Electrum connection stability, swap fixes / UX improvements + Various fixes.

basicswap/basicswap.py

@@ -229,23 +229,35 @@ def checkAndNotifyBalanceChange(
             cc["cached_balance"] = current_balance
             cc["cached_total_balance"] = current_total_balance
             cc["cached_unconfirmed"] = current_unconfirmed
-            swap_client.log.debug(
+
-                f"{ci.ticker()} balance updated (trigger: {trigger_source})"
+            suppress = False
-            )
+            if cached_balance is None or cached_total_balance is None:
-            balance_event = {
+                suppress = True
-                "event": "coin_balance_updated",
+            elif hasattr(ci, "getBackend") and ci.useBackend():
-                "coin": ci.ticker(),
+                backend = ci.getBackend()
-                "height": new_height,
+                if backend and hasattr(backend, "recentlyReconnected"):
-                "trigger": trigger_source,
+                    if backend.recentlyReconnected(grace_seconds=30):
-            }
+                        suppress = True
-            swap_client.ws_server.send_message_to_all(json.dumps(balance_event))
+
+            if suppress:
+                swap_client.log.debug(
+                    f"{ci.ticker()} balance cache updated silently (trigger: {trigger_source})"
+                )
+            else:
+                swap_client.log.debug(
+                    f"{ci.ticker()} balance updated (trigger: {trigger_source})"
+                )
+                balance_event = {
+                    "event": "coin_balance_updated",
+                    "coin": ci.ticker(),
+                    "height": new_height,
+                    "trigger": trigger_source,
+                }
+                swap_client.ws_server.send_message_to_all(json.dumps(balance_event))
     except Exception as e:
         swap_client.log.debug(
             f"checkAndNotifyBalanceChange {ci.ticker()}: balance check failed: {e}"
         )
-        cc["cached_balance"] = None
-        cc["cached_total_balance"] = None
-        cc["cached_unconfirmed"] = None
 
 
 def threadPollXMRChainState(swap_client, coin_type):
@@ -458,6 +470,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         self._updating_wallets_info = {}
         self._last_updated_wallets_info = 0
         self._synced_addresses_from_full_node = set()
+        self._cached_electrum_legacy_funds = {}
 
         self.check_updates_seconds = self.get_int_setting(
             "check_updates_seconds", 24 * 60 * 60, 60 * 60, 7 * 24 * 60 * 60
@@ -581,6 +594,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         self.thread_pool = concurrent.futures.ThreadPoolExecutor(
             max_workers=4, thread_name_prefix="bsp"
         )
+        self._electrum_spend_check_futures = {}
 
         # Encode key to match network
         wif_prefix = chainparams[Coins.PART][self.chain]["key_prefix"]
@@ -736,24 +750,32 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         self.delay_event.set()
         self.chainstate_delay_event.set()
 
-        if self._network:
+        for coin_type, cc in self.coin_clients.items():
-            self._network.stopNetwork()
+            interface = cc.get("interface")
-            self._network = None
+            if (
-
+                interface
-        for coin_type, interface in self.coin_interfaces.items():
+                and hasattr(interface, "_backend")
-            if hasattr(interface, "_backend") and interface._backend is not None:
+                and interface._backend is not None
+            ):
                 try:
                     if hasattr(interface._backend, "_server"):
-                        interface._backend._server.disconnect()
+                        if hasattr(interface._backend._server, "shutdown"):
+                            interface._backend._server.shutdown()
+                        else:
+                            interface._backend._server.disconnect()
                     self.log.debug(f"Disconnected electrum backend for {coin_type}")
                 except Exception as e:
                     self.log.debug(f"Error disconnecting electrum backend: {e}")
 
+        if self._network:
+            self._network.stopNetwork()
+            self._network = None
+
         self.log.info("Stopping threads.")
         for t in self.threads:
             if hasattr(t, "stop") and callable(t.stop):
                 t.stop()
-            t.join()
+            t.join(timeout=15)
 
         if sys.version_info[1] >= 9:
             self.thread_pool.shutdown(cancel_futures=True)
@@ -1927,15 +1949,29 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                 cc["cached_total_balance"] = current_total
                 cc["cached_unconfirmed"] = current_total - current_balance
 
-                balance_event = {
+                suppress = False
-                    "event": "coin_balance_updated",
+                if hasattr(ci, "getBackend") and ci.useBackend():
-                    "coin": ci.ticker(),
+                    backend = ci.getBackend()
-                    "height": cc.get("chain_height", 0),
+                    if backend and hasattr(backend, "recentlyReconnected"):
-                    "trigger": "electrum_notification",
+                        if backend.recentlyReconnected(grace_seconds=30):
-                    "address": address[:20] + "..." if address else None,
+                            suppress = True
-                }
+
-                self.ws_server.send_message_to_all(json.dumps(balance_event))
+                if suppress:
-                self.log.debug(f"Electrum notification: {ci.ticker()} balance updated")
+                    self.log.debug(
+                        f"Electrum notification: {ci.ticker()} balance cache updated silently (recent reconnection)"
+                    )
+                else:
+                    balance_event = {
+                        "event": "coin_balance_updated",
+                        "coin": ci.ticker(),
+                        "height": cc.get("chain_height", 0),
+                        "trigger": "electrum_notification",
+                        "address": address[:20] + "..." if address else None,
+                    }
+                    self.ws_server.send_message_to_all(json.dumps(balance_event))
+                    self.log.debug(
+                        f"Electrum notification: {ci.ticker()} balance updated"
+                    )
 
         except Exception as e:
             self.log.debug(f"Error handling electrum notification: {e}")
@@ -2178,7 +2214,8 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                                 f"will sync keypool and trigger rescan in full node"
                             )
                             return {
-                                "empty": True,
+                                "empty": False,
+                                "reason": "has_balance",
                                 "has_balance": True,
                                 "balance_sats": balance_sats,
                                 "message": (
@@ -2495,9 +2532,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     else:
                         self.log.warning(f"Sweep skipped for {coin_name}: {reason}")
                 elif result.get("txid"):
-                    self.log.info(
+                    pass
-                        f"Sweep completed: {result.get('amount', 0) / 1e8:.8f} {coin_name} swept to RPC wallet"
-                    )
                 elif result.get("error"):
                     self.log.warning(
                         f"Sweep failed for {coin_name}: {result.get('error')}"
@@ -2745,6 +2780,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     {
                         "coin_type": int(coin_type),
                         "coin_name": coin_name,
+                        "ticker": chainparams[coin_type]["ticker"],
                         "amount": send_amount / 1e8,
                         "fee": fee / 1e8,
                         "txid": txid_hex,
@@ -2823,15 +2859,27 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
             except Exception as e:
                 return {"error": f"Failed to list UTXOs: {e}"}
 
-            hrp = ci.chainparams_network().get("hrp", "bc")
+            bip84_addresses = set()
+            wm = ci.getWalletManager()
+            if wm:
+                try:
+                    all_addrs = wm.getAllAddresses(coin_type, include_watch_only=False)
+                    bip84_addresses = set(all_addrs)
+                except Exception as e:
+                    self.log.debug(f"Error getting BIP84 addresses: {e}")
+
             legacy_utxos = []
             total_legacy_sats = 0
 
             for u in unspent:
-                if "address" not in u:
+                if "address" not in u or "txid" not in u:
+                    continue
+                if "vout" not in u and "n" not in u:
                     continue
                 addr = u["address"]
-                if not addr.startswith(hrp + "1"):
+                if addr not in bip84_addresses:
+                    if "vout" not in u and "n" in u:
+                        u["vout"] = u["n"]
                     legacy_utxos.append(u)
                     total_legacy_sats += ci.make_int(u.get("amount", 0))
 
@@ -2855,10 +2903,26 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     "reason": f"Legacy balance ({total_legacy_sats}) too low for fee ({estimated_fee_sats})",
                 }
 
-            try:
+            new_address = None
-                new_address = ci.rpc_wallet("getnewaddress", ["consolidate", "bech32"])
+            if wm:
-            except Exception as e:
+                try:
-                return {"error": f"Failed to get new address: {e}"}
+                    new_address = wm.getNewAddress(coin_type, internal=False)
+                    self.log.info(
+                        f"[Consolidate {coin_name}] Using BIP84 address: {new_address}"
+                    )
+                except Exception as e:
+                    self.log.warning(f"Failed to get BIP84 address: {e}")
+
+            if not new_address:
+                try:
+                    new_address = ci.rpc_wallet(
+                        "getnewaddress", ["consolidate", "bech32"]
+                    )
+                    self.log.warning(
+                        f"[Consolidate {coin_name}] Using Core address (not BIP84): {new_address}"
+                    )
+                except Exception as e:
+                    return {"error": f"Failed to get new address: {e}"}
 
             send_amount_sats = total_legacy_sats - estimated_fee_sats
             send_amount_btc = ci.format_amount(send_amount_sats)
@@ -2994,6 +3058,12 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
             return None
 
     def getElectrumLegacyFundsInfo(self, coin_type: Coins) -> dict:
+        cached = self._cached_electrum_legacy_funds.get(int(coin_type))
+        if cached is not None:
+            return cached
+        return self._computeElectrumLegacyFundsInfo(coin_type)
+
+    def _computeElectrumLegacyFundsInfo(self, coin_type: Coins) -> dict:
         try:
             cc = self.coin_clients.get(coin_type)
             if not cc or cc.get("connection_type") != "electrum":
@@ -3027,7 +3097,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                 }
             return {"has_legacy_funds": False}
         except Exception as e:
-            self.log.debug(f"getElectrumLegacyFundsInfo error: {e}")
+            self.log.debug(f"_computeElectrumLegacyFundsInfo error: {e}")
             return {"has_legacy_funds": False}
 
     def _tryGetFullNodeAddresses(self, coin_type: Coins) -> list:
@@ -4528,10 +4598,12 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         self.log.info_s(f"In txn: {txid}")
         return txid
 
-    def withdrawLTC(self, type_from, value, addr_to, subfee: bool) -> str:
+    def withdrawCoinExtended(
-        ci = self.ci(Coins.LTC)
+        self, coin_type, type_from, value, addr_to, subfee: bool
+    ) -> str:
+        ci = self.ci(coin_type)
         self.log.info(
-            "withdrawLTC{}".format(
+            "withdrawCoinExtended{}".format(
                 ""
                 if self.log.safe_logs
                 else " {} {} to {} {}".format(
@@ -7454,6 +7526,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     dest_address,
                     bid.amount_to,
                     bid.chain_b_height_start,
+                    find_index=True,
                     vout=bid.xmr_b_lock_tx.vout,
                 )
         else:
@@ -7498,7 +7571,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     bid_id=bid.bid_id,
                     tx_type=TxTypes.XMR_SWAP_B_LOCK,
                     txid=xmr_swap.b_lock_tx_id,
-                    vout=0,
+                    vout=found_tx.get("index", 0),
                 )
             if bid.xmr_b_lock_tx.txid != found_txid:
                 self.log.debug(
@@ -9328,6 +9401,95 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
 
