Fix clippy warnings (#597)

* removed unneeded unit return type

* borrowed a reference that immediately got dereferenced by the compiler

* deleted unnecessary closure for substituting value for `Option::None`

* replace match block with `matches!` macro instead

* use unwrap_or_else instead to avoid potentially side effects

* no need to use question mark here becuase execution of the body will end up there anyway

* borrowed a reference that immediately got dereferenced by the compiler

* borrowed a reference that immediately got dereferenced by the compiler

* when replacing a value of type `T` with `T::default()` std::mem::take is a better option

* use the map function instead of implenting it manually

* use `.is_empty()` instead of checking the length is bigger then 0

* use `.is_some()` and `is_none()` instead of creating an unused variable

* implementing the `From` Trait and we will get the `Into` for free

* add `Default`

* declare it as u64 instead of cast it to u64

* deleted unnecessary clone

* use `assert!` for booleans comparisons

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

src/api/accounts.rs

@@ -136,7 +136,7 @@ mod accounts_signing {
             let message_hash = self.hash_message(message);
 
             let signature = key
-                .sign(&message_hash.as_bytes(), None)
+                .sign(message_hash.as_bytes(), None)
                 .expect("hash is non-zero 32-bytes; qed");
             let v = signature
                 .v
@@ -179,7 +179,7 @@ mod accounts_signing {
             };
             let (signature, recovery_id) = recovery
                 .as_signature()
-                .ok_or_else(|| error::Error::Recovery(signing::RecoveryError::InvalidSignature))?;
+                .ok_or(error::Error::Recovery(signing::RecoveryError::InvalidSignature))?;
             let address = signing::recover(message_hash.as_bytes(), &signature, recovery_id)?;
             Ok(address)
         }
@@ -278,13 +278,13 @@ mod accounts_signing {
             stream
         }
 
-        fn rlp_append_signature(&self, stream: &mut RlpStream, signature: &Signature) -> () {
+        fn rlp_append_signature(&self, stream: &mut RlpStream, signature: &Signature) {
             stream.append(&signature.v);
             stream.append(&U256::from_big_endian(signature.r.as_bytes()));
             stream.append(&U256::from_big_endian(signature.s.as_bytes()));
         }
 
-        fn rlp_append_access_list(&self, stream: &mut RlpStream) -> () {
+        fn rlp_append_access_list(&self, stream: &mut RlpStream) {
             stream.begin_list(self.access_list.len());
             for access in self.access_list.iter() {
                 stream.begin_list(2);
@@ -323,10 +323,7 @@ mod accounts_signing {
 
         /// Sign and return a raw signed transaction.
         pub fn sign(self, sign: impl signing::Key, chain_id: u64) -> SignedTransaction {
-            let adjust_v_value = match self.transaction_type.map(|t| t.as_u64()) {
-                Some(LEGACY_TX_ID) | None => true,
-                _ => false,
-            };
+            let adjust_v_value = matches!(self.transaction_type.map(|t| t.as_u64()), Some(LEGACY_TX_ID) | None);
 
             let encoded = self.encode(chain_id, None);
 

src/api/parity.rs

@@ -138,7 +138,7 @@ mod tests {
         ParityPendingTransactionFilter::builder()
             .from(Address::from_low_u64_be(0x32))
             .gas(U64::from(100_000))
-            .gas_price(FilterCondition::GreaterThan(U64::from(100_000_000_000 as u64)))
+            .gas_price(FilterCondition::GreaterThan(U64::from(100_000_000_000_u64)))
             .build()
          => "parity_pendingTransactions",
             vec![r#"1"#, r#"{"from":{"eq":"0x0000000000000000000000000000000000000032"},"gas":{"eq":"0x186a0"},"gas_price":{"gt":"0x174876e800"}}"#]

src/contract/deploy.rs

@@ -130,9 +130,9 @@ impl<T: Transport> Builder<T> {
             let tx = TransactionParameters {
                 nonce: tx.nonce,
                 to: tx.to,
-                gas: tx.gas.unwrap_or(1_000_000.into()),
+                gas: tx.gas.unwrap_or_else(|| 1_000_000.into()),
                 gas_price: tx.gas_price,
-                value: tx.value.unwrap_or(0.into()),
+                value: tx.value.unwrap_or_else(|| 0.into()),
                 data: tx
                     .data
                     .expect("Tried to deploy a contract but transaction data wasn't set"),

src/contract/mod.rs

@@ -319,9 +319,7 @@ impl<T: Transport> Contract<T> {
                     data: l.data.0,
                 })?;
 
