Function encapsulate 

pub fn encapsulate<Ciphertext: NewByteArray<{ CRYPTO_KEM_XWING_CIPHERTEXTBYTES }>, SharedSecret: NewByteArray<{ CRYPTO_KEM_XWING_SHAREDSECRETBYTES }>, PublicKey: ByteArray<{ CRYPTO_KEM_XWING_PUBLICKEYBYTES }>>(
    public_key: &PublicKey,
) -> Result<(Ciphertext, SharedSecret), Error>

Creates a random shared secret for public_key, returning the X-Wing ciphertext to send to its owner and the shared secret.

Errors

Returns Error::InvalidKey if public_key is not a valid public key.