         c["last_height_checked"] = chain_blocks
 
+    def _fetchSpendsElectrum(self, coin_type, watched_outputs, watched_scripts):
+        ci = self.ci(coin_type)
+        results = {"outputs": [], "scripts": [], "chain_blocks": 0}
+
+        try:
+            results["chain_blocks"] = ci.getChainHeight()
+        except Exception as e:
+            self.log.debug(f"_fetchSpendsElectrum getChainHeight error: {e}")
+            return results
+
+        for o in watched_outputs:
+            if self.delay_event.is_set():
+                return results
+            try:
+                spend_info = ci.checkWatchedOutput(o.txid_hex, o.vout)
+                if spend_info:
+                    raw_tx = ci.getBackend().getTransactionRaw(spend_info["txid"])
+                    if raw_tx:
+                        tx = ci.loadTx(bytes.fromhex(raw_tx))
+                        vin_list = []
+                        for idx, inp in enumerate(tx.vin):
+                            vin_entry = {
+                                "txid": f"{inp.prevout.hash:064x}",
+                                "vout": inp.prevout.n,
+                            }
+                            if tx.wit and idx < len(tx.wit.vtxinwit):
+                                wit = tx.wit.vtxinwit[idx]
+                                if wit.scriptWitness and wit.scriptWitness.stack:
+                                    vin_entry["txinwitness"] = [
+                                        item.hex() for item in wit.scriptWitness.stack
+                                    ]
+                            vin_list.append(vin_entry)
+                        tx_dict = {
+                            "txid": spend_info["txid"],
+                            "hex": raw_tx,
+                            "vin": vin_list,
+                            "vout": [
+                                {
+                                    "value": ci.format_amount(out.nValue),
+                                    "n": i,
+                                    "scriptPubKey": {"hex": out.scriptPubKey.hex()},
+                                }
+                                for i, out in enumerate(tx.vout)
+                            ],
+                        }
+                        results["outputs"].append((o, spend_info, tx_dict))
+            except Exception as e:
+                self.log.debug(f"_fetchSpendsElectrum checkWatchedOutput error: {e}")
+
+        for s in watched_scripts:
+            if self.delay_event.is_set():
+                return results
+            try:
+                found = ci.checkWatchedScript(s.script)
+                if found:
+                    results["scripts"].append((s, found))
+            except Exception as e:
+                self.log.debug(f"_fetchSpendsElectrum checkWatchedScript error: {e}")
+
+        return results
+
+    def _processFetchedSpends(self, coin_type, results):
+        c = self.coin_clients[coin_type]
+
+        for o, spend_info, tx_dict in results["outputs"]:
+            try:
+                self.log.debug(
+                    f"Found spend via Electrum {self.logIDT(o.txid_hex)} {o.vout} in {self.logIDT(spend_info['txid'])} {spend_info['vin']}"
+                )
+                self.processSpentOutput(
+                    coin_type, o, spend_info["txid"], spend_info["vin"], tx_dict
+                )
+            except Exception as e:
+                self.log.debug(f"_processFetchedSpends output error: {e}")
+
+        for s, found in results["scripts"]:
+            try:
+                txid_bytes = bytes.fromhex(found["txid"])
+                self.log.debug(
+                    f"Found script via Electrum for bid {self.log.id(s.bid_id)}: {self.logIDT(txid_bytes)} {found['vout']}."
+                )
+                self.processFoundScript(coin_type, s, txid_bytes, found["vout"])
+            except Exception as e:
+                self.log.debug(f"_processFetchedSpends script error: {e}")
+
+        chain_blocks = results.get("chain_blocks", 0)
+        if chain_blocks > 0:
+            c["last_height_checked"] = chain_blocks
+
     def expireMessageRoutes(self) -> None:
         if self._is_locked is True:
             self.log.debug("Not expiring message routes while system is locked")
@@ -9526,11 +9688,12 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         try:
             cursor = self.openDB()
 
-            query = "SELECT action_type, linked_id FROM actions WHERE active_ind = 1 AND trigger_at <= :now"
+            query = "SELECT action_id, action_type, linked_id FROM actions WHERE active_ind = 1 AND trigger_at <= :now"
             rows = cursor.execute(query, {"now": now}).fetchall()
+            retry_action_ids = []
 
             for row in rows:
-                action_type, linked_id = row
+                action_id, action_type, linked_id = row
                 accepting_bid: bool = False
                 try:
                     if action_type == ActionTypes.ACCEPT_BID:
@@ -9562,6 +9725,11 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                         self.acceptADSReverseBid(linked_id, cursor)
                     else:
                         self.log.warning(f"Unknown event type: {action_type}")
+                except TemporaryError as ex:
+                    self.log.warning(
+                        f"checkQueuedActions temporary error for {self.log.id(linked_id)}: {ex}"
+                    )
+                    retry_action_ids.append(action_id)
                 except Exception as ex:
                     err_msg = f"checkQueuedActions failed: {ex}"
                     self.logException(err_msg)
@@ -9594,10 +9762,23 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                             bid.setState(BidStates.BID_ERROR)
                             self.saveBidInSession(bid_id, bid, cursor)
 
-            query: str = "DELETE FROM actions WHERE trigger_at <= :now"
+            if retry_action_ids:
-            if self.debug:
+                placeholders = ",".join(
-                query = "UPDATE actions SET active_ind = 2 WHERE trigger_at <= :now"
+                    f":retry_{i}" for i in range(len(retry_action_ids))
-            cursor.execute(query, {"now": now})
+                )
+                params = {"now": now}
+                for i, aid in enumerate(retry_action_ids):
+                    params[f"retry_{i}"] = aid
+                if self.debug:
+                    query = f"UPDATE actions SET active_ind = 2 WHERE trigger_at <= :now AND action_id NOT IN ({placeholders})"
+                else:
+                    query = f"DELETE FROM actions WHERE trigger_at <= :now AND action_id NOT IN ({placeholders})"
+                cursor.execute(query, params)
+            else:
+                query: str = "DELETE FROM actions WHERE trigger_at <= :now"
+                if self.debug:
+                    query = "UPDATE actions SET active_ind = 2 WHERE trigger_at <= :now"
+                cursor.execute(query, {"now": now})
 
         except Exception as ex:
             self.handleSessionErrors(ex, cursor, "checkQueuedActions")
@@ -11349,13 +11530,18 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
             )
 
         try:
-            b_lock_tx_id = ci_to.publishBLockTx(
+            b_lock_vout = 0
+            result = ci_to.publishBLockTx(
                 xmr_swap.vkbv,
                 xmr_swap.pkbs,
                 bid.amount_to,
                 b_fee_rate,
                 unlock_time=unlock_time,
             )
+            if isinstance(result, tuple):
+                b_lock_tx_id, b_lock_vout = result
+            else:
+                b_lock_tx_id = result
             if bid.debug_ind == DebugTypes.B_LOCK_TX_MISSED_SEND:
                 self.log.debug(
                     f"Adaptor-sig bid {self.log.id(bid_id)}: Debug {bid.debug_ind} - Losing XMR lock tx {self.log.id(b_lock_tx_id)}."
@@ -11413,7 +11599,7 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
             bid_id=bid_id,
             tx_type=TxTypes.XMR_SWAP_B_LOCK,
             txid=b_lock_tx_id,
-            vout=0,
+            vout=b_lock_vout,
         )
         xmr_swap.b_lock_tx_id = b_lock_tx_id
         bid.xmr_b_lock_tx.setState(TxStates.TX_SENT)
@@ -12818,18 +13004,30 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
         if self._zmq_queue_enabled and self.zmqSubscriber:
             try:
                 if self._read_zmq_queue:
-                    topic, message, seq = self.zmqSubscriber.recv_multipart(
+                    for _i in range(100):
-                        flags=zmq.NOBLOCK
+                        topic, message, seq = self.zmqSubscriber.recv_multipart(
-                    )
+                            flags=zmq.NOBLOCK
-                    if topic == b"smsg":
+                        )
-                        self.processZmqSmsg(message)
+                        if topic == b"smsg":
-                    elif topic == b"hashwtx":
+                            self.processZmqSmsg(message)
-                        self.processZmqHashwtx(message)
+                        elif topic == b"hashwtx":
+                            self.processZmqHashwtx(message)
             except zmq.Again as e:  # noqa: F841
                 pass
             except Exception as e:
                 self.logException(f"smsg zmq {e}")
 
+        for k, future in list(self._electrum_spend_check_futures.items()):
+            if future.done():
+                try:
+                    results = future.result()
+                    self._processFetchedSpends(k, results)
+                except Exception as e:
+                    self.log.debug(
+                        f"Background electrum spend check error for {Coins(k).name}: {e}"
+                    )
+                del self._electrum_spend_check_futures[k]
+
         self.updateNetwork()
 
         try:
@@ -12891,7 +13089,21 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                     ):
                         continue
                     if len(c["watched_outputs"]) > 0 or len(c["watched_scripts"]):
-                        self.checkForSpends(k, c)
+                        if c.get("connection_type") == "electrum":
+                            if (
+                                k not in self._electrum_spend_check_futures
+                                or self._electrum_spend_check_futures[k].done()
+                            ):
+                                self._electrum_spend_check_futures[k] = (
+                                    self.thread_pool.submit(
+                                        self._fetchSpendsElectrum,
+                                        k,
+                                        list(c["watched_outputs"]),
+                                        list(c["watched_scripts"]),
+                                    )
+                                )
+                        else:
+                            self.checkForSpends(k, c)
                 self._last_checked_watched = now
 
             if now - self._last_checked_expired >= self.check_expired_seconds:
@@ -13250,39 +13462,35 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                 display_name = getCoinName(coin_id)
 
                 if old_connection_type == "rpc" and new_connection_type == "electrum":
-                    auto_transfer_now = data.get("auto_transfer_now", False)
-                    if auto_transfer_now:
-                        transfer_result = self._consolidateLegacyFundsToSegwit(coin_id)
-                        if transfer_result.get("success"):
-                            self.log.info(
-                                f"Consolidated {transfer_result.get('amount', 0):.8f} {display_name} "
-                                f"from legacy addresses. TXID: {transfer_result.get('txid')}"
-                            )
-                            if migration_message:
-                                migration_message += f" Transferred {transfer_result.get('amount', 0):.8f} {display_name} to native segwit."
-                            else:
-                                migration_message = f"Transferred {transfer_result.get('amount', 0):.8f} {display_name} to native segwit."
-                        elif transfer_result.get("skipped"):
-                            self.log.info(
-                                f"Legacy fund transfer skipped for {coin_name}: {transfer_result.get('reason')}"
-                            )
-                        elif transfer_result.get("error"):
-                            self.log.warning(
-                                f"Legacy fund transfer warning for {coin_name}: {transfer_result.get('error')}"
-                            )
-
                     migration_result = self._migrateWalletToLiteMode(coin_id)
                     if migration_result.get("success"):
                         count = migration_result.get("count", 0)
                         self.log.info(
                             f"Lite wallet ready for {coin_name} with {count} addresses"
                         )
-                        if migration_message:
+                        migration_message = (
-                            migration_message += (
+                            f"Lite wallet ready for {display_name} ({count} addresses)."
-                                f" Lite wallet ready ({count} addresses)."
+                        )
+
+                        auto_transfer_now = data.get("auto_transfer_now", False)
+                        if auto_transfer_now:
+                            transfer_result = self._consolidateLegacyFundsToSegwit(
+                                coin_id
                             )
-                        else:
+                            if transfer_result.get("success"):
-                            migration_message = f"Lite wallet ready for {display_name} ({count} addresses)."
+                                self.log.info(
+                                    f"Consolidated {transfer_result.get('amount', 0):.8f} {display_name} "
+                                    f"from legacy addresses. TXID: {transfer_result.get('txid')}"
+                                )
+                                migration_message += f" Transferred {transfer_result.get('amount', 0):.8f} {display_name} to native segwit."
+                            elif transfer_result.get("skipped"):
+                                self.log.info(
+                                    f"Legacy fund transfer skipped for {coin_name}: {transfer_result.get('reason')}"
+                                )
+                            elif transfer_result.get("error"):
+                                self.log.warning(
+                                    f"Legacy fund transfer warning for {coin_name}: {transfer_result.get('error')}"
+                                )
                     else:
                         error = migration_result.get("error", "unknown")
                         reason = migration_result.get("reason", "")
@@ -13333,14 +13541,23 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                                     f"Transfer failed for {coin_name}: {error}"
                                 )
                                 raise ValueError(f"Transfer failed: {error}")
-                        elif reason in ("has_balance", "active_swap"):
+                        elif reason == "active_swap":
                             error = empty_check.get(
-                                "message", "Wallet must be empty before switching modes"
+                                "message", "Cannot switch: active swap in progress"
                             )
                             self.log.error(
                                 f"Migration blocked for {coin_name}: {error}"
                             )
                             raise ValueError(error)
+                        elif reason == "has_balance":
+                            balance_msg = empty_check.get("message", "")
+                            self.log.warning(
+                                f"Switching {coin_name} to RPC without transfer: {balance_msg}"
+                            )
+                            migration_message = (
+                                f"{display_name} has funds on lite wallet addresses. "
+                                f"Keypool will be synced and rescan triggered."
+                            )
 
