:

These APIs retrieves a payload from a bank server, validates it based on the bank name, and decrypts it if necessary. For plaintext payloads, it proceeds directly. It fetches mapping data (if applicable) or skips this step for banks without a database. The API publishes a message, triggers the soundbox to announce the transaction amount, and attempts to store the transaction in the history table. If storage fails, it pushes the data to Pub/Sub, except for banks without a database