Engineering Guide Proposes Idempotent SMS OTP Resend Design With Outbox and Bounded Evidence

A technical article on DEV Community describes how Node.js services can handle SMS one-time-password resend requests safely. It recommends treating each resend as an idempotent command tied to a single authentication challenge, recorded through a transactional outbox. The author argues that recipients should be suppressed only after permanent, identity-specific delivery failures, while transient errors are retried within the challenge deadline. The piece also estimates storage costs from delivery event volume and suggests keeping compact audit records longer than raw provider payloads. It notes that this compaction trades away packet-level forensic detail after a short window.