fix(electrum): Only set last seen time for unconfirmed txs

Once a transaction is anchored in a confirmed block,
changing the last seen time again leads to needless writes
to the database.

Author: ValuedMammal

crates/electrum/src/electrum_ext.rs

@@ -46,8 +46,10 @@ impl RelevantTxids {
         let new_txs = client.batch_transaction_get(&missing)?;
         let mut graph = TxGraph::<ConfirmationHeightAnchor>::new(new_txs);
         for (txid, anchors) in self.0 {
-            if let Some(seen_at) = seen_at {
-                let _ = graph.insert_seen_at(txid, seen_at);
+            if anchors.is_empty() {
+                if let Some(seen_at) = seen_at {
+                    let _ = graph.insert_seen_at(txid, seen_at);
+                }
             }
             for anchor in anchors {
                 let _ = graph.insert_anchor(txid, anchor);