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// TypeScript playground
type Result<T, E = Error> =
  | { ok: true; value: T }
  | { ok: false; error: E };

async function fetchUser(id: string): Promise<Result<{ name: string; email: string }>> {
  try {
    // Simulated fetch
    const user = { name: "Ada Lovelace", email: "ada@workplace.dev" };
    return { ok: true, value: user };
  } catch (e) {
    return { ok: false, error: e as Error };
  }
}

const result = await fetchUser("u1");
if (result.ok) {
  console.log("User:", result.value.name);
} else {
  console.error("Error:", result.error.message);
}

output

// Output will appear here after you run the code.