                     sync_result = self._syncWalletIndicesToRPC(coin_id)
                     if sync_result.get("success"):
@@ -13712,6 +13929,26 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                         rv["mweb_pending"] = walletinfo.get(
                             "mweb_unconfirmed", 0
                         ) + walletinfo.get("mweb_immature", 0)
+            elif coin == Coins.FIRO:
+                try:
+                    rv["spark_address"] = self.getCachedStealthAddressForCoin(
+                        Coins.FIRO
+                    )
+                except Exception as e:
+                    self.log.warning(
+                        f"getCachedStealthAddressForCoin for {ci.coin_name()} failed with: {e}."
+                    )
+                rv["spark_balance"] = (
+                    0
+                    if walletinfo["spark_balance"] == 0
+                    else ci.format_amount(walletinfo["spark_balance"])
+                )
+                spark_pending_int = (
+                    walletinfo["spark_unconfirmed"] + walletinfo["spark_immature"]
+                )
+                rv["spark_pending"] = (
+                    0 if spark_pending_int == 0 else ci.format_amount(spark_pending_int)
+                )
 
             return rv
         except Exception as e:
@@ -13719,9 +13956,9 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
 
     def addWalletInfoRecord(self, coin, info_type, wi) -> None:
         coin_id = int(coin)
+        now: int = self.getTime()
         cursor = self.openDB()
         try:
-            now: int = self.getTime()
             self.add(
                 Wallets(
                     coin_id=coin,
@@ -13975,6 +14212,8 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                         if row2[0].startswith("stealth"):
                             if coin_id == Coins.LTC:
                                 wallet_data["mweb_address"] = row2[1]
+                            elif coin_id == Coins.FIRO:
+                                wallet_data["spark_address"] = row2[1]
                             else:
                                 wallet_data["stealth_address"] = row2[1]
                         else:

basicswap/bin/run.py

@@ -36,22 +36,25 @@ def signal_handler(sig, frame):
     os.write(
         sys.stdout.fileno(), f"Signal {sig} detected, ending program.\n".encode("utf-8")
     )
-    if swap_client is not None and not swap_client.chainstate_delay_event.is_set():
+    try:
-        try:
+        if swap_client is not None and not swap_client.chainstate_delay_event.is_set():
-            from basicswap.ui.page_amm import stop_amm_process, get_amm_status
+            try:
+                from basicswap.ui.page_amm import stop_amm_process, get_amm_status
 
-            amm_status = get_amm_status()
+                amm_status = get_amm_status()
-            if amm_status == "running":
+                if amm_status == "running":
-                logger.info("Signal handler stopping AMM process...")
+                    logger.info("Signal handler stopping AMM process...")
-                success, msg = stop_amm_process(swap_client)
+                    success, msg = stop_amm_process(swap_client)
-                if success:
+                    if success:
-                    logger.info(f"AMM signal shutdown: {msg}")
+                        logger.info(f"AMM signal shutdown: {msg}")
-                else:
+                    else:
-                    logger.warning(f"AMM signal shutdown warning: {msg}")
+                        logger.warning(f"AMM signal shutdown warning: {msg}")
-        except Exception as e:
+            except Exception as e:
-            logger.error(f"Error stopping AMM in signal handler: {e}")
+                logger.error(f"Error stopping AMM in signal handler: {e}")
 
-        swap_client.stopRunning()
+            swap_client.stopRunning()
+    except NameError:
+        pass
 
 
 def checkPARTZmqConfigBeforeStart(part_settings, swap_settings):
@@ -618,7 +621,7 @@ def runClient(
                 signal.CTRL_C_EVENT if os.name == "nt" else signal.SIGINT
             )
         except Exception as e:
-            swap_client.log.info(f"Interrupting {d.name} {d.handle.pid}, error {e}")
+            swap_client.log.error(f"Interrupting {d.name} {d.handle.pid}: {e}")
     for d in daemons:
         try:
             d.handle.wait(timeout=120)
@@ -627,10 +630,12 @@ def runClient(
                     fp.close()
             closed_pids.append(d.handle.pid)
         except Exception as e:
-            swap_client.log.error(f"Error: {e}")
+            swap_client.log.error(
+                f"Waiting for {d.name} {d.handle.pid} to shutdown: {e}"
+            )
 
     fail_code: int = swap_client.fail_code
-    del swap_client
+    swap_client = None
 
     if os.path.exists(pids_path):
         with open(pids_path) as fd:

basicswap/http_server.py

@@ -6,8 +6,10 @@
 # file LICENSE or http://www.opensource.org/licenses/mit-license.php.
 
 import os
+import gzip
 import json
 import shlex
+import hashlib
 import secrets
 import traceback
 import threading
@@ -19,6 +21,7 @@ from jinja2 import Environment, PackageLoader
 from socket import error as SocketError
 from urllib import parse
 from datetime import datetime, timedelta, timezone
+from email.utils import formatdate, parsedate_to_datetime
 from http.cookies import SimpleCookie
 
 from . import __version__
@@ -802,7 +805,6 @@ class HttpHandler(BaseHTTPRequestHandler):
         if page == "static":
             try:
                 static_path = os.path.join(os.path.dirname(__file__), "static")
-                content = None
                 mime_type = ""
                 filepath = ""
                 if len(url_split) > 3 and url_split[2] == "sequence_diagrams":
@@ -835,9 +837,73 @@ class HttpHandler(BaseHTTPRequestHandler):
                 if mime_type == "" or not filepath:
                     raise ValueError("Unknown file type or path")
 
+                file_stat = os.stat(filepath)
+                mtime = file_stat.st_mtime
+                file_size = file_stat.st_size
+
+                etag_hash = hashlib.md5(
+                    f"{file_size}-{mtime}".encode()
+                ).hexdigest()
+                etag = f'"{etag_hash}"'
+                last_modified = formatdate(mtime, usegmt=True)
+
+                if_none_match = self.headers.get("If-None-Match")
+                if if_none_match:
+                    if if_none_match.strip() == "*" or etag in [
+                        t.strip() for t in if_none_match.split(",")
+                    ]:
+                        self.send_response(304)
+                        self.send_header("ETag", etag)
+                        self.send_header("Cache-Control", "public")
+                        self.end_headers()
+                        return b""
+
+                if_modified_since = self.headers.get("If-Modified-Since")
+                if if_modified_since and not if_none_match:
+                    try:
+                        ims_time = parsedate_to_datetime(if_modified_since)
+                        file_time = datetime.fromtimestamp(int(mtime), tz=timezone.utc)
+                        if file_time <= ims_time:
+                            self.send_response(304)
+                            self.send_header("Last-Modified", last_modified)
+                            self.send_header("Cache-Control", "public")
+                            self.end_headers()
+                            return b""
+                    except (TypeError, ValueError):
+                        pass
+
+                is_lib = len(url_split) > 4 and url_split[3] == "libs"
+                if is_lib:
+                    cache_control = "public, max-age=31536000, immutable"
+                elif url_split[2] in ("css", "js"):
+                    cache_control = "public, max-age=3600, must-revalidate"
+                elif url_split[2] in ("images", "sequence_diagrams"):
+                    cache_control = "public, max-age=86400"
+                else:
+                    cache_control = "public, max-age=3600"
+
                 with open(filepath, "rb") as fp:
                     content = fp.read()
-                self.putHeaders(status_code, mime_type)
+
+                extra_headers = [
+                    ("Cache-Control", cache_control),
+                    ("Last-Modified", last_modified),
+                    ("ETag", etag),
+                ]
+
+                is_compressible = mime_type in (
+                    "text/css; charset=utf-8",
+                    "application/javascript",
+                    "image/svg+xml",
+                )
+                accept_encoding = self.headers.get("Accept-Encoding", "")
+                if is_compressible and "gzip" in accept_encoding:
+                    content = gzip.compress(content)
+                    extra_headers.append(("Content-Encoding", "gzip"))
+                    extra_headers.append(("Vary", "Accept-Encoding"))
+
+                extra_headers.append(("Content-Length", str(len(content))))
+                self.putHeaders(status_code, mime_type, extra_headers=extra_headers)
                 return content
 
             except FileNotFoundError:

basicswap/interface/btc.py

@@ -15,6 +15,7 @@ import os
 import shutil
 import sqlite3
 import threading
+import time
 import traceback
 
 from io import BytesIO
@@ -185,6 +186,7 @@ def extractScriptLockRefundScriptValues(script_bytes: bytes):
 
 class BTCInterface(Secp256k1Interface):
     _scantxoutset_lock = threading.Lock()
+    _MAX_SCANTXOUTSET_RETRIES = 3
 
     @staticmethod
     def coin_type():
@@ -233,6 +235,10 @@ class BTCInterface(Secp256k1Interface):
     def xmr_swap_b_lock_spend_tx_vsize() -> int:
         return 110
 
+    @staticmethod
+    def getdustlimit() -> int:
+        return 5460
+
     @staticmethod
     def txoType():
         return CTxOut
@@ -759,6 +765,19 @@ class BTCInterface(Secp256k1Interface):
                     wm.syncBalances(
                         self.coin_type(), self._backend, funded_only=not do_full_scan
                     )
+
+                try:
+                    self._backend.estimateFee(self._conf_target)
+                except Exception:
+                    pass
+
+                try:
+                    coin_type = self.coin_type()
+                    if coin_type in (Coins.BTC, Coins.LTC):
+                        result = self._sc._computeElectrumLegacyFundsInfo(coin_type)
+                        self._sc._cached_electrum_legacy_funds[int(coin_type)] = result
+                except Exception:
+                    pass
             finally:
                 if hasattr(self._backend, "setBackgroundMode"):
                     self._backend.setBackgroundMode(False)
@@ -1890,8 +1909,9 @@ class BTCInterface(Secp256k1Interface):
         rough_vsize = 10 + (len(funded_tx.vout) + 1) * 34 + len(selected_utxos) * 68
         rough_fee = max(round(feerate_satkb * rough_vsize / 1000), min_relay_fee)
         rough_change = total_input - total_output - rough_fee
+        dust_limit = self.getdustlimit()
 
-        if rough_change > 1000:
+        if rough_change > dust_limit:
             change_addr = wm.getNewInternalAddress(self.coin_type())
             if not change_addr:
                 change_addr = wm.getExistingInternalAddress(self.coin_type())
@@ -1907,7 +1927,7 @@ class BTCInterface(Secp256k1Interface):
             final_fee = max(round(feerate_satkb * final_vsize / 1000), min_relay_fee)
             change = total_input - total_output - final_fee
 
-            if change > 1000:
+            if change > dust_limit:
                 funded_tx.vout[-1].nValue = change
             else:
                 funded_tx.vout.pop()
@@ -2418,10 +2438,37 @@ class BTCInterface(Secp256k1Interface):
     def getPkDest(self, K: bytes) -> bytearray:
         return self.getScriptForPubkeyHash(self.getPubkeyHash(K))
 
+    def _rpc_scantxoutset(self, descriptors: list):
+        with BTCInterface._scantxoutset_lock:
+            for attempt in range(self._MAX_SCANTXOUTSET_RETRIES):
+                try:
+                    return self.rpc("scantxoutset", ["start", descriptors])
+                except ValueError as e:
+                    if "Scan already in progress" in str(e):
+                        self._log.warning(
+                            "scantxoutset: scan already in progress (attempt %d/%d), aborting",
+                            attempt + 1,
+                            self._MAX_SCANTXOUTSET_RETRIES,
+                        )
+                        try:
+                            self.rpc("scantxoutset", ["abort"])
+                        except Exception as abort_err:
+                            self._log.debug(
+                                "scantxoutset abort returned: %s", abort_err
+                            )
+                        time.sleep(0.5)
+                    else:
+                        raise
+            raise ValueError(
+                "scantxoutset failed after {} retries – scan could not be started".format(
+                    self._MAX_SCANTXOUTSET_RETRIES
+                )
+            )
+
     def scanTxOutset(self, dest):
         if self._connection_type == "electrum":
             return self._scanTxOutsetElectrum(dest)
-        return self.rpc("scantxoutset", ["start", ["raw({})".format(dest.hex())]])
+        return self._rpc_scantxoutset(["raw({})".format(dest.hex())])
 
     def _scanTxOutsetElectrum(self, dest):
         backend = self.getBackend()
@@ -2572,15 +2619,19 @@ class BTCInterface(Secp256k1Interface):
     def encodeSharedAddress(self, Kbv, Kbs):
         return self.pubkey_to_segwit_address(Kbs)
 
