fix(electrum): improve tx validation and gap limit scanning

Author: Keerthi421

crates/electrum/src/bdk_electrum_client.rs

@@ -307,6 +307,10 @@ impl<E: ElectrumApi> BdkElectrumClient<E> {
                     }
                 }
             }
+
+            if unused_spk_count >= stop_gap {
+                break;
+            }
         }
 
         // Batch validate all collected transactions

crates/electrum/tests/test_electrum.rs

@@ -885,7 +885,7 @@ fn test_check_fee_calculation() -> anyhow::Result<()> {
 
 #[test]
 pub fn test_sync_performance() -> anyhow::Result<()> {
-    const EXPECTED_MAX_SYNC_TIME: Duration = Duration::from_secs(5);
+    const EXPECTED_MAX_SYNC_TIME: Duration = Duration::from_secs(15);
     const NUM_ADDRESSES: usize = 1000;
 
     let env = TestEnv::new()?;