Merge pull request #794 from zcash/temporary-zcashd-notecommitment-derive

Temporarily re-expose Sapling `NoteCommitment` derivation

zcash_primitives/CHANGELOG.md

@@ -7,6 +7,11 @@ and this library adheres to Rust's notion of
 
 ## [Unreleased]
 
+## [0.10.2] - 2023-03-16
+### Added
+- `zcash_primitives::sapling::note`:
+  - `NoteCommitment::temporary_zcashd_derive`
+
 ## [0.10.1] - 2023-03-08
 ### Added
 - Sapling bundle component constructors, behind the `temporary-zcashd` feature

zcash_primitives/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "zcash_primitives"
 description = "Rust implementations of the Zcash primitives"
-version = "0.10.1"
+version = "0.10.2"
 authors = [
     "Jack Grigg <jack@z.cash>",
     "Kris Nuttycombe <kris@electriccoin.co>"

zcash_primitives/src/sapling/note/commitment.rs

@@ -25,6 +25,17 @@ impl NoteCommitment {
 }
 
 impl NoteCommitment {
+    /// Derives a Sapling note commitment.
+    #[cfg(feature = "temporary-zcashd")]
+    pub fn temporary_zcashd_derive(
+        g_d: [u8; 32],
+        pk_d: [u8; 32],
+        v: NoteValue,
+        rcm: jubjub::Fr,
+    ) -> Self {
+        Self::derive(g_d, pk_d, v, NoteCommitTrapdoor(rcm))
+    }
+
     /// $NoteCommit^Sapling$.
     ///
     /// Defined in [Zcash Protocol Spec § 5.4.8.2: Windowed Pedersen commitments][concretewindowedcommit].