message: allow Copy/Clone for the HDWalletScheme,
diff: @@ -24,7 +24,7 @@ pub fn directory( root_dir: PathBuf
  /// and randomly selected indices (this will force us to encrypt the derivation
  /// path in the address, making the address longer and increasing the fee sligthly)
  ///
  -#[derive(Debug, Serialize, Deserialize)]
  +#[derive(Debug, Serialize, Deserialize, Copy, Clone)]
  pub enum HDWalletModel {
  BIP44,
  RandomIndex2Levels
  