```ts
/** A store with every value starred out. */
export function hideValues(
  store: Record<string, string>,
): Record<string, string> {
  if (store === null || store === undefined) return store;

  const hidden: Record<string, string> = {};
  for (const key in store) {
    if (key === null || key === undefined) continue;
    hidden["*".repeat(key.length)] = store[key];
  }
  return hidden;
}
```