Function crypto_kx_seed_keypair 

pub fn crypto_kx_seed_keypair(
    seed: &[u8; 32],
) -> Result<(PublicKey, SecretKey), Error>

Computes and returns a keypair of (PublicKey, SecretKey) based on seed upon success. Uses the Blake2b function to derive a secret from seed.

Compatible with libsodium’s crypto_kx_seed_keypair.

Errors

Returns an error if the underlying generic hash rejects the output. The fixed output length used here is valid.