idsmith 0.5.4

Validate and generate checksum-correct IBANs, personal IDs, bank accounts, credit cards, SWIFT/BIC, company IDs, driver's licenses, tax IDs, and passports.
Documentation 
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use rand::Rng;

pub fn generate(rng: &mut rand::rngs::ThreadRng) -> String {
    let len = rng.gen_range(4..=12);
    (0..len)
        .map(|_| (b'0' + rng.gen_range(0..=9u8)) as char)
        .collect()
}

pub fn validate(code: &str) -> bool {
    let clean = code
        .replace(['.', ' '], "")
        .trim_start_matches('0')
        .to_string();
    clean.len() >= 4 && clean.len() <= 12 && clean.chars().all(|c| c.is_ascii_digit())
}