-                Ok(R::from_tokens(
-                    log.params.into_iter().map(|x| x.value).collect::<Vec<_>>(),
-                )?)
+                R::from_tokens(log.params.into_iter().map(|x| x.value).collect::<Vec<_>>())
             })
             .collect::<Result<Vec<R>>>()
     }

src/signing.rs

@@ -94,13 +94,13 @@ mod feature_gated {
         type Target = SecretKey;
 
         fn deref(&self) -> &Self::Target {
-            &self.key
+            self.key
         }
     }
 
     impl<T: Deref<Target = SecretKey>> Key for T {
         fn sign(&self, message: &[u8], chain_id: Option<u64>) -> Result<Signature, SigningError> {
-            let message = Message::from_slice(&message).map_err(|_| SigningError::InvalidMessage)?;
+            let message = Message::from_slice(message).map_err(|_| SigningError::InvalidMessage)?;
             let (recovery_id, signature) = CONTEXT.sign_ecdsa_recoverable(&message, self).serialize_compact();
 
             let standard_v = recovery_id.to_i32() as u64;
@@ -118,7 +118,7 @@ mod feature_gated {
         }
 
         fn sign_message(&self, message: &[u8]) -> Result<Signature, SigningError> {
-            let message = Message::from_slice(&message).map_err(|_| SigningError::InvalidMessage)?;
+            let message = Message::from_slice(message).map_err(|_| SigningError::InvalidMessage)?;
             let (recovery_id, signature) = CONTEXT.sign_ecdsa_recoverable(&message, self).serialize_compact();
 
             let v = recovery_id.to_i32() as u64;
@@ -140,7 +140,7 @@ mod feature_gated {
         let message = Message::from_slice(message).map_err(|_| RecoveryError::InvalidMessage)?;
         let recovery_id = RecoveryId::from_i32(recovery_id).map_err(|_| RecoveryError::InvalidSignature)?;
         let signature =
-            RecoverableSignature::from_compact(&signature, recovery_id).map_err(|_| RecoveryError::InvalidSignature)?;
+            RecoverableSignature::from_compact(signature, recovery_id).map_err(|_| RecoveryError::InvalidSignature)?;
         let public_key = CONTEXT
             .recover_ecdsa(&message, &signature)
             .map_err(|_| RecoveryError::InvalidSignature)?;

src/transports/batch.rs

@@ -10,7 +10,7 @@ use futures::{
     Future, FutureExt,
 };
 use parking_lot::Mutex;
-use std::{collections::BTreeMap, mem, pin::Pin, sync::Arc};
+use std::{collections::BTreeMap, pin::Pin, sync::Arc};
 
 type Pending = oneshot::Sender<error::Result<rpc::Value>>;
 type PendingRequests = Arc<Mutex<BTreeMap<RequestId, Pending>>>;
@@ -38,7 +38,7 @@ where
 
     /// Sends all requests as a batch.
     pub fn submit_batch(&self) -> impl Future<Output = error::Result<Vec<error::Result<rpc::Value>>>> {
-        let batch = mem::replace(&mut *self.batch.lock(), vec![]);
+        let batch = std::mem::take(&mut *self.batch.lock());
         let ids = batch.iter().map(|&(id, _)| id).collect::<Vec<_>>();
 
         let batch = self.transport.send_batch(batch);

src/transports/ipc.rs

@@ -173,17 +173,17 @@ async fn run_server(unix_stream: UnixStream, messages_rx: UnboundedReceiverStrea
     let mut read_buffer = vec![];
     let mut closed = false;
 
-    while !closed || pending_response_txs.len() > 0 {
+    while !closed || !pending_response_txs.is_empty() {
         tokio::select! {
             message = messages_rx.next() => match message {
                 None => closed = true,
                 Some(TransportMessage::Subscribe(id, tx)) => {
-                    if let Some(_) = subscription_txs.insert(id.clone(), tx) {
+                    if subscription_txs.insert(id.clone(), tx).is_some() {
                         log::warn!("Replacing a subscription with id {:?}", id);
                     }
                 },
                 Some(TransportMessage::Unsubscribe(id)) => {
-                    if let None = subscription_txs.remove(&id) {
+                    if subscription_txs.remove(&id).is_none() {
                         log::warn!("Unsubscribing not subscribed id {:?}", id);
                     }
                 },

src/transports/ws.rs

@@ -161,14 +161,12 @@ impl WsServerTask {
                 .to_vec()
         });
 
