better-result-adopt

A typed Result pattern replaces ad-hoc exceptions with Result chains and TaggedError domain errors. You migrate by wrapping IO boundaries using Result.try and tryPromise, transforming Promise rejections into predictable typed errors.

The best way to refactor Promise rejections is applying a boundary-first strategy. Start at IO boundaries like API calls and DB access, wrap them with Result.tryPromise, define TaggedError classes, and propagate errors inward as typed Result<T, E> return types.

Railway oriented programming in TypeScript routes errors through dedicated channels using Result chains instead of exceptions. By defining TaggedError domain errors and returning Result<T, E> types, applications propagate failures predictably without interrupting standard execution flow.

You should use TaggedError definitions over standard exceptions when you need centralized domain errors and improved debuggability. Defining TaggedError classes allows you to propagate failures as typed Result<T, E> objects, reducing unpredictable runtime errors across microservices.

Yes, you can use better-result to refactor callbacks and exceptions in a microservice. It provides practical templates to centralize domain errors, transforming ad-hoc exception handling into typed Result chains to improve observability and type-safety.