message: fix SecretKey::generate_ed25519
diff: @@ -91,9 +91,9 @@ pub trait AsymmetricKeyExt: Sized {
  impl AsymmetricKeyExt for SecretKey {
  fn generate_ed25519() -> Result<Self, Error> {
  - let mut bytes = [0u8; Self::SECP256K1_LENGTH];
  + let mut bytes = [0u8; Self::ED25519_LENGTH];
  getrandom::getrandom(&mut bytes[..]).expect("RNG failure!");
  - Ok(SecretKey::secp256k1(bytes))
  + Ok(SecretKey::ed25519(bytes))
  }
  fn generate_secp256k1() -> Result<Self, Error> {
  