module Nostr
  class Crypto
    BN_BASE: 0 | 2 | 10 | 16
    CIPHER_CURVE: String
    CIPHER_ALGORITHM: String

    def encrypt_text: (PrivateKey, PublicKey, String) -> String
    def decrypt_text: (PrivateKey, PublicKey, String) -> String
    def sign_event: (Event, PrivateKey) -> Event

    private

    def compute_shared_key: (PrivateKey, PublicKey) -> String
    def hash_event:(Event) -> String
  end
end