Update ShieldedOutput to return reference for enc_ciphertext

These changes were discussed and suggested in PR zcash_note_encryption#2

Cargo.toml

@@ -43,7 +43,7 @@ reddsa = "0.5"
 nonempty = "0.7"
 serde = { version = "1.0", features = ["derive"] }
 subtle = "2.3"
-zcash_note_encryption_zsa = { package = "zcash_note_encryption", version = "0.4", git = "https://github.com/QED-it/zcash_note_encryption", branch = "zsa1" }
+zcash_note_encryption_zsa = { package = "zcash_note_encryption", version = "0.4", git = "https://github.com/QED-it/zcash_note_encryption", branch = "return-ref-from-enc-ciphertext" }
 incrementalmerkletree = "0.5"
 zcash_spec = "0.1"
 zip32 = "0.1"
@@ -60,7 +60,7 @@ bridgetree = "0.4"
 criterion = "0.4" # 0.5 depends on clap 4 which has MSRV 1.70
 halo2_gadgets = { git = "https://github.com/QED-it/halo2", rev = "7f5c0babd61f8ca46c9165a1adfac298d3fd3a11", features = ["test-dependencies"] }
 proptest = "1.0.0"
-zcash_note_encryption_zsa = { package = "zcash_note_encryption", version = "0.4", git = "https://github.com/QED-it/zcash_note_encryption", branch = "zsa1", features = ["pre-zip-212"] }
+zcash_note_encryption_zsa = { package = "zcash_note_encryption", version = "0.4", git = "https://github.com/QED-it/zcash_note_encryption", branch = "return-ref-from-enc-ciphertext", features = ["pre-zip-212"] }
 incrementalmerkletree = { version = "0.5", features = ["test-dependencies"] }
 ahash = "=0.8.6" #Pinned: 0.8.7 depends on Rust 1.72
 

src/note_encryption/compact_action.rs

@@ -20,8 +20,8 @@ impl<A, D: OrchardDomainCommon> ShieldedOutput<OrchardDomain<D>> for Action<A, D
         self.cmx().to_bytes()
     }
 
-    fn enc_ciphertext(&self) -> Option<D::NoteCiphertextBytes> {
-        Some(self.encrypted_note().enc_ciphertext)
+    fn enc_ciphertext(&self) -> Option<&D::NoteCiphertextBytes> {
+        Some(&self.encrypted_note().enc_ciphertext)
     }
 
     fn enc_ciphertext_compact(&self) -> D::CompactNoteCiphertextBytes {
@@ -69,7 +69,7 @@ impl<D: OrchardDomainCommon> ShieldedOutput<OrchardDomain<D>> for CompactAction<
         self.cmx.to_bytes()
     }
 
-    fn enc_ciphertext(&self) -> Option<D::NoteCiphertextBytes> {
+    fn enc_ciphertext(&self) -> Option<&D::NoteCiphertextBytes> {
         None
     }