Errors & Retries

When to use

• You’re defining domain errors and recovery policies
• You need to map infrastructure errors to domain boundaries
• You must add retries, backoff, jitter, and timeouts

Model Errors

import { Data } from "effect"

class ValidationError extends Data.TaggedError("ValidationError")<{ field: string; reason: string }>{}
class NotFoundError extends Data.TaggedError("NotFoundError")<{ id: string }>{}

Map/Boundary

const repoCall = Effect.fail(new ValidationError({ field: "name", reason: "empty" }))