feat: fix nonce off by one

Author: kamiyaa

rust/main/lander/src/adapter/chains/ethereum/adapter.rs

@@ -670,8 +670,8 @@ impl AdaptsChain for EthereumAdapter {
         );
 
         let mut txs = Vec::new();
-        let mut nonce = new_finalized_nonce;
-        while nonce < old_finalized_nonce {
+        let mut nonce = new_finalized_nonce.saturating_add(U256::one());
+        while nonce <= old_finalized_nonce {
             let tx_uuid = self.nonce_manager.state.get_tracked_tx_uuid(&nonce).await?;
             if let Some(tx) = self.nonce_manager.state.get_tracked_tx(&tx_uuid).await? {
                 txs.push(tx);

rust/main/lander/src/adapter/core.rs

@@ -115,12 +115,21 @@ pub trait AdaptsChain: Send + Sync {
         todo!()
     }
 
-    /// How often to poll for txs that need to be reprocessed
+    /// Returns the polling interval for checking if transactions need reprocessing.
+    ///
+    /// Returns `None` if the adapter does not support transaction reprocessing,
+    /// or `Some(Duration)` specifying how frequently to poll.
     fn reprocess_txs_poll_rate(&self) -> Option<Duration> {
         None
     }
 
-    /// Get a list of txs that need to be reprocessed
+    /// Get a list of payloads that need to be reprocessed.
+    ///
+    /// Returns an empty vector if no payloads need reprocessing or if the adapter
+    /// does not support reprocessing.
+    ///
+    /// Note: Implementations may update internal state (e.g., finalized nonce boundaries)
+    /// as part of determining which payloads need reprocessing.
     async fn get_reprocess_txs(&self) -> Result<Vec<Transaction>, LanderError> {
         Ok(Vec::new())
     }