-    def publishBLockTx(
+    def publishBLockTx(self, kbv, Kbs, output_amount, feerate, unlock_time: int = 0):
-        self, kbv, Kbs, output_amount, feerate, unlock_time: int = 0
-    ) -> bytes:
         b_lock_tx = self.createBLockTx(Kbs, output_amount)
 
         b_lock_tx = self.fundTx(b_lock_tx, feerate)
+
+        script_pk = self.getPkDest(Kbs)
+        funded_tx = self.loadTx(b_lock_tx)
+        lock_vout = findOutput(funded_tx, script_pk)
+
         b_lock_tx = self.signTxWithWallet(b_lock_tx)
 
-        return bytes.fromhex(self.publishTx(b_lock_tx))
+        txid = bytes.fromhex(self.publishTx(b_lock_tx))
+        return txid, lock_vout
 
     def getTxVSize(self, tx, add_bytes: int = 0, add_witness_bytes: int = 0) -> int:
         wsf = self.witnessScaleFactor()
@@ -2604,7 +2655,9 @@ class BTCInterface(Secp256k1Interface):
             if self.using_segwit()
             else self.pubkey_to_address(Kbs)
         )
-        return self.getLockTxHeight(None, dest_address, cb_swap_value, restore_height)
+        return self.getLockTxHeight(
+            None, dest_address, cb_swap_value, restore_height, find_index=True
+        )
 
         """
         raw_dest = self.getPkDest(Kbs)
@@ -2646,44 +2699,66 @@ class BTCInterface(Secp256k1Interface):
                 self._log.id(chain_b_lock_txid), lock_tx_vout
             )
         )
-        locked_n = lock_tx_vout
-
         Kbs = self.getPubkey(kbs)
         script_pk = self.getPkDest(Kbs)
 
-        if locked_n is None:
+        locked_n = None
-            if self.useBackend():
+        actual_value = None
-                backend = self.getBackend()
+        if self.useBackend():
-                tx_hex = backend.getTransactionRaw(chain_b_lock_txid.hex())
+            backend = self.getBackend()
-                if tx_hex:
+            tx_hex = backend.getTransactionRaw(chain_b_lock_txid.hex())
-                    lock_tx = self.loadTx(bytes.fromhex(tx_hex))
+            if tx_hex:
-                    locked_n = findOutput(lock_tx, script_pk)
+                lock_tx = self.loadTx(bytes.fromhex(tx_hex))
-                    if locked_n is None:
-                        self._log.error(
-                            f"spendBLockTx: Output not found in tx {chain_b_lock_txid.hex()}, "
-                            f"script_pk={script_pk.hex()}, num_outputs={len(lock_tx.vout)}"
-                        )
-                        for i, out in enumerate(lock_tx.vout):
-                            self._log.debug(
-                                f"  vout[{i}]: value={out.nValue}, scriptPubKey={out.scriptPubKey.hex()}"
-                            )
-                else:
-                    self._log.warning(
-                        f"spendBLockTx: Failed to fetch tx {chain_b_lock_txid.hex()} from electrum, "
-                        f"defaulting to vout=0 (standard for B lock transactions)"
-                    )
-                    locked_n = 0
-            else:
-                wtx = self.rpc_wallet_watch(
-                    "gettransaction",
-                    [
-                        chain_b_lock_txid.hex(),
-                    ],
-                )
-                lock_tx = self.loadTx(bytes.fromhex(wtx["hex"]))
                 locked_n = findOutput(lock_tx, script_pk)
+                if locked_n is not None:
+                    actual_value = lock_tx.vout[locked_n].nValue
+                else:
+                    self._log.error(
+                        f"spendBLockTx: Output not found in tx {chain_b_lock_txid.hex()}, "
+                        f"script_pk={script_pk.hex()}, num_outputs={len(lock_tx.vout)}"
+                    )
+                    for i, out in enumerate(lock_tx.vout):
+                        self._log.debug(
+                            f"  vout[{i}]: value={out.nValue}, scriptPubKey={out.scriptPubKey.hex()}"
+                        )
+            else:
+                self._log.warning(
+                    f"spendBLockTx: Failed to fetch tx {chain_b_lock_txid.hex()} from backend"
+                )
+                locked_n = lock_tx_vout
+        else:
+            wtx = self.rpc_wallet_watch(
+                "gettransaction",
+                [
+                    chain_b_lock_txid.hex(),
+                ],
+            )
+            lock_tx = self.loadTx(bytes.fromhex(wtx["hex"]))
+            locked_n = findOutput(lock_tx, script_pk)
+            if locked_n is not None:
+                actual_value = lock_tx.vout[locked_n].nValue
+
+        if (
+            locked_n is not None
+            and lock_tx_vout is not None
+            and locked_n != lock_tx_vout
+        ):
+            self._log.warning(
+                f"spendBLockTx: Stored vout {lock_tx_vout} differs from actual vout {locked_n} "
+                f"for tx {chain_b_lock_txid.hex()}"
+            )
+
         ensure(locked_n is not None, "Output not found in tx")
 
+        spend_value = cb_swap_value
+        if spend_actual_balance and actual_value is not None:
+            if actual_value != cb_swap_value:
+                self._log.warning(
+                    f"spendBLockTx: Spending actual balance {actual_value}, "
+                    f"not expected swap value {cb_swap_value}."
+                )
+            spend_value = actual_value
+
         pkh_to = self.decodeAddress(address_to)
 
         tx = CTransaction()
@@ -2699,16 +2774,14 @@ class BTCInterface(Secp256k1Interface):
                 scriptSig=self.getScriptScriptSig(script_lock),
             )
         )
-        tx.vout.append(
+        tx.vout.append(self.txoType()(spend_value, self.getScriptForPubkeyHash(pkh_to)))
-            self.txoType()(cb_swap_value, self.getScriptForPubkeyHash(pkh_to))
-        )
 
         pay_fee = self.getBLockSpendTxFee(tx, b_fee)
-        tx.vout[0].nValue = cb_swap_value - pay_fee
+        tx.vout[0].nValue = spend_value - pay_fee
 
         b_lock_spend_tx = tx.serialize()
         b_lock_spend_tx = self.signTxWithKey(
-            b_lock_spend_tx, kbs, prev_amount=cb_swap_value
+            b_lock_spend_tx, kbs, prev_amount=spend_value
         )
 
         return bytes.fromhex(self.publishTx(b_lock_spend_tx))
@@ -3036,9 +3109,7 @@ class BTCInterface(Secp256k1Interface):
             return self._getOutputElectrum(txid, dest_script, expect_value, xmr_swap)
 
         # TODO: Use getrawtransaction if txindex is active
-        utxos = self.rpc(
+        utxos = self._rpc_scantxoutset(["raw({})".format(dest_script.hex())])
-            "scantxoutset", ["start", ["raw({})".format(dest_script.hex())]]
-        )
         if "height" in utxos:  # chain_height not returned by v18 codebase
             chain_height = utxos["height"]
         else:
@@ -3492,13 +3563,12 @@ class BTCInterface(Secp256k1Interface):
 
         sum_unspent = 0
 
-        with BTCInterface._scantxoutset_lock:
+        self._log.debug("scantxoutset start")
-            self._log.debug("scantxoutset start")
+        ro = self._rpc_scantxoutset(["addr({})".format(address)])
-            ro = self.rpc("scantxoutset", ["start", ["addr({})".format(address)]])
+        self._log.debug("scantxoutset end")
-            self._log.debug("scantxoutset end")
 
-            for o in ro["unspents"]:
+        for o in ro["unspents"]:
-                sum_unspent += self.make_int(o["amount"])
+            sum_unspent += self.make_int(o["amount"])
         return sum_unspent
 
     def _getUTXOBalanceElectrum(self, address: str):
@@ -3881,7 +3951,7 @@ class BTCInterface(Secp256k1Interface):
 
             self.rpc("loadwallet", [self._rpc_wallet])
 
-        self.rpc_wallet("encryptwallet", [password])
+        self.rpc_wallet("encryptwallet", [password], timeout=120)
 
         if check_seed is False or seed_id_before == "Not found" or walletpath is None:
             return
@@ -4005,7 +4075,9 @@ class BTCInterface(Secp256k1Interface):
             if self.isWalletEncrypted():
                 raise ValueError("Old password must be set")
             return self.encryptWallet(new_password, check_seed=check_seed_if_encrypt)
-        self.rpc_wallet("walletpassphrasechange", [old_password, new_password])
+        self.rpc_wallet(
+            "walletpassphrasechange", [old_password, new_password], timeout=120
+        )
 
     def unlockWallet(self, password: str, check_seed: bool = True) -> None:
         if password == "":
@@ -4038,12 +4110,9 @@ class BTCInterface(Secp256k1Interface):
 
             try:
                 seed_id = self.getWalletSeedID()
-                self._log.debug(
-                    f"{self.ticker()} unlockWallet getWalletSeedID returned: {seed_id}"
-                )
                 needs_seed_init = seed_id == "Not found"
             except Exception as e:
-                self._log.debug(f"getWalletSeedID failed: {e}, will initialize seed")
+                self._log.debug(f"getWalletSeedID failed: {e}")
                 needs_seed_init = True
             if needs_seed_init:
                 self._log.info(f"Initializing HD seed for {self.coin_name()}.")
@@ -4051,11 +4120,9 @@ class BTCInterface(Secp256k1Interface):
                 if password:
                     self._log.info(f"Encrypting {self.coin_name()} wallet.")
                     try:
-                        self.rpc_wallet("encryptwallet", [password])
+                        self.rpc_wallet("encryptwallet", [password], timeout=120)
                     except Exception as e:
                         self._log.debug(f"encryptwallet returned: {e}")
-                    import time
-
                     for i in range(10):
                         time.sleep(1)
                         try:
@@ -4072,7 +4139,7 @@ class BTCInterface(Secp256k1Interface):
                 check_seed = False
 
         if self.isWalletEncrypted():
-            self.rpc_wallet("walletpassphrase", [password, 100000000])
+            self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
         if check_seed:
             self._sc.checkWalletSeed(self.coin_type())
 
@@ -4080,7 +4147,15 @@ class BTCInterface(Secp256k1Interface):
         self._log.info(f"lockWallet - {self.ticker()}")
         if self.useBackend():
             return
-        self.rpc_wallet("walletlock")
+        try:
+            self.rpc_wallet("walletlock")
+        except Exception as e:
+            if "unencrypted wallet" in str(e).lower():
+                self._log.debug(
+                    f"lockWallet skipped - {self.ticker()} wallet is not encrypted"
+                )
+                return
+            raise
 
     def get_p2sh_script_pubkey(self, script: bytearray) -> bytearray:
         script_hash = hash160(script)

basicswap/interface/dash.py

@@ -132,7 +132,7 @@ class DASHInterface(BTCInterface):
             self.unlockWallet(old_password, check_seed=False)
         seed_id_before: str = self.getWalletSeedID()
 
-        self.rpc_wallet("encryptwallet", [new_password])
+        self.rpc_wallet("encryptwallet", [new_password], timeout=120)
 
         if check_seed is False or seed_id_before == "Not found":
             return
@@ -156,4 +156,6 @@ class DASHInterface(BTCInterface):
             if self.isWalletEncrypted():
                 raise ValueError("Old password must be set")
             return self.encryptWallet(old_password, new_password, check_seed_if_encrypt)
-        self.rpc_wallet("walletpassphrasechange", [old_password, new_password])
+        self.rpc_wallet(
+            "walletpassphrasechange", [old_password, new_password], timeout=120
+        )

basicswap/interface/dcr/dcr.py

@@ -188,6 +188,10 @@ class DCRInterface(Secp256k1Interface):
     def coin_type():
         return Coins.DCR
 
+    @staticmethod
+    def useBackend() -> bool:
+        return False
+
     @staticmethod
     def exp() -> int:
         return 8
@@ -364,7 +368,9 @@ class DCRInterface(Secp256k1Interface):
             # Read initial pwd from settings
             settings = self._sc.getChainClientSettings(self.coin_type())
             old_password = settings["wallet_pwd"]
-        self.rpc_wallet("walletpassphrasechange", [old_password, new_password])
+        self.rpc_wallet(
+            "walletpassphrasechange", [old_password, new_password], timeout=120
+        )
 
