Fix clippy warning

Author: limemloh

concordium-node/src/bin/bootstrap_checker.rs

@@ -37,7 +37,7 @@ fn main() -> anyhow::Result<()> {
     let regenesis_arc: Arc<Regenesis> = Arc::new(Regenesis::from_blocks(regenesis_blocks));
 
     ensure!(
-        regenesis_arc.blocks.read().unwrap().len() > 0,
+        !regenesis_arc.blocks.read().unwrap().is_empty(),
         "Bootstrapper can't run without specifying genesis hashes."
     );
 

concordium-node/src/bin/bootstrapper.rs

@@ -40,7 +40,7 @@ async fn main() -> anyhow::Result<()> {
     let regenesis_arc: Arc<Regenesis> = Arc::new(Regenesis::from_blocks(regenesis_blocks));
 
     ensure!(
-        regenesis_arc.blocks.read().unwrap().len() > 0,
+        !regenesis_arc.blocks.read().unwrap().is_empty(),
         "Bootstrapper can't run without specifying genesis hashes."
     );
 

concordium-node/src/consensus_ffi/ffi.rs

@@ -2383,7 +2383,7 @@ impl ConsensusContainer {
         use crate::grpc2::Require;
         let bhi = crate::grpc2::types::block_hash_input_to_ffi(block_hash).require()?;
         let (block_id_type, block_hash) = bhi.to_ptr();
-        let token_id_len = token_id.value.as_bytes().len();
+        let token_id_len = token_id.value.len();
         if token_id_len > 255 {
             return Err(tonic::Status::invalid_argument(
                 "TokenId: length must be at most 255 bytes",

concordium-node/src/health.rs

@@ -51,7 +51,7 @@ enum ServiceError<'a> {
     ServiceNotFound { service: &'a str },
 }
 
-impl<'a> ServiceError<'a> {
+impl ServiceError<'_> {
     pub fn is_not_found(&self) -> bool {
         matches!(self, Self::ServiceNotFound { .. })
     }