fn from()

in akd/src/ecvrf/ecvrf_impl.rs [253:273]

• 17 lines of code
• 1 McCabe index (conditional complexity)

    fn from(private_key: &'a VRFPrivateKey) -> Self {
        let mut h: Sha512 = Sha512::default();
        let mut hash: [u8; 64] = [0u8; 64];
        let mut lower: [u8; 32] = [0u8; 32];
        let mut upper: [u8; 32] = [0u8; 32];

        h.update(private_key.0.to_bytes());
        hash.copy_from_slice(h.finalize().as_slice());

        lower.copy_from_slice(&hash[00..32]);
        upper.copy_from_slice(&hash[32..64]);

        lower[0] &= 248;
        lower[31] &= 63;
        lower[31] |= 64;

        VRFExpandedPrivateKey {
            key: ed25519_Scalar::from_bits(lower),
            nonce: upper,
        }
    }