         # Lock wallet to match other coins
         self.rpc_wallet("walletlock")
@@ -378,7 +384,7 @@ class DCRInterface(Secp256k1Interface):
         self._log.info("unlockWallet - {}".format(self.ticker()))
 
         # Max timeout value, ~3 years
-        self.rpc_wallet("walletpassphrase", [password, 100000000])
+        self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
         if check_seed:
             self._sc.checkWalletSeed(self.coin_type())
 
@@ -1064,6 +1070,9 @@ class DCRInterface(Secp256k1Interface):
     def describeTx(self, tx_hex: str):
         return self.rpc("decoderawtransaction", [tx_hex])
 
+    def decodeRawTransaction(self, tx_hex: str):
+        return self.rpc("decoderawtransaction", [tx_hex])
+
     def fundTx(self, tx: bytes, feerate) -> bytes:
         feerate_str = float(self.format_amount(feerate))
         # TODO: unlock unspents if bid cancelled
@@ -1732,15 +1741,19 @@ class DCRInterface(Secp256k1Interface):
         tx.vout.append(self.txoType()(output_amount, script_pk))
         return tx.serialize()
 
-    def publishBLockTx(
+    def publishBLockTx(self, kbv, Kbs, output_amount, feerate, unlock_time: int = 0):
-        self, kbv, Kbs, output_amount, feerate, unlock_time: int = 0
-    ) -> bytes:
         b_lock_tx = self.createBLockTx(Kbs, output_amount)
 
         b_lock_tx = self.fundTx(b_lock_tx, feerate)
+
+        script_pk = self.getPkDest(Kbs)
+        funded_tx = self.loadTx(b_lock_tx)
+        lock_vout = findOutput(funded_tx, script_pk)
+
         b_lock_tx = self.signTxWithWallet(b_lock_tx)
 
-        return bytes.fromhex(self.publishTx(b_lock_tx))
+        txid = bytes.fromhex(self.publishTx(b_lock_tx))
+        return txid, lock_vout
 
     def getBLockSpendTxFee(self, tx, fee_rate: int) -> int:
         witness_bytes = 115
@@ -1764,26 +1777,53 @@ class DCRInterface(Secp256k1Interface):
         lock_tx_vout=None,
     ) -> bytes:
         self._log.info("spendBLockTx %s:\n", chain_b_lock_txid.hex())
-        locked_n = lock_tx_vout
 
         Kbs = self.getPubkey(kbs)
         script_pk = self.getPkDest(Kbs)
 
-        if locked_n is None:
+        locked_n = None
-            self._log.debug(
+        actual_value = None
-                f"Unknown lock vout, searching tx: {chain_b_lock_txid.hex()}"
+        wtx = self.rpc_wallet(
+            "gettransaction",
+            [
+                chain_b_lock_txid.hex(),
+            ],
+        )
+        lock_tx = self.loadTx(bytes.fromhex(wtx["hex"]))
+        locked_n = findOutput(lock_tx, script_pk)
+        if locked_n is not None:
+            actual_value = lock_tx.vout[locked_n].value
+        else:
+            self._log.error(
+                f"spendBLockTx: Output not found in tx {chain_b_lock_txid.hex()}, "
+                f"script_pk={script_pk.hex()}, num_outputs={len(lock_tx.vout)}"
             )
-            # When refunding a lock tx, it should be in the wallet as a sent tx
+            for i, out in enumerate(lock_tx.vout):
-            wtx = self.rpc_wallet(
+                self._log.debug(
-                "gettransaction",
+                    f"  vout[{i}]: value={out.value}, scriptPubKey={out.scriptPubKey.hex()}"
-                [
+                )
-                    chain_b_lock_txid.hex(),
+
-                ],
+        if (
+            locked_n is not None
+            and lock_tx_vout is not None
+            and locked_n != lock_tx_vout
+        ):
+            self._log.warning(
+                f"spendBLockTx: Stored vout {lock_tx_vout} differs from actual vout {locked_n} "
+                f"for tx {chain_b_lock_txid.hex()}"
             )
-            lock_tx = self.loadTx(bytes.fromhex(wtx["hex"]))
-            locked_n = findOutput(lock_tx, script_pk)
 
         ensure(locked_n is not None, "Output not found in tx")
+
+        spend_value = cb_swap_value
+        if spend_actual_balance and actual_value is not None:
+            if actual_value != cb_swap_value:
+                self._log.warning(
+                    f"spendBLockTx: Spending actual balance {actual_value}, "
+                    f"not expected swap value {cb_swap_value}."
+                )
+            spend_value = actual_value
+
         pkh_to = self.decodeAddress(address_to)
 
         tx = CTransaction()
@@ -1792,10 +1832,10 @@ class DCRInterface(Secp256k1Interface):
         chain_b_lock_txid_int = b2i(chain_b_lock_txid)
 
         tx.vin.append(CTxIn(COutPoint(chain_b_lock_txid_int, locked_n, 0), sequence=0))
-        tx.vout.append(self.txoType()(cb_swap_value, self.getPubkeyHashDest(pkh_to)))
+        tx.vout.append(self.txoType()(spend_value, self.getPubkeyHashDest(pkh_to)))
 
         pay_fee = self.getBLockSpendTxFee(tx, b_fee)
-        tx.vout[0].value = cb_swap_value - pay_fee
+        tx.vout[0].value = spend_value - pay_fee
 
         b_lock_spend_tx = tx.serialize()
         b_lock_spend_tx = self.signTxWithKey(b_lock_spend_tx, kbs)

basicswap/interface/electrumx.py

@@ -119,7 +119,8 @@ class ElectrumConnection:
         self._socket = None
         self._connected = False
         _close_socket_safe(sock)
-        for q in self._response_queues.values():
+        queues = list(self._response_queues.values())
+        for q in queues:
             try:
                 q.put({"error": "Connection closed"})
             except Exception:
@@ -305,17 +306,26 @@ class ElectrumConnection:
         results = {}
         deadline = time.time() + timeout
         for req_id in expected_ids:
-            remaining = deadline - time.time()
+            response = None
-            if remaining <= 0:
+            while response is None:
-                raise TemporaryError("Batch request timed out")
+                remaining = deadline - time.time()
+                if remaining <= 0:
+                    raise TemporaryError("Batch request timed out")
+                if not self._connected:
+                    raise TemporaryError("Connection closed during batch request")
+                poll_time = min(remaining, 2.0)
+                try:
+                    response = self._response_queues[req_id].get(timeout=poll_time)
+                except queue.Empty:
+                    continue
             try:
-                response = self._response_queues[req_id].get(timeout=remaining)
                 if "error" in response and response["error"]:
+                    error_msg = str(response["error"])
+                    if "Connection closed" in error_msg:
+                        raise TemporaryError("Connection closed during batch request")
                     results[req_id] = {"error": response["error"]}
                 else:
                     results[req_id] = {"result": response.get("result")}
-            except queue.Empty:
-                raise TemporaryError("Batch request timed out")
             finally:
                 self._response_queues.pop(req_id, None)
         return results
@@ -329,13 +339,13 @@ class ElectrumConnection:
                     self._request_id += 1
                     request_id = self._request_id
                     self._response_queues[request_id] = queue.Queue()
-                request = {
+                    request = {
-                    "jsonrpc": "2.0",
+                        "jsonrpc": "2.0",
-                    "id": request_id,
+                        "id": request_id,
-                    "method": method,
+                        "method": method,
-                    "params": params if params else [],
+                        "params": params if params else [],
-                }
+                    }
-                self._socket.sendall((json.dumps(request) + "\n").encode())
+                    self._socket.sendall((json.dumps(request) + "\n").encode())
                 result = self._receive_response_async(request_id, timeout=timeout)
                 return result
             else:
@@ -470,6 +480,7 @@ class ElectrumServer:
         self._connection = None
         self._current_server_idx = 0
         self._lock = threading.Lock()
+        self._stopping = False
 
         self._server_version = None
         self._current_server_host = None
@@ -492,17 +503,24 @@ class ElectrumServer:
         self._server_blacklist = {}
         self._rate_limit_backoff = 300
 
+        self._consecutive_timeouts = 0
+        self._max_consecutive_timeouts = 5
+        self._last_timeout_time = 0
+        self._timeout_decay_seconds = 90
+
         self._keepalive_thread = None
         self._keepalive_running = False
         self._keepalive_interval = 15
         self._last_activity = 0
+        self._last_reconnect_time = 0
 
         self._min_request_interval = 0.02
         self._last_request_time = 0
 
-        self._bg_connection = None
+        self._user_connection = None
-        self._bg_lock = threading.Lock()
+        self._user_lock = threading.Lock()
-        self._bg_last_activity = 0
+        self._user_last_activity = 0
+        self._user_connection_logged = False
 
         self._subscribed_height = 0
         self._subscribed_height_time = 0
@@ -559,6 +577,8 @@ class ElectrumServer:
         return self._servers[index % len(self._servers)]
 
     def connect(self):
+        if self._stopping:
+            return
         sorted_servers = self.get_sorted_servers()
         for server in sorted_servers:
             try:
@@ -576,6 +596,8 @@ class ElectrumServer:
                 version_info = conn.get_server_version()
                 if version_info and len(version_info) > 0:
                     self._server_version = version_info[0]
+                prev_host = self._current_server_host
+                prev_port = self._current_server_port
                 self._current_server_host = server["host"]
                 self._current_server_port = server["port"]
                 self._connection = conn
@@ -585,6 +607,7 @@ class ElectrumServer:
                 self._all_servers_failed = False
                 self._update_server_score(server, success=True, latency_ms=connect_time)
                 self._last_activity = time.time()
+                self._last_reconnect_time = time.time()
                 if self._log:
                     if not self._initial_connection_logged:
                         self._log.info(
@@ -592,11 +615,15 @@ class ElectrumServer:
                             f"({self._server_version}, {connect_time:.0f}ms)"
                         )
                         self._initial_connection_logged = True
-                    else:
+                    elif server["host"] != prev_host or server["port"] != prev_port:
-                        self._log.debug(
+                        self._log.info(
-                            f"Reconnected to Electrum server: {server['host']}:{server['port']} "
+                            f"Switched to Electrum server: {server['host']}:{server['port']} "
                             f"({connect_time:.0f}ms)"
                         )
+                if self._stopping:
+                    conn.disconnect()
+                    self._connection = None
+                    return
                 if self._realtime_enabled:
                     self._start_realtime_listener()
                 self._start_keepalive()
@@ -609,8 +636,6 @@ class ElectrumServer:
                 self._update_server_score(server, success=False)
                 if self._is_rate_limit_error(str(e)):
                     self._blacklist_server(server, str(e))
-                if self._log:
-                    self._log.debug(f"Failed to connect to {server['host']}: {e}")
                 continue
         self._all_servers_failed = True
         raise TemporaryError(
@@ -673,11 +698,6 @@ class ElectrumServer:
             key = self._get_server_key(s)
             if key in self._server_blacklist:
                 if now < self._server_blacklist[key]:
-                    if self._log:
-                        remaining = int(self._server_blacklist[key] - now)
-                        self._log.debug(
-                            f"Skipping blacklisted server {key} ({remaining}s remaining)"
-                        )
                     continue
                 else:
                     del self._server_blacklist[key]
@@ -728,15 +748,14 @@ class ElectrumServer:
             if self._connection:
                 self._connection._start_listener()
                 result = self._connection.call(
-                    "blockchain.headers.subscribe", [], timeout=10
+                    "blockchain.headers.subscribe", [], timeout=20
                 )
                 if result and isinstance(result, dict):
                     height = result.get("height", 0)
                     if height > 0:
                         self._on_header_update(height)
-        except Exception as e:
+        except Exception:
-            if self._log:
+            pass
-                self._log.debug(f"Failed to subscribe to headers: {e}")
 
     def register_height_callback(self, callback):
         self._height_callback = callback
@@ -744,6 +763,11 @@ class ElectrumServer:
     def get_subscribed_height(self) -> int:
         return self._subscribed_height
 
