Function get_signature_from_assertion

bitvm/src/chunk/api_runtime_utils.rs:298–328

wots sign byte array using secrets mirror of get_assertions_from_signature

(assn: Assertions, secrets: Vec<String>)

// wots sign byte array using secrets
// mirror of get_assertions_from_signature
pub(crate) fn get_signature_from_assertion(assn: Assertions, secrets: Vec<String>) -> Signatures {
    println!("get_signature_from_assertion");
    // sign and return Signatures
    let (ps, fs, hs) = (assn.0, assn.1, assn.2);

    let mut psig: Vec<<Wots32 as Wots>::Signature> = vec![];
    for i in 0..NUM_PUBS {
        let secret = Wots32::secret_from_str(secrets[i].as_str());
        let psi = Wots32::sign(&secret, &ps[i]);
        psig.push(psi);
    }
    let psig: Box<[<Wots32 as Wots>::Signature; NUM_PUBS]> = Box::new(psig.try_into().unwrap());

    let mut fsig: Vec<<Wots32 as Wots>::Signature> = vec![];
    for i in 0..fs.len() {
        let secret = Wots32::secret_from_str(secrets[i + NUM_PUBS].as_str());
        let fsi = Wots32::sign(&secret, &fs[i]);
        fsig.push(fsi);
    }
    let fsig: Box<[<Wots32 as Wots>::Signature; NUM_U256]> = Box::new(fsig.try_into().unwrap());

    let mut hsig: Vec<<Wots16 as Wots>::Signature> = vec![];
    for i in 0..hs.len() {
        let secret = Wots16::secret_from_str(secrets[i + NUM_PUBS + NUM_U256].as_str());
        let hsi = Wots16::sign(&secret, &hs[i]);
        hsig.push(hsi);
    }
    let hsig: Box<[<Wots16 as Wots>::Signature; NUM_HASH]> = Box::new(hsig.try_into().unwrap());

    (psig, fsig, hsig)
}

// decode signature to assertion
// mirror of get_signature_from_assertion