Function olm_sys::olm_pk_signing_key_from_seed

pub unsafe extern "C" fn olm_pk_signing_key_from_seed(
    sign: *mut OlmPkSigning, 
    pubkey: *mut c_void, 
    pubkey_length: usize, 
    seed: *const c_void, 
    seed_length: usize
) -> usize

Initialise the signing object with a public/private keypair from a seed. The associated public key will be written to the pubkey buffer. Returns olm_error() on failure. If the public key buffer is too small then olm_pk_signing_last_error() will be “OUTPUT_BUFFER_TOO_SMALL”. If the seed buffer is too small then olm_pk_signing_last_error() will be “INPUT_BUFFER_TOO_SMALL”.