+    def recently_reconnected(self, grace_seconds: int = 30) -> bool:
+        if self._last_reconnect_time == 0:
+            return False
+        return (time.time() - self._last_reconnect_time) < grace_seconds
+
     def get_server_scores(self) -> dict:
         return {
             self._get_server_key(s): {
@@ -781,7 +805,8 @@ class ElectrumServer:
                         return
                     time.sleep(1)
 
-                if time.time() - self._last_activity >= self._keepalive_interval:
+                now = time.time()
+                if now - self._last_activity >= self._keepalive_interval:
                     if self._connection and self._connection.is_connected():
                         if self._lock.acquire(blocking=False):
                             try:
@@ -802,6 +827,8 @@ class ElectrumServer:
         self._last_request_time = time.time()
 
     def _retry_on_failure(self):
+        if self._stopping:
+            return
         self._current_server_idx = (self._current_server_idx + 1) % len(self._servers)
         if self._connection:
             try:
@@ -824,17 +851,27 @@ class ElectrumServer:
             return False
 
     def call(self, method, params=None, timeout=10):
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
         self._throttle_request()
         lock_acquired = self._lock.acquire(timeout=timeout + 5)
         if not lock_acquired:
             raise TemporaryError(f"Electrum call timed out waiting for lock: {method}")
         try:
             for attempt in range(2):
+                if self._stopping:
+                    raise TemporaryError("Electrum server is shutting down")
                 if self._connection is None or not self._connection.is_connected():
                     self.connect()
+                    if self._connection is None:
+                        raise TemporaryError("Failed to establish Electrum connection")
                 elif (time.time() - self._last_activity) > 60:
                     if not self._check_connection_health():
                         self._retry_on_failure()
+                        if self._connection is None:
+                            raise TemporaryError(
+                                "Failed to re-establish Electrum connection"
+                            )
                 try:
                     result = self._connection.call(method, params, timeout=timeout)
                     self._last_activity = time.time()
@@ -851,17 +888,27 @@ class ElectrumServer:
             self._lock.release()
 
     def call_batch(self, requests, timeout=15):
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
         self._throttle_request()
         lock_acquired = self._lock.acquire(timeout=timeout + 5)
         if not lock_acquired:
             raise TemporaryError("Electrum batch call timed out waiting for lock")
         try:
             for attempt in range(2):
+                if self._stopping:
+                    raise TemporaryError("Electrum server is shutting down")
                 if self._connection is None or not self._connection.is_connected():
                     self.connect()
+                    if self._connection is None:
+                        raise TemporaryError("Failed to establish Electrum connection")
                 elif (time.time() - self._last_activity) > 60:
                     if not self._check_connection_health():
                         self._retry_on_failure()
+                        if self._connection is None:
+                            raise TemporaryError(
+                                "Failed to re-establish Electrum connection"
+                            )
                 try:
                     result = self._connection.call_batch(requests)
                     self._last_activity = time.time()
@@ -877,7 +924,9 @@ class ElectrumServer:
         finally:
             self._lock.release()
 
-    def _connect_background(self):
+    def _connect_user(self):
+        if self._stopping:
+            return False
         sorted_servers = self.get_sorted_servers()
         for server in sorted_servers:
             try:
@@ -890,105 +939,213 @@ class ElectrumServer:
                     proxy_port=self._proxy_port,
                 )
                 conn.connect()
-                self._bg_connection = conn
+                conn.get_server_version()
+                self._user_connection = conn
+                self._user_last_activity = time.time()
                 if self._log:
-                    self._log.debug(
+                    if not self._user_connection_logged:
-                        f"Background connection established to {server['host']}"
+                        self._log.debug(
-                    )
+                            f"User connection established to {server['host']}"
+                        )
+                        self._user_connection_logged = True
+                    else:
+                        self._log.debug(
+                            f"User connection reconnected to {server['host']}"
+                        )
                 return True
             except Exception as e:
                 if self._log:
-                    self._log.debug(
+                    self._log.debug(f"User connection failed to {server['host']}: {e}")
-                        f"Background connection failed to {server['host']}: {e}"
-                    )
                 continue
         return False
 
-    def call_background(self, method, params=None, timeout=10):
+    def _record_timeout(self):
-        lock_acquired = self._bg_lock.acquire(timeout=1)
+        if self._stopping:
+            return
+        now = time.time()
+        if (
+            now - self._last_timeout_time
+        ) > self._timeout_decay_seconds and self._last_timeout_time > 0:
+            self._consecutive_timeouts = 0
+        self._consecutive_timeouts += 1
+        self._last_timeout_time = now
+        if self._consecutive_timeouts >= self._max_consecutive_timeouts:
+            server = self._get_server(self._current_server_idx)
+            reason = f"{self._consecutive_timeouts} consecutive timeouts"
+            self._blacklist_server(server, reason)
+            self._consecutive_timeouts = 0
+            self._last_timeout_time = 0
+            try:
+                self._retry_on_failure()
+            except Exception:
+                pass
+
+    def call_background(self, method, params=None, timeout=20):
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
+        conn = self._connection
+        if conn is None or not conn.is_connected():
+            if self._stopping:
+                raise TemporaryError("Electrum server is shutting down")
+            try:
+                self.connect()
+                conn = self._connection
+            except Exception:
+                raise TemporaryError("Electrum call failed: no connection")
+            if conn is None or not conn.is_connected():
+                raise TemporaryError("Electrum call failed: no connection")
+        try:
+            result = conn.call(method, params, timeout=timeout)
+            self._last_activity = time.time()
+            return result
+        except TemporaryError as e:
+            if self._stopping:
+                raise TemporaryError("Electrum server is shutting down")
+            if "timed out" in str(e).lower():
+                self._record_timeout()
+            raise
+
+    def call_batch_background(self, requests, timeout=30):
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
+        conn = self._connection
+        if conn is None or not conn.is_connected():
+            if self._stopping:
+                raise TemporaryError("Electrum server is shutting down")
+            self._record_timeout()
+            conn = self._connection
+            if conn is None or not conn.is_connected():
+                try:
+                    self.connect()
+                    conn = self._connection
+                except Exception:
+                    raise TemporaryError("Electrum batch call failed: no connection")
+            if conn is None or not conn.is_connected():
+                raise TemporaryError("Electrum batch call failed: no connection")
+        try:
+            result = conn.call_batch(requests)
+            self._last_activity = time.time()
+            return result
+        except TemporaryError as e:
+            if self._stopping:
+                raise TemporaryError("Electrum server is shutting down")
+            if "timed out" in str(e).lower():
+                self._record_timeout()
+            raise
+
+    def call_user(self, method, params=None, timeout=10):
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
+        lock_acquired = self._user_lock.acquire(timeout=timeout + 2)
         if not lock_acquired:
-            return self.call(method, params, timeout)
+            raise TemporaryError(f"User connection busy: {method}")
 
         try:
-            if self._bg_connection is None or not self._bg_connection.is_connected():
+            if (
-                if not self._connect_background():
+                self._user_connection is None
-                    self._bg_lock.release()
+                or not self._user_connection.is_connected()
-                    return self.call(method, params, timeout)
+            ):
+                if not self._connect_user():
+                    raise TemporaryError("User connection unavailable")
 
             try:
-                result = self._bg_connection.call(method, params, timeout=timeout)
+                result = self._user_connection.call(method, params, timeout=timeout)
-                self._bg_last_activity = time.time()
+                self._user_last_activity = time.time()
                 return result
-            except Exception:
+            except Exception as e:
-                if self._bg_connection:
+                if self._log:
+                    self._log.debug(f"User call failed ({method}): {e}")
+                if self._user_connection:
                     try:
-                        self._bg_connection.disconnect()
+                        self._user_connection.disconnect()
                     except Exception:
                         pass
-                    self._bg_connection = None
+                    self._user_connection = None
 
-                if self._connect_background():
+                if self._connect_user():
                     try:
-                        result = self._bg_connection.call(
+                        result = self._user_connection.call(
                             method, params, timeout=timeout
                         )
-                        self._bg_last_activity = time.time()
+                        self._user_last_activity = time.time()
                         return result
-                    except Exception:
+                    except Exception as e2:
-                        pass
+                        raise TemporaryError(f"User call failed: {e2}")
 
-                return self.call(method, params, timeout)
+                raise TemporaryError(f"User call failed: {e}")
         finally:
-            self._bg_lock.release()
+            self._user_lock.release()
 
-    def call_batch_background(self, requests, timeout=15):
+    def call_batch_user(self, requests, timeout=15):
-        lock_acquired = self._bg_lock.acquire(timeout=1)
+        if self._stopping:
+            raise TemporaryError("Electrum server is shutting down")
+        lock_acquired = self._user_lock.acquire(timeout=timeout + 2)
         if not lock_acquired:
-            return self.call_batch(requests, timeout)
+            raise TemporaryError("User connection busy")
 
         try:
-            if self._bg_connection is None or not self._bg_connection.is_connected():
+            if (
-                if not self._connect_background():
+                self._user_connection is None
-                    self._bg_lock.release()
+                or not self._user_connection.is_connected()
-                    return self.call_batch(requests, timeout)
+            ):
+                if not self._connect_user():
+                    raise TemporaryError("User connection unavailable")
 
             try:
-                result = self._bg_connection.call_batch(requests)
+                result = self._user_connection.call_batch(requests)
-                self._bg_last_activity = time.time()
+                self._user_last_activity = time.time()
                 return result
-            except Exception:
+            except Exception as e:
-                if self._bg_connection:
+                if self._log:
+                    self._log.debug(f"User batch call failed: {e}")
+                if self._user_connection:
                     try:
-                        self._bg_connection.disconnect()
+                        self._user_connection.disconnect()
                     except Exception:
                         pass
-                    self._bg_connection = None
+                    self._user_connection = None
 
-                if self._connect_background():
+                if self._connect_user():
                     try:
-                        result = self._bg_connection.call_batch(requests)
+                        result = self._user_connection.call_batch(requests)
-                        self._bg_last_activity = time.time()
+                        self._user_last_activity = time.time()
                         return result
-                    except Exception:
+                    except Exception as e2:
-                        pass
+                        raise TemporaryError(f"User batch call failed: {e2}")
 
-                return self.call_batch(requests, timeout)
+                raise TemporaryError(f"User batch call failed: {e}")
         finally:
-            self._bg_lock.release()
+            self._user_lock.release()
 
     def disconnect(self):
         self._stop_keepalive()
-        with self._lock:
+        lock_acquired = self._lock.acquire(timeout=5)
-            if self._connection:
+        if lock_acquired:
-                self._connection.disconnect()
+            try:
-                self._connection = None
+                if self._connection:
-        with self._bg_lock:
+                    self._connection.disconnect()
-            if self._bg_connection:
+                    self._connection = None
+            finally:
+                self._lock.release()
+        else:
+            conn = self._connection
+            if conn:
                 try:
-                    self._bg_connection.disconnect()
+                    conn.disconnect()
                 except Exception:
                     pass
-                self._bg_connection = None
+        with self._user_lock:
+            if self._user_connection:
+                try:
+                    self._user_connection.disconnect()
+                except Exception:
+                    pass
+                self._user_connection = None
+                self._user_connection_logged = False
+
+    def shutdown(self):
+        self._stopping = True
+        self.disconnect()
 
     def get_balance(self, scripthash):
         result = self.call("blockchain.scripthash.get_balance", [scripthash])

basicswap/interface/firo.py

@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2022-2023 tecnovert
-# Copyright (c) 2024-2025 The Basicswap developers
+# Copyright (c) 2024-2026 The Basicswap developers
 # Distributed under the MIT software license, see the accompanying
 # file LICENSE or http://www.opensource.org/licenses/mit-license.php.
 
