bytes() :: non_neg_integer()

init() :: {:ok, binary()} | {:error, atom()}

keypair() :: {:ok, binary(), binary()} | {:error, atom()}

open(binary(), binary()) :: {:ok, binary()} | {:error, atom()}

publickeybytes() :: non_neg_integer()

secretkeybytes() :: non_neg_integer()

seed_keypair(binary()) :: {:ok, binary(), binary()} | {:error, atom()}

seedbytes() :: non_neg_integer()

sign(binary(), binary()) :: {:ok, binary()} | {:error, atom()}

sign_detached(binary(), binary()) :: {:ok, binary()} | {:error, atom()}

sk_to_pk(binary()) :: binary()

sk_to_seed(binary()) :: binary()

verify_detached(binary(), binary(), binary()) :: :ok | {:error, atom()}