Dynamische Payload-Validierung mit benutzerdefinierten Type-Guard-Prädikaten

interface UserProfile {
  username: string;
  age: number;
}
 
function isUserProfile(payload: unknown): payload is UserProfile {
  return (
    typeof payload === "object" &&
    payload !== null &&
    typeof (payload as Record<string, unknown>).username === "string" &&
    typeof (payload as Record<string, unknown>).age === "number"
  );
}