import type { AppFailure } from "./errors.ts";

/**
 * The single success/failure carrier used across application input boundaries.
 * Adapters map technology-specific errors to an application failure before
 * constructing this value.
 *
 * It lives in `src/contracts` because it is shared vocabulary rather than
 * application behaviour: contracts modules describe results too, and reaching
 * up into `src/application` for the shape made the dependency between the two
 * packages point both ways. `src/application/result.ts` re-exports it.
 */
export type Result<Value, Failure = AppFailure> =
  | Readonly<{ ok: true; value: Value }>
  | Readonly<{ ok: false; error: Failure }>;