src/proof.rs

use sha2::{Digest, Sha256};
use crate::shield::redact::PiiMatch;

pub fn generate_proof(original: &str, pii_map: &[PiiMatch]) -> String {
    let mut hasher = Sha256::new();
    hasher.update(original.as_bytes());
    for m in pii_map {
        hasher.update(m.entity_type.as_bytes());
        hasher.update(m.original.as_bytes());
        hasher.update(m.placeholder.as_bytes());
    }
    hex::encode(hasher.finalize())
}