Fix clippy complaints.

src/rust/src/address_ffi.rs

@@ -50,7 +50,7 @@ impl FromAddress for UnifiedAddressHelper {
 }
 
 impl UnifiedAddressHelper {
-    fn to_cpp(
+    fn into_cpp(
         self,
         network: Network,
         ua_obj: Option<UnifiedAddressObj>,
@@ -145,7 +145,7 @@ pub extern "C" fn zcash_address_parse_unified(
         }
     };
 
-    ua.to_cpp(network, ua_obj, sapling_cb, p2sh_cb, p2pkh_cb, unknown_cb)
+    ua.into_cpp(network, ua_obj, sapling_cb, p2sh_cb, p2pkh_cb, unknown_cb)
 }
 
 #[no_mangle]

src/rust/src/history_ffi.rs

@@ -88,6 +88,7 @@ pub extern "system" fn librustzcash_mmr_append(
     )
 }
 
+#[allow(clippy::too_many_arguments)]
 fn librustzcash_mmr_append_inner<V: Version>(
     // Consensus branch id
     cbranch: u32,

src/rust/src/orchard_ffi/incremental_sinsemilla_tree_ffi.rs

@@ -2,8 +2,6 @@ use incrementalmerkletree::{
     bridgetree::{self, BridgeTree},
     Altitude, Frontier, Hashable, Tree,
 };
-use std::convert::TryFrom;
-use std::io;
 use std::mem::size_of_val;
 use std::ptr;
 
@@ -55,14 +53,7 @@ pub extern "C" fn orchard_merkle_frontier_parse(
 ) -> *mut bridgetree::Frontier<MerkleCrhOrchardOutput, MERKLE_DEPTH> {
     let reader = CppStreamReader::from_raw_parts(stream, read_cb.unwrap());
 
-    match read_frontier_v1(reader).and_then(|nf| {
-        bridgetree::Frontier::try_from(nf).map_err(|e| {
-            io::Error::new(
-                io::ErrorKind::InvalidInput,
-                format!("Parsing resulted in an invalid Merkle frontier: {:?}", e),
-            )
-        })
-    }) {
+    match read_frontier_v1(reader) {
         Ok(parsed) => Box::into_raw(Box::new(parsed)),
         Err(e) => {
             error!("Failed to parse Orchard bundle: {}", e);

src/rust/src/rustzcash.rs

@@ -946,10 +946,7 @@ pub extern "C" fn librustzcash_sapling_spend_proof(
     };
 
     // Construct the proof generation key
-    let proof_generation_key = ProofGenerationKey {
-        ak: ak.clone(),
-        nsk,
-    };
+    let proof_generation_key = ProofGenerationKey { ak, nsk };
 
     // Grab the diversifier from the caller
     let diversifier = Diversifier(unsafe { *diversifier });

src/rust/src/tests/key_agreement.rs

@@ -21,9 +21,8 @@ fn test_key_agreement() {
     let addr = loop {
         let mut d = [0; 11];
         rng.fill_bytes(&mut d);
-        match vk.to_payment_address(Diversifier(d)) {
-            Some(a) => break a,
-            None => {}
+        if let Some(a) = vk.to_payment_address(Diversifier(d)) {
+            break a;
         }
     };
 

src/rust/src/tests/signatures.rs

@@ -491,7 +491,7 @@ fn redjubjub_signatures() {
 
         {
             let mut vec = Vec::new();
-            sk.randomize(alpha.clone()).write(&mut vec).unwrap();
+            sk.randomize(alpha).write(&mut vec).unwrap();
             assert_eq!(&vec, &tv.rsk);
         }
         {