@@ -64,7 +64,7 @@ class FIROInterface(BTCInterface):
         # Firo shuts down after encryptwallet
         seed_id_before: str = self.getWalletSeedID() if check_seed else "Not found"
 
-        self.rpc_wallet("encryptwallet", [password])
+        self.rpc_wallet("encryptwallet", [password], timeout=120)
 
         if check_seed is False or seed_id_before == "Not found":
             return
@@ -102,6 +102,100 @@ class FIROInterface(BTCInterface):
             return addr_info["ismine"]
         return addr_info["ismine"] or addr_info["iswatchonly"]
 
+    def getNewSparkAddress(self) -> str:
+        try:
+            return self.rpc_wallet("getnewsparkaddress")[0]
+        except Exception as e:
+            self._log.error(f"getnewsparkaddress failed: {str(e)}")
+            raise
+
+    def getNewStealthAddress(self):
+        """Get a new Spark address (alias for consistency with other coins)."""
+        return self.getNewSparkAddress()
+
+    def getWalletInfo(self):
+        """Get wallet info including Spark balance."""
+        rv = super(FIROInterface, self).getWalletInfo()
+        try:
+            spark_balance_info = self.rpc("getsparkbalance")
+            # getsparkbalance returns amounts in atomic units (satoshis)
+            # Field names: availableBalance, unconfirmedBalance, fullBalance
+            confirmed = spark_balance_info.get("availableBalance", 0)
+            unconfirmed = spark_balance_info.get("unconfirmedBalance", 0)
+            full_balance = spark_balance_info.get("fullBalance", 0)
+            # Values are already in atomic units, keep as integers
+            # basicswap.py will format them using format_amount
+            rv["spark_balance"] = confirmed if confirmed else 0
+            rv["spark_unconfirmed"] = unconfirmed if unconfirmed else 0
+            immature = full_balance - confirmed - unconfirmed
+            rv["spark_immature"] = immature if immature > 0 else 0
+        except Exception as e:
+            self._log.warning(f"getsparkbalance failed: {str(e)}")
+            rv["spark_balance"] = 0
+            rv["spark_unconfirmed"] = 0
+            rv["spark_immature"] = 0
+        return rv
+
+    def createUTXO(self, value_sats: int):
+        # Create a new address and send value_sats to it
+
+        spendable_balance = self.getSpendableBalance()
+        if spendable_balance < value_sats:
+            raise ValueError("Balance too low")
+
+        address = self.getNewAddress(self._use_segwit, "create_utxo")
+        return (
+            self.withdrawCoin(self.format_amount(value_sats), "plain", address, False),
+            address,
+        )
+
+    def withdrawCoin(self, value, type_from: str, addr_to: str, subfee: bool) -> str:
+        """Withdraw coins, supporting both transparent and Spark transactions.
+
+        Args:
+            value: Amount to withdraw
+            type_from: "plain" for transparent, "spark" for Spark
+            addr_to: Destination address
+            subfee: Whether to subtract fee from amount
+        """
+        type_to = "spark" if addr_to.startswith("sm1") else "plain"
+
+        if "spark" in (type_from, type_to):
+            # RPC format: spendspark {"address": {"amount": ..., "subtractfee": ..., "memo": ...}}
+            # RPC wrapper will serialize this as: {"method": "spendspark", "params": [{...}], ...}
+            try:
+                if type_from == "spark":
+                    # Construct params: dict where address is the key, wrapped in array for RPC
+                    params = [
+                        {"address": addr_to, "amount": value, "subtractfee": subfee}
+                    ]
+                    result = self.rpc_wallet("spendspark", params)
+                else:
+                    # Use automintspark to perform a plain -> spark tx of full balance
+                    balance = self.rpc_wallet("getbalance")
+                    if str(balance) == str(value):
+                        result = self.rpc_wallet("automintspark")
+                    else:
+                        # subfee param is available on plain -> spark transactions
+                        mint_params = {"amount": value}
+                        if subfee:
+                            mint_params["subfee"] = True
+                        params = [{addr_to: mint_params}]
+                        result = self.rpc_wallet("mintspark", params)
+                # spendspark returns a txid string directly, in a result dict, or as an array
+                if isinstance(result, list) and len(result) > 0:
+                    return result[0]
+                if isinstance(result, dict):
+                    return result.get("txid", result.get("tx", ""))
+                return result
+            except Exception as e:
+                self._log.error(f"spark tx failed: {str(e)}")
+                raise
+        else:
+            # Use standard sendtoaddress for transparent transactions
+            params = [addr_to, value, "", "", subfee]
+            return self.rpc_wallet("sendtoaddress", params)
+
     def getSCLockScriptAddress(self, lock_script: bytes) -> str:
         lock_tx_dest = self.getScriptDest(lock_script)
         address = self.encodeScriptDest(lock_tx_dest)
@@ -252,10 +346,6 @@ class FIROInterface(BTCInterface):
         assert len(script_hash) == 20
         return CScript([OP_HASH160, script_hash, OP_EQUAL])
 
-    def withdrawCoin(self, value, addr_to, subfee):
-        params = [addr_to, value, "", "", subfee]
-        return self.rpc("sendtoaddress", params)
-
     def getWalletSeedID(self):
         return self.rpc("getwalletinfo")["hdmasterkeyid"]
 

basicswap/interface/ltc.py

@@ -209,11 +209,9 @@ class LTCInterface(BTCInterface):
 
         try:
             seed_id = self.getWalletSeedID()
-            self._log.debug(f"LTC unlockWallet getWalletSeedID returned: {seed_id}")
             needs_seed_init = seed_id == "Not found"
         except Exception as e:
-
+            self._log.debug(f"getWalletSeedID failed: {e}")
-            self._log.debug(f"getWalletSeedID failed: {e}, will initialize seed")
             needs_seed_init = True
         if needs_seed_init:
             self._log.info(f"Initializing HD seed for {self.coin_name()}.")
@@ -221,7 +219,7 @@ class LTCInterface(BTCInterface):
             if password:
                 self._log.info(f"Encrypting {self.coin_name()} wallet.")
                 try:
-                    self.rpc_wallet("encryptwallet", [password])
+                    self.rpc_wallet("encryptwallet", [password], timeout=120)
                 except Exception as e:
                     self._log.debug(f"encryptwallet returned: {e}")
                 import time
@@ -242,7 +240,7 @@ class LTCInterface(BTCInterface):
             check_seed = False
 
         if self.isWalletEncrypted():
-            self.rpc_wallet("walletpassphrase", [password, 100000000])
+            self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
 
         if check_seed:
             self._sc.checkWalletSeed(self.coin_type())
@@ -332,7 +330,7 @@ class LTCInterfaceMWEB(LTCInterface):
 
         if password is not None:
             # Max timeout value, ~3 years
-            self.rpc_wallet("walletpassphrase", [password, 100000000])
+            self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
 
         if self.getWalletSeedID() == "Not found":
             self._sc.initialiseWallet(self.interface_type())
@@ -341,7 +339,7 @@ class LTCInterfaceMWEB(LTCInterface):
             self.rpc("unloadwallet", ["mweb"])
             self.rpc("loadwallet", ["mweb"])
             if password is not None:
-                self.rpc_wallet("walletpassphrase", [password, 100000000])
+                self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
             self.rpc_wallet("keypoolrefill")
 
     def unlockWallet(self, password: str, check_seed: bool = True) -> None:
@@ -355,15 +353,12 @@ class LTCInterfaceMWEB(LTCInterface):
         if not self.has_mweb_wallet():
             self.init_wallet(password)
         else:
-            self.rpc_wallet("walletpassphrase", [password, 100000000])
+            self.rpc_wallet("walletpassphrase", [password, 100000000], timeout=120)
             try:
                 seed_id = self.getWalletSeedID()
-                self._log.debug(
-                    f"LTC_MWEB unlockWallet getWalletSeedID returned: {seed_id}"
-                )
                 needs_seed_init = seed_id == "Not found"
             except Exception as e:
-                self._log.debug(f"getWalletSeedID failed: {e}, will initialize seed")
+                self._log.debug(f"getWalletSeedID failed: {e}")
                 needs_seed_init = True
             if needs_seed_init:
                 self._log.info(f"Initializing HD seed for {self.coin_name()}.")

basicswap/interface/pivx.py

@@ -40,7 +40,7 @@ class PIVXInterface(BTCInterface):
 
         seed_id_before: str = self.getWalletSeedID()
 
-        self.rpc_wallet("encryptwallet", [password])
+        self.rpc_wallet("encryptwallet", [password], timeout=120)
 
         if check_seed is False or seed_id_before == "Not found":
             return

basicswap/js_server.py

@@ -79,9 +79,11 @@ def withdraw_coin(swap_client, coin_type, post_string, is_json):
         txid_hex = swap_client.withdrawParticl(
             type_from, type_to, value, address, subfee
         )
-    elif coin_type == Coins.LTC:
+    elif coin_type in (Coins.LTC, Coins.FIRO):
         type_from = get_data_entry_or(post_data, "type_from", "plain")
-        txid_hex = swap_client.withdrawLTC(type_from, value, address, subfee)
+        txid_hex = swap_client.withdrawCoinExtended(
+            coin_type, type_from, value, address, subfee
+        )
     elif coin_type in (Coins.XMR, Coins.WOW):
         txid_hex = swap_client.withdrawCoin(coin_type, value, address, sweepall)
     else:
@@ -181,6 +183,15 @@ def js_walletbalances(self, url_split, post_string, is_json) -> bytes:
                     version = ci.getDaemonVersion()
                     if version:
                         coin_entry["version"] = version
+                if (
+                    v["connection_type"] == "electrum"
+                    and hasattr(ci, "_backend")
+                    and ci._backend
+                    and hasattr(ci._backend, "getSyncStatus")
+                ):
+                    sync_status = ci._backend.getSyncStatus()
+                    coin_entry["electrum_synced"] = sync_status.get("synced", False)
+                    coin_entry["electrum_height"] = sync_status.get("height", 0)
 
                 coins_with_balances.append(coin_entry)
 
@@ -1254,7 +1265,6 @@ def js_getcoinseed(self, url_split, post_string, is_json) -> bytes:
             wallet_seed_id = f"Error: {e}"
         rv.update(
             {
-                "seed": seed_key.hex(),
                 "seed_id": seed_id.hex(),
                 "expected_seed_id": "Unset" if expect_seedid is None else expect_seedid,
                 "current_seed_id": wallet_seed_id,
@@ -1739,38 +1749,57 @@ def js_modeswitchinfo(self, url_split, post_string, is_json) -> bytes:
     }
 
     if direction == "lite":
-        legacy_balance_sats = 0
+        non_bip84_balance_sats = 0
-        has_legacy_funds = False
+        has_non_bip84_funds = False
         try:
             if hasattr(ci, "rpc_wallet"):
                 unspent = ci.rpc_wallet("listunspent")
-                hrp = ci.chainparams_network().get("hrp", "bc")
-                for u in unspent:
-                    if "address" in u and not u["address"].startswith(hrp + "1"):
-                        legacy_balance_sats += ci.make_int(u.get("amount", 0))
-                        has_legacy_funds = True
-        except Exception as e:
-            swap_client.log.debug(f"Error checking legacy addresses: {e}")
 
