message: Make some methods in DiversifierKey, DiversiferIndex pub
diff: @@ -94,7 +94,7 @@ struct ChainCode([u8; 32]);
  pub struct DiversifierIndex(pub [u8; 11]);
  impl DiversifierIndex {
  - fn new() -> Self {
  + pub fn new() -> Self {
  DiversifierIndex([0; 11])
  }
  @@ -113,10 +113,10 @@ impl DiversifierIndex {
  /// A key used to derive diversifiers for a particular child key
  #[derive(Clone, Copy, Debug, PartialEq)]
  -struct DiversifierKey([u8; 32]);
  +pub struct DiversifierKey(pub [u8; 32]);
  impl DiversifierKey {
  - fn master(sk_m: &[u8]) -> Self {
  + pub fn master(sk_m: &[u8]) -> Self {
  let mut dk_m = [0u8; 32];
  dk_m.copy_from_slice(&prf_expand(sk_m, &[0x10]).as_bytes()[..32]);
  DiversifierKey(dk_m)
  @@ -131,7 +131,7 @@ impl DiversifierKey {
  /// Returns the first index starting from j that generates a valid
  /// diversifier, along with the corresponding diversifier. Returns
  /// an error if the diversifier space is exhausted.
  - fn diversifier(&self, mut j: DiversifierIndex) -> Result<(DiversifierIndex, Diversifier), ()> {
  + pub fn diversifier(&self, mut j: DiversifierIndex) -> Result<(DiversifierIndex, Diversifier), ()> {
  let ff = FF1::<Aes256>::new(&self.0, 2).unwrap();
  loop {
  // Generate d_j
  