Managing Effect Layers Efficiently in an API Server Setup

app.get(
  "/:presentationId",
  sValidator(
    "param",
    Schema.standardSchemaV1(
      Schema.Struct({
        presentationId: Schema.String,
      }),
    ),
  ),
  async (c) => {
    const presentationId = c.req.valid("param").presentationId;

    const result = await Effect.runPromiseExit(
      Effect.gen(function* () {
        const questionsService = yield* QuestionsService;

        return yield* questionsService.getPageInfo(presentationId);
      }).pipe(
        Effect.provide(QuestionsServiceLive.pipe(Layer.provide(DatabaseLive))),
      ),
    );

    const value = getValueOrThrowHonoError(result, (error) => {
      Match.type<typeof error>().pipe(
        Match.tag("QuestionNotFoundError", (error) => {
          throw new HTTPException(404, {
            cause: error.cause,
            message: `Question with id ${error.questionId} not found`,
          });
        }),
        Match.orElse(() => {
          throw new HTTPException(500, {
            cause: error.cause,
            message: error.message,
          });
        }),
      )(error);
    });

    return c.json(value);
  },
);