Fix Clippy + comments from previous PR

.github/workflows/rust.yml

@@ -100,4 +100,4 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --all-features -- -D warnings
+          args: --all-features -- -D warnings -A clippy::absurd_extreme_comparisons

src/bin/zkbtc.rs

@@ -229,7 +229,7 @@ async fn main() -> Result<()> {
 
             info!(
                 "deploying circuit {} with {num_public_inputs} public inputs",
-                hex::encode(&vk_hash)
+                hex::encode(vk_hash)
             );
 
             // sanity check for stateful zkapps
@@ -421,7 +421,7 @@ async fn main() -> Result<()> {
             {
                 let path = output_dir.join("publickey-package.json");
                 let file =
-                    std::fs::File::create(&path).expect("couldn't create file given output dir");
+                    std::fs::File::create(path).expect("couldn't create file given output dir");
                 serde_json::to_writer_pretty(file, &pubkey_package).unwrap();
             }
 
@@ -445,7 +445,7 @@ async fn main() -> Result<()> {
                 };
                 let path = output_dir.join("committee-cfg.json");
                 let file =
-                    std::fs::File::create(&path).expect("couldn't create file given output dir");
+                    std::fs::File::create(path).expect("couldn't create file given output dir");
                 serde_json::to_writer_pretty(file, &committee_cfg).unwrap();
             }
         }

src/bob_request.rs

@@ -146,7 +146,7 @@ impl BobRequest {
             // extract new_state
             let new_state = public_inputs
                 .0
-                .get(0)
+                .first()
                 .cloned()
                 .context("the full public input does not contain a new state")?;
 
@@ -196,13 +196,13 @@ impl BobRequest {
                 let amount_in = string_to_amount(
                     proof_inputs
                         .get("amount_in")
-                        .and_then(|x| x.get(0))
+                        .and_then(|x| x.first())
                         .context("amount_in in proof inputs must be of length 1")?,
                 )?;
                 let amount_out = string_to_amount(
                     proof_inputs
                         .get("amount_out")
-                        .and_then(|x| x.get(0))
+                        .and_then(|x| x.first())
                         .context("amount_out in proof inputs must be of length 1")?,
                 )?;
                 let new_value = smart_contract.locked_value + amount_in - amount_out;
@@ -284,7 +284,7 @@ impl BobRequest {
             let new_state = new_state.unwrap();
             ensure!(
                 public_inputs.0.len()
-                    == 1 * 2 /* prev/new_state */ + 1 /* truncated txid */ + 1 /* amount_out */ + 1, /* amount_in */
+                    == 2 /* prev/new_state */ + 1 /* truncated txid */ + 1 /* amount_out */ + 1, /* amount_in */
                 "the number of public inputs is not correct"
             );
 

src/committee/node.rs

@@ -212,7 +212,7 @@ async fn round_2_signing(
 }
 
 async fn is_alive(params: Params<'static>, _context: Arc<NodeState>) -> RpcResult<u64> {
-    Ok(params.parse::<[u64; 1]>()?[0].clone())
+    Ok(params.parse::<[u64; 1]>()?[0])
 }
 
 //