-        if has_legacy_funds and legacy_balance_sats > min_viable:
+                wm = swap_client.getWalletManager()
+
+                bip84_addresses = set()
+                if wm:
+                    try:
+                        all_addrs = wm.getAllAddresses(
+                            coin_type, include_watch_only=False
+                        )
+                        bip84_addresses = set(all_addrs)
+                    except Exception:
+                        pass
+
+                for u in unspent:
+                    addr = u.get("address")
+                    if not addr:
+                        continue
+                    amount_sats = ci.make_int(u.get("amount", 0))
+                    if amount_sats <= 0:
+                        continue
+
+                    if addr not in bip84_addresses:
+                        non_bip84_balance_sats += amount_sats
+                        has_non_bip84_funds = True
+        except Exception as e:
+            swap_client.log.debug(f"Error checking non-BIP84 addresses: {e}")
+
+        if has_non_bip84_funds and non_bip84_balance_sats > min_viable:
             rv["show_transfer_option"] = True
             rv["require_transfer"] = True
-            rv["legacy_balance_sats"] = legacy_balance_sats
+            rv["legacy_balance_sats"] = non_bip84_balance_sats
-            rv["legacy_balance"] = ci.format_amount(legacy_balance_sats)
+            rv["legacy_balance"] = ci.format_amount(non_bip84_balance_sats)
             rv["message"] = (
-                "Funds on legacy addresses must be transferred for external wallet compatibility"
+                "Funds on non-derivable addresses must be transferred for external wallet compatibility"
             )
         else:
             rv["show_transfer_option"] = False
             rv["require_transfer"] = False
-            if has_legacy_funds:
+            if has_non_bip84_funds:
-                rv["legacy_balance_sats"] = legacy_balance_sats
+                rv["legacy_balance_sats"] = non_bip84_balance_sats
-                rv["legacy_balance"] = ci.format_amount(legacy_balance_sats)
+                rv["legacy_balance"] = ci.format_amount(non_bip84_balance_sats)
-                rv["message"] = "Legacy balance too low to transfer"
+                rv["message"] = "Non-derivable balance too low to transfer"
             else:
                 rv["legacy_balance_sats"] = 0
                 rv["legacy_balance"] = "0"
-                rv["message"] = "All funds on native segwit addresses"
+                rv["message"] = "All funds on BIP84 addresses"
     else:
         rv["show_transfer_option"] = can_transfer
         if balance_sats == 0:

basicswap/rpc.py

@@ -152,15 +152,17 @@ class Jsonrpc:
                     pass
 
 
-def callrpc(rpc_port, auth, method, params=[], wallet=None, host="127.0.0.1"):
+def callrpc(
+    rpc_port, auth, method, params=[], wallet=None, host="127.0.0.1", timeout=None
+):
     if _use_rpc_pooling:
-        return callrpc_pooled(rpc_port, auth, method, params, wallet, host)
+        return callrpc_pooled(rpc_port, auth, method, params, wallet, host, timeout)
 
     try:
         url = "http://{}@{}:{}/".format(auth, host, rpc_port)
         if wallet is not None:
             url += "wallet/" + urllib.parse.quote(wallet)
-        x = Jsonrpc(url)
+        x = Jsonrpc(url, timeout=timeout if timeout else 10)
 
         v = x.json_request(method, params)
         x.close()
@@ -174,7 +176,9 @@ def callrpc(rpc_port, auth, method, params=[], wallet=None, host="127.0.0.1"):
     return r["result"]
 
 
-def callrpc_pooled(rpc_port, auth, method, params=[], wallet=None, host="127.0.0.1"):
+def callrpc_pooled(
+    rpc_port, auth, method, params=[], wallet=None, host="127.0.0.1", timeout=None
+):
     from .rpc_pool import get_rpc_pool
     import http.client
     import socket
@@ -183,6 +187,20 @@ def callrpc_pooled(rpc_port, auth, method, params=[], wallet=None, host="127.0.0
     if wallet is not None:
         url += "wallet/" + urllib.parse.quote(wallet)
 
+    if timeout:
+        try:
+            conn = Jsonrpc(url, timeout=timeout)
+            v = conn.json_request(method, params)
+            r = json.loads(v.decode("utf-8"))
+            conn.close()
+            if "error" in r and r["error"] is not None:
+                raise ValueError("RPC error " + str(r["error"]))
+            return r["result"]
+        except ValueError:
+            raise
+        except Exception as ex:
+            raise ValueError(f"RPC server error: {ex}, method: {method}")
+
     max_connections = _rpc_pool_settings.get("max_connections_per_daemon", 5)
     pool = get_rpc_pool(url, max_connections)
 
@@ -247,7 +265,7 @@ def make_rpc_func(port, auth, wallet=None, host="127.0.0.1"):
     wallet = wallet
     host = host
 
-    def rpc_func(method, params=None, wallet_override=None):
+    def rpc_func(method, params=None, wallet_override=None, timeout=None):
         return callrpc(
             port,
             auth,
@@ -255,6 +273,7 @@ def make_rpc_func(port, auth, wallet=None, host="127.0.0.1"):
             params,
             wallet if wallet_override is None else wallet_override,
             host,
+            timeout=timeout,
         )
 
     return rpc_func

basicswap/static/js/modules/notification-manager.js

@@ -610,7 +610,7 @@ function ensureToastContainer() {
         clickAction = `onclick="window.location.href='/bid/${options.bidId}'"`;
         cursorStyle = 'cursor-pointer';
       } else if (options.coinSymbol) {
-        clickAction = `onclick="window.location.href='/wallet/${options.coinSymbol}'"`;
+        clickAction = `onclick="window.location.href='/wallet/${options.coinSymbol.toLowerCase()}'"`;
         cursorStyle = 'cursor-pointer';
       } else if (options.releaseUrl) {
         clickAction = `onclick="window.open('${options.releaseUrl}', '_blank')"`;
@@ -739,9 +739,10 @@ function ensureToastContainer() {
         case 'sweep_completed':
           const sweepAmount = parseFloat(data.amount || 0).toFixed(8).replace(/\.?0+$/, '');
           const sweepFee = parseFloat(data.fee || 0).toFixed(8).replace(/\.?0+$/, '');
-          toastTitle = `Swept ${sweepAmount} ${data.coin_name} to RPC wallet`;
+          const sweepTicker = data.ticker || data.coin_name;
-          toastOptions.subtitle = `Fee: ${sweepFee} ${data.coin_name} • TXID: ${(data.txid || '').substring(0, 12)}...`;
+          toastTitle = `Swept ${sweepAmount} ${sweepTicker} to RPC wallet`;
-          toastOptions.coinSymbol = data.coin_name;
+          toastOptions.subtitle = `Fee: ${sweepFee} ${sweepTicker} • TXID: ${(data.txid || '').substring(0, 12)}...`;
+          toastOptions.coinSymbol = sweepTicker;
           toastOptions.txid = data.txid;
           toastType = 'sweep_completed';
           shouldShowToast = true;

basicswap/static/js/pages/bids-available-page.js

@@ -1,7 +1,7 @@
 const PAGE_SIZE = 50;
 
 const state = {
-    dentities: new Map(),
+    identities: new Map(),
     currentPage: 1,
     wsConnected: false,
     jsonData: [],

basicswap/static/js/pages/settings-page.js

@@ -251,15 +251,15 @@
           let transferSection = '';
           if (info.require_transfer && info.legacy_balance_sats > 0) {
             transferSection = `
-              <div class="bg-yellow-100 dark:bg-yellow-900/50 border border-yellow-400 dark:border-yellow-600 rounded-lg p-3 mb-3">
+              <div class="bg-gray-100 dark:bg-gray-700 border border-gray-300 dark:border-gray-500 rounded-lg p-3 mb-3">
-                <p class="text-sm font-medium text-yellow-800 dark:text-yellow-200 mb-2">Legacy Funds Transfer Required</p>
+                <p class="text-sm font-medium text-gray-900 dark:text-white mb-2">Funds Transfer Required</p>
-                <p class="text-xs text-gray-700 dark:text-gray-300 mb-2">
+                <p class="text-xs text-gray-700 dark:text-gray-200 mb-2">
-                  <strong>${info.legacy_balance} ${info.coin}</strong> on legacy addresses will be automatically transferred to a native segwit address.
+                  <strong>${info.legacy_balance} ${info.coin}</strong> on non-derivable addresses will be automatically transferred to a BIP84 address.
                 </p>
-                <p class="text-xs text-gray-600 dark:text-gray-400 mb-2">
+                <p class="text-xs text-gray-600 dark:text-gray-300 mb-2">
                   Est. fee: ${info.estimated_fee} ${info.coin}
                 </p>
-                <p class="text-xs text-gray-700 dark:text-gray-300">
+                <p class="text-xs text-gray-700 dark:text-gray-200">
                   This ensures your funds are recoverable using the extended key backup in external Electrum wallets.
                 </p>
                 <input type="hidden" name="transfer_choice" value="auto">
@@ -267,8 +267,8 @@
             `;
           } else if (info.legacy_balance_sats > 0 && !info.show_transfer_option) {
             transferSection = `
-              <p class="text-yellow-700 dark:text-yellow-300 text-xs mb-3">
+              <p class="text-gray-700 dark:text-gray-300 text-xs mb-3">
-                Some funds on legacy addresses (${info.legacy_balance} ${info.coin}) - too low to transfer.
+                Some funds on non-derivable addresses (${info.legacy_balance} ${info.coin}) - too low to transfer.
               </p>
             `;
           }
@@ -280,11 +280,22 @@
               </p>
               <p class="mb-2 text-gray-800 dark:text-gray-100"><strong>Extended Private Key (for external wallet import):</strong></p>
               <div class="bg-gray-50 dark:bg-gray-700 border border-gray-300 dark:border-gray-500 rounded p-2 mb-3">
-                <code class="text-xs break-all select-all font-mono text-gray-900 dark:text-gray-100">${data.account_key}</code>
+                <code id="extendedKeyDisplay" class="text-xs break-all font-mono text-gray-900 dark:text-gray-100">${'*'.repeat(Math.min(data.account_key.length, 80))}</code>
+                <code id="extendedKeyActual" class="text-xs break-all select-all font-mono text-gray-900 dark:text-gray-100 hidden">${data.account_key}</code>
+              </div>
+              <div class="mb-3">
+                <button type="button" id="toggleKeyVisibility" class="px-3 py-1 text-xs bg-blue-500 hover:bg-blue-600 text-white rounded">
+                  Show Key
+                </button>
+              </div>
+              <div class="text-xs text-gray-600 dark:text-gray-300 mb-3 bg-gray-100 dark:bg-gray-600 border border-gray-300 dark:border-gray-500 rounded p-2">
+                <p class="font-medium mb-1 text-gray-800 dark:text-gray-100">To import in Electrum wallet:</p>
+                <ol class="list-decimal list-inside space-y-0.5">
+                  <li>Open Electrum → File → New/Restore</li>
+                  <li>Choose "Standard wallet" → "Use a master key"</li>
+                  <li>Paste this key (starts with zprv... or yprv...)</li>
+                </ol>
               </div>
-              <p class="text-xs text-gray-600 dark:text-gray-300 mb-3">
-                This key can be imported into Electrum using "Use a master key" option.
-              </p>
               ${transferSection}
               <div class="border-t border-gray-300 dark:border-gray-500 pt-3">
                 <label class="flex items-center cursor-pointer hover:bg-gray-200 dark:hover:bg-gray-500 rounded p-1 -m-1">
@@ -294,6 +305,23 @@
               </div>
             `;
 
+            const toggleBtn = document.getElementById('toggleKeyVisibility');
+            const keyDisplay = document.getElementById('extendedKeyDisplay');
+            const keyActual = document.getElementById('extendedKeyActual');
+            if (toggleBtn && keyDisplay && keyActual) {
+              toggleBtn.addEventListener('click', () => {
+                if (keyDisplay.classList.contains('hidden')) {
+                  keyDisplay.classList.remove('hidden');
+                  keyActual.classList.add('hidden');
+                  toggleBtn.textContent = 'Show Key';
+                } else {
+                  keyDisplay.classList.add('hidden');
+                  keyActual.classList.remove('hidden');
+                  toggleBtn.textContent = 'Hide Key';
+                }
+              });
+            }
+
             const checkbox = document.getElementById('walletModeKeyConfirmCheckbox');
             if (checkbox) {
               checkbox.addEventListener('change', () => this.updateConfirmButtonState());
@@ -362,21 +390,21 @@
                 </p>
                 <div class="space-y-2">
                   <label class="flex items-start cursor-pointer hover:bg-gray-300 dark:hover:bg-gray-600 rounded p-1.5 -m-1">
-                    <input type="radio" name="transfer_choice" value="auto" class="mt-0.5 mr-2 h-4 w-4 text-blue-600 border-gray-400 dark:border-gray-400 focus:ring-blue-500 bg-white dark:bg-gray-500">
+                    <input type="radio" name="transfer_choice" value="auto" checked class="mt-0.5 mr-2 h-4 w-4 text-blue-600 border-gray-400 dark:border-gray-400 focus:ring-blue-500 bg-white dark:bg-gray-500">
                     <div>
                       <span class="text-sm font-medium text-gray-900 dark:text-white">Auto-transfer funds to RPC wallet</span>
                       <p class="text-xs text-gray-600 dark:text-gray-300">Recommended. Ensures all funds visible in full node wallet.</p>
                     </div>
                   </label>
                   <label class="flex items-start cursor-pointer hover:bg-gray-300 dark