zcash_primitives: Remove `keys` module

zcash_client_backend/src/decrypt.rs

@@ -41,7 +41,7 @@ pub struct DecryptedOutput<Note> {
     /// True if this output was recovered using an [`OutgoingViewingKey`], meaning that
     /// this is a logical output of the transaction.
     ///
-    /// [`OutgoingViewingKey`]: zcash_primitives::keys::OutgoingViewingKey
+    /// [`OutgoingViewingKey`]: sapling::keys::OutgoingViewingKey
     pub transfer_type: TransferType,
 }
 

zcash_primitives/CHANGELOG.md

@@ -110,8 +110,10 @@ and this library adheres to Rust's notion of
 ### Removed
 - `zcash_primitives::constants`:
   - All `const` values (moved to `sapling_crypto::constants`).
-- `zcash_primitives::keys`:
+- `zcash_primitives::keys` module, as it was empty after the removal of:
   - `PRF_EXPAND_PERSONALIZATION`
+  - `OutgoingViewingKey` (use `sapling_crypto::keys::OutgoingViewingKey`
+    instead).
   - `prf_expand, prf_expand_vec` (use `zcash_spec::PrfExpand` instead).
 - `zcash_primitives::sapling` module (use the `sapling-crypto` crate instead).
 - `zcash_primitives::transaction::components::sapling`:

zcash_primitives/src/keys.rs

@@ -1 +0,0 @@
-pub use crate::sapling::keys::OutgoingViewingKey;

zcash_primitives/src/lib.rs

@@ -15,7 +15,6 @@
 pub mod block;
 pub mod consensus;
 pub mod constants;
-pub mod keys;
 pub mod legacy;
 pub mod memo;
 pub mod merkle_tree;