pub fn is_expired(expires: Option<&str>) -> boolExpand description
What: Check if an announcement has expired.
Inputs:
expires: Optional expiration date in ISO format (YYYY-MM-DD).
Output:
trueif expired (date has passed),falseif not expired or no expiration.
Details:
- Parses ISO date format (YYYY-MM-DD).
- Compares with today’s date (UTC).