refactor(mempool): rearrange insert_tx before refactoring code to sha…

…re functionality

crates/mempool/src/mempool.rs

@@ -134,14 +134,14 @@ impl Mempool {
         let MempoolInput { tx, account: Account { sender_address, state: AccountState { nonce } } } =
             input;
 
-        self.tx_pool.remove_up_to_nonce(sender_address, nonce);
+        self.tx_pool.insert(tx)?;
+
+        // Align the queue with the account's nonce.
         if self.tx_queue.get_nonce(sender_address).is_some_and(|queued_nonce| queued_nonce != nonce)
         {
             self.tx_queue.remove(sender_address);
         }
 
-        self.tx_pool.insert(tx)?;
-
         // Maybe close nonce gap.
         if self.tx_queue.get_nonce(sender_address).is_none() {
             if let Some(tx_reference) = self.tx_pool.get_by_address_and_nonce(sender_address, nonce)
@@ -150,6 +150,8 @@ impl Mempool {
             }
         }
 
+        self.tx_pool.remove_up_to_nonce(sender_address, nonce);
+
         Ok(())
     }