clippy: rm some type_complexity (#9276)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

crates/consensus/beacon/src/engine/mod.rs

@@ -88,6 +88,18 @@ const MAX_INVALID_HEADERS: u32 = 512u32;
 /// If the distance exceeds this threshold, the pipeline will be used for sync.
 pub const MIN_BLOCKS_FOR_PIPELINE_RUN: u64 = EPOCH_SLOTS;
 
+/// Represents a pending forkchoice update.
+///
+/// This type encapsulates the necessary components for a pending forkchoice update
+/// in the context of a beacon consensus engine.
+///
+/// It consists of:
+/// - The current fork choice state.
+/// - Optional payload attributes specific to the engine type.
+/// - Sender for the result of an oneshot channel, conveying the outcome of the fork choice update.
+type PendingForkchoiceUpdate<PayloadAttributes> =
+    (ForkchoiceState, Option<PayloadAttributes>, oneshot::Sender<RethResult<OnForkChoiceUpdated>>);
+
 /// The beacon consensus engine is the driver that switches between historical and live sync.
 ///
 /// The beacon consensus engine is itself driven by messages from the Consensus Layer, which are
@@ -189,12 +201,7 @@ where
     /// It is recorded if we cannot process the forkchoice update because
     /// a hook with database read-write access is active.
     /// This is a temporary solution to always process missed FCUs.
-    #[allow(clippy::type_complexity)]
-    pending_forkchoice_update: Option<(
-        ForkchoiceState,
-        Option<EngineT::PayloadAttributes>,
-        oneshot::Sender<RethResult<OnForkChoiceUpdated>>,
-    )>,
+    pending_forkchoice_update: Option<PendingForkchoiceUpdate<EngineT::PayloadAttributes>>,
     /// Tracks the header of invalid payloads that were rejected by the engine because they're
     /// invalid.
     invalid_headers: InvalidHeaderCache,

crates/etl/src/lib.rs

@@ -164,6 +164,14 @@ where
     }
 }
 
+/// Type alias for the items stored in the heap of [`EtlIter`].
+///
+/// Each item in the heap is a tuple containing:
+/// - A `Reverse` tuple of a key-value pair (`Vec<u8>, Vec<u8>`), used to maintain the heap in
+///   ascending order of keys.
+/// - An index (`usize`) representing the source file from which the key-value pair was read.
+type HeapItem = (Reverse<(Vec<u8>, Vec<u8>)>, usize);
+
 /// `EtlIter` is an iterator for traversing through sorted key-value pairs in a collection of ETL
 /// files. These files are created using the [`Collector`] and contain data where keys are encoded
 /// and values are compressed.
@@ -174,8 +182,7 @@ where
 #[derive(Debug)]
 pub struct EtlIter<'a> {
     /// Heap managing the next items to be iterated.
-    #[allow(clippy::type_complexity)]
-    heap: BinaryHeap<(Reverse<(Vec<u8>, Vec<u8>)>, usize)>,
+    heap: BinaryHeap<HeapItem>,
     /// Reference to the vector of ETL files being iterated over.
     files: &'a mut Vec<EtlFile>,
 }

crates/storage/db/benches/hash_keys.rs

@@ -130,7 +130,6 @@ where
 
 /// Generates two batches. The first is to be inserted into the database before running the
 /// benchmark. The second is to be benchmarked with.
-#[allow(clippy::type_complexity)]
 fn generate_batches<T>(size: usize) -> (Vec<TableRow<T>>, Vec<TableRow<T>>)
 where
     T: Table,

crates/storage/db/src/static_file/cursor.rs

@@ -10,6 +10,9 @@ use std::sync::Arc;
 #[derive(Debug, Deref, DerefMut)]
 pub struct StaticFileCursor<'a>(NippyJarCursor<'a, SegmentHeader>);
 
+/// Type alias for column results with optional values.
+type ColumnResult<T> = ProviderResult<Option<T>>;
+
 impl<'a> StaticFileCursor<'a> {
     /// Returns a new [`StaticFileCursor`].
     pub fn new(jar: &'a NippyJar<SegmentHeader>, reader: Arc<DataReader>) -> ProviderResult<Self> {
@@ -56,7 +59,7 @@ impl<'a> StaticFileCursor<'a> {
     pub fn get_one<M: ColumnSelectorOne>(
         &mut self,
         key_or_num: KeyOrNumber<'_>,
-    ) -> ProviderResult<Option<M::FIRST>> {
+    ) -> ColumnResult<M::FIRST> {
         let row = self.get(key_or_num, M::MASK)?;
 
         match row {
@@ -69,7 +72,7 @@ impl<'a> StaticFileCursor<'a> {
     pub fn get_two<M: ColumnSelectorTwo>(
         &mut self,
         key_or_num: KeyOrNumber<'_>,
-    ) -> ProviderResult<Option<(M::FIRST, M::SECOND)>> {
+    ) -> ColumnResult<(M::FIRST, M::SECOND)> {
         let row = self.get(key_or_num, M::MASK)?;
 
         match row {
@@ -79,11 +82,10 @@ impl<'a> StaticFileCursor<'a> {
     }
 
     /// Gets three column values from a row.
-    #[allow(clippy::type_complexity)]
     pub fn get_three<M: ColumnSelectorThree>(
         &mut self,
         key_or_num: KeyOrNumber<'_>,
-    ) -> ProviderResult<Option<(M::FIRST, M::SECOND, M::THIRD)>> {
+    ) -> ColumnResult<(M::FIRST, M::SECOND, M::THIRD)> {
         let row = self.get(key_or_num, M::MASK)?;
 
         match row {

examples/stateful-precompile/src/main.rs

@@ -30,6 +30,12 @@ use reth_tracing::{RethTracer, Tracer};
 use schnellru::{ByLength, LruMap};
 use std::{collections::HashMap, sync::Arc};
 
+/// Type alias for the LRU cache used within the [`PrecompileCache`].
+type PrecompileLRUCache = LruMap<(Bytes, u64), PrecompileResult>;
+
+/// Type alias for the thread-safe `Arc<RwLock<_>>` wrapper around [`PrecompileCache`].
+type CachedPrecompileResult = Arc<RwLock<PrecompileLRUCache>>;
+
 /// A cache for precompile inputs / outputs.
 ///
 /// This assumes that the precompile is a standard precompile, as in `StandardPrecompileFn`, meaning
@@ -40,8 +46,7 @@ use std::{collections::HashMap, sync::Arc};
 #[derive(Debug, Default)]
 pub struct PrecompileCache {
     /// Caches for each precompile input / output.
-    #[allow(clippy::type_complexity)]
-    cache: HashMap<(Address, SpecId), Arc<RwLock<LruMap<(Bytes, u64), PrecompileResult>>>>,
+    cache: HashMap<(Address, SpecId), CachedPrecompileResult>,
 }
 
 /// Custom EVM configuration