class Eth::Key

def initialize(priv: nil)
  # Creates a new, randomized libsecp256k1 context.
  ctx = Secp256k1::Context.new context_randomization_bytes: SecureRandom.random_bytes(32)
  # Creates a new random key pair (public, private).
  key = ctx.generate_key_pair
  unless priv.nil?
    # Converts hex private keys to binary strings.
    priv = Util.hex_to_bin priv if Util.is_hex? priv
    # Creates a keypair from existing private key data.
    key = ctx.key_pair_from_private_key priv
  end
  # Sets the attributes.
  @private_key = key.private_key
  @public_key = key.public_key
end