Struct Last4Redactor 

pub struct Last4Redactor;

Redact all but the last 4 characters.

Useful for tokens, card numbers, or other identifiers where seeing the last few characters helps with identification.

Always shows at least 4 asterisks to avoid leaking information about short values or value length.

use apollo_redaction::Redacted;
use apollo_redaction::strategy::Last4Redactor;

fn last4(input: &str) -> String {
    Redacted::<_, Last4Redactor>::new(input).to_string()
}

assert_eq!(last4("1234567890"), "******7890");
assert_eq!(last4("abc"), "****");
assert_eq!(last4("4242424242424242"), "************4242");

Trait Implementations

impl Clone for Last4Redactor

fn clone(&self) -> Last4Redactor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for Last4Redactor

fn default() -> Last4Redactor

Returns the “default value” for a type.

impl<T: AsRef<str>> RedactionStrategy<T> for Last4Redactor

fn display(&self, value: &T, f: &mut Formatter<'_>) -> Result

How to redact the value for the Display ({}) implementation.

fn debug(&self, value: &T, f: &mut Formatter<'_>) -> Result

How to redact the value for the Debug ({:?}) implementation. By default, this delegates to RedactionStrategy::display.