-        let headers = if let Some(ref head) = maybe_encoded {
-            Some([soketto::handshake::client::Header {
+        let headers = maybe_encoded.as_ref().map(|head| {
+            [soketto::handshake::client::Header {
                 name: "Authorization",
-                value: &head,
-            }])
-        } else {
-            None
-        };
+                value: head,
+            }]
+        });
 
         if let Some(ref head) = headers {
             client.set_headers(head);

src/types/block.rs

@@ -306,7 +306,7 @@ mod tests {
           }
         );
 
-        let block: Block<()> = serde_json::from_value(json.clone()).unwrap();
+        let block: Block<()> = serde_json::from_value(json).unwrap();
         assert_eq!(block.base_fee_per_gas, Some(U256::from(7)));
     }
 

src/types/log.rs

@@ -210,7 +210,7 @@ mod tests {
             log_type: None,
             removed: Some(true),
         };
-        assert_eq!(true, log.is_removed());
+        assert!(log.is_removed());
     }
 
     #[test]
@@ -228,7 +228,7 @@ mod tests {
             log_type: None,
             removed: Some(false),
         };
-        assert_eq!(false, log.is_removed());
+        assert!(!log.is_removed());
     }
 
     #[test]
@@ -246,7 +246,7 @@ mod tests {
             log_type: Some("removed".into()),
             removed: None,
         };
-        assert_eq!(true, log.is_removed());
+        assert!(log.is_removed());
     }
 
     #[test]
@@ -264,7 +264,7 @@ mod tests {
             log_type: Some("mined".into()),
             removed: None,
         };
-        assert_eq!(false, log.is_removed());
+        assert!(!log.is_removed());
     }
 
     #[test]
@@ -282,7 +282,7 @@ mod tests {
             log_type: None,
             removed: None,
         };
-        assert_eq!(false, log.is_removed());
+        assert!(!log.is_removed());
     }
 
     #[test]

src/types/signed.rs

@@ -107,19 +107,19 @@ impl From<CallRequest> for TransactionParameters {
     }
 }
 
-impl Into<CallRequest> for TransactionParameters {
-    fn into(self) -> CallRequest {
+impl From<TransactionParameters> for CallRequest {
+    fn from(val: TransactionParameters) -> Self {
         CallRequest {
             from: None,
-            to: self.to,
-            gas: Some(self.gas),
-            gas_price: self.gas_price,
-            value: Some(self.value),
-            data: Some(self.data),
-            transaction_type: self.transaction_type,
-            access_list: self.access_list,
-            max_fee_per_gas: self.max_fee_per_gas,
-            max_priority_fee_per_gas: self.max_priority_fee_per_gas,
+            to: val.to,
+            gas: Some(val.gas),
+            gas_price: val.gas_price,
+            value: Some(val.value),
+            data: Some(val.data),
+            transaction_type: val.transaction_type,
+            access_list: val.access_list,
+            max_fee_per_gas: val.max_fee_per_gas,
+            max_priority_fee_per_gas: val.max_priority_fee_per_gas,
         }
     }
 }

src/types/transaction_request.rs

@@ -49,7 +49,7 @@ impl CallRequest {
 }
 
 /// Call Request Builder
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Default)]
 pub struct CallRequestBuilder {
     call_request: CallRequest,
 }
@@ -165,7 +165,7 @@ impl TransactionRequest {
 }
 
 /// Transaction Request Builder
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Default)]
 pub struct TransactionRequestBuilder {
     transaction_request: TransactionRequest,
 }
@@ -296,7 +296,7 @@ mod tests {
   "value": "0x4c4b40",
   "data": "0x010203"
 }"#;
-        let deserialized: CallRequest = serde_json::from_str(&serialized).unwrap();
+        let deserialized: CallRequest = serde_json::from_str(serialized).unwrap();
 
         assert_eq!(deserialized.from, None);
         assert_eq!(deserialized.to, Some(Address::from_low_u64_be(5)));
@@ -353,7 +353,7 @@ mod tests {
     "block": 5
   }
 }"#;
-        let deserialized: TransactionRequest = serde_json::from_str(&serialized).unwrap();
+        let deserialized: TransactionRequest = serde_json::from_str(serialized).unwrap();
 
         assert_eq!(deserialized.from, Address::from_low_u64_be(5));
         assert_eq!(deserialized.to, None);