diff --git a/crates/primitives/src/transaction/eip1559.rs b/crates/primitives/src/transaction/eip1559.rs
index 89f78e7236..5c299806b8 100644
--- a/crates/primitives/src/transaction/eip1559.rs
+++ b/crates/primitives/src/transaction/eip1559.rs
@@ -110,17 +110,15 @@ impl TxEip1559 {
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header.
     pub(crate) fn fields_len(&self) -> usize {
-        let mut len = 0;
-        len += self.chain_id.length();
-        len += self.nonce.length();
-        len += self.max_priority_fee_per_gas.length();
-        len += self.max_fee_per_gas.length();
-        len += self.gas_limit.length();
-        len += self.to.length();
-        len += self.value.length();
-        len += self.input.0.length();
-        len += self.access_list.length();
-        len
+        self.chain_id.length() +
+            self.nonce.length() +
+            self.max_priority_fee_per_gas.length() +
+            self.max_fee_per_gas.length() +
+            self.gas_limit.length() +
+            self.to.length() +
+            self.value.length() +
+            self.input.0.length() +
+            self.access_list.length()
     }
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header.
diff --git a/crates/primitives/src/transaction/eip2930.rs b/crates/primitives/src/transaction/eip2930.rs
index 1e8c51f47b..036af743f2 100644
--- a/crates/primitives/src/transaction/eip2930.rs
+++ b/crates/primitives/src/transaction/eip2930.rs
@@ -91,16 +91,14 @@ impl TxEip2930 {
 
     /// Outputs the length of the transaction's fields, without a RLP header.
     pub(crate) fn fields_len(&self) -> usize {
-        let mut len = 0;
-        len += self.chain_id.length();
-        len += self.nonce.length();
-        len += self.gas_price.length();
-        len += self.gas_limit.length();
-        len += self.to.length();
-        len += self.value.length();
-        len += self.input.0.length();
-        len += self.access_list.length();
-        len
+        self.chain_id.length() +
+            self.nonce.length() +
+            self.gas_price.length() +
+            self.gas_limit.length() +
+            self.to.length() +
+            self.value.length() +
+            self.input.0.length() +
+            self.access_list.length()
     }
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header.
diff --git a/crates/primitives/src/transaction/eip4844.rs b/crates/primitives/src/transaction/eip4844.rs
index bafe7c0196..73cb22bf3e 100644
--- a/crates/primitives/src/transaction/eip4844.rs
+++ b/crates/primitives/src/transaction/eip4844.rs
@@ -207,19 +207,17 @@ impl TxEip4844 {
 
     /// Outputs the length of the transaction's fields, without a RLP header.
     pub(crate) fn fields_len(&self) -> usize {
-        let mut len = 0;
-        len += self.chain_id.length();
-        len += self.nonce.length();
-        len += self.gas_limit.length();
-        len += self.max_fee_per_gas.length();
-        len += self.max_priority_fee_per_gas.length();
-        len += self.to.length();
-        len += self.value.length();
-        len += self.access_list.length();
-        len += self.blob_versioned_hashes.length();
-        len += self.max_fee_per_blob_gas.length();
-        len += self.input.0.length();
-        len
+        self.chain_id.length() +
+            self.nonce.length() +
+            self.gas_limit.length() +
+            self.max_fee_per_gas.length() +
+            self.max_priority_fee_per_gas.length() +
+            self.to.length() +
+            self.value.length() +
+            self.access_list.length() +
+            self.blob_versioned_hashes.length() +
+            self.max_fee_per_blob_gas.length() +
+            self.input.0.length()
     }
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header.
diff --git a/crates/primitives/src/transaction/legacy.rs b/crates/primitives/src/transaction/legacy.rs
index 2a5b0b19a9..f717764dc2 100644
--- a/crates/primitives/src/transaction/legacy.rs
+++ b/crates/primitives/src/transaction/legacy.rs
@@ -58,14 +58,12 @@ impl TxLegacy {
     /// Outputs the length of the transaction's fields, without a RLP header or length of the
     /// eip155 fields.
     pub(crate) fn fields_len(&self) -> usize {
-        let mut len = 0;
-        len += self.nonce.length();
-        len += self.gas_price.length();
-        len += self.gas_limit.length();
-        len += self.to.length();
-        len += self.value.length();
-        len += self.input.0.length();
-        len
+        self.nonce.length() +
+            self.gas_price.length() +
+            self.gas_limit.length() +
+            self.to.length() +
+            self.value.length() +
+            self.input.0.length()
     }
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header or
diff --git a/crates/primitives/src/transaction/optimism.rs b/crates/primitives/src/transaction/optimism.rs
index 498e9b6873..535a7cd8f0 100644
--- a/crates/primitives/src/transaction/optimism.rs
+++ b/crates/primitives/src/transaction/optimism.rs
@@ -78,16 +78,14 @@ impl TxDeposit {
     /// Outputs the length of the transaction's fields, without a RLP header or length of the
     /// eip155 fields.
     pub(crate) fn fields_len(&self) -> usize {
-        let mut len = 0;
-        len += self.source_hash.length();
-        len += self.from.length();
-        len += self.to.length();
-        len += self.mint.map_or(1, |mint| mint.length());
-        len += self.value.length();
-        len += self.gas_limit.length();
-        len += self.is_system_transaction.length();
-        len += self.input.0.length();
-        len
+        self.source_hash.length() +
+            self.from.length() +
+            self.to.length() +
+            self.mint.map_or(1, |mint| mint.length()) +
+            self.value.length() +
+            self.gas_limit.length() +
+            self.is_system_transaction.length() +
+            self.input.0.length()
     }
 
     /// Encodes only the transaction's fields into the desired buffer, without a RLP header.