Generating a random boolean and handling exceptions in TypeScript

const make = Effect.gen(function* (_) {
  const rand = yield* _(Random.nextBoolean)
  console.log(rand)

  if (rand === true) {
    return yield* _(Effect.fail(new BadRequestException()))
  }
  if (rand === false) {
    return yield* _(Effect.fail(new InternalServerErrorException()))
  }
})