Asynchronous programming lets an API acknowledge a request before the complete operation finishes. It keeps users from waiting through slow work such as uploading and processing large ACH files. section 4.3
A practical asynchronous file workflow separates confirmation from processing:
- Accept the uploaded file and immediately confirm successful receipt. section 12.1.1
- Process the file in stages, including related work such as OFAC scanning and account transaction posting. section 12.1.1
- Track progress with file statuses and notify the user through a dashboard, email, or text message. section 12.1.1
ACH file upload
A user submits a large ACH file. The API responds once the upload succeeds instead of waiting for scanning, transaction posting, and other remote service calls. Later, the user checks the file status or receives a notification when processing advances. section 4.3 section 12.1.1
