Function maskPhone

maskPhone(input: unknown, visibleDigits?: number): string | null
Masks a valid phone number. Short codes are fully redacted.
Parameters
- input: unknown
  Phone number.
- visibleDigits: number = 4
  Digits to leave visible at the end. Defaults to 4.
Returns string | null
The masked national number, or null if invalid. Short codes are fully masked.
Example
```
maskPhone('0771234567'); // '******4567'
```
- Defined in privacy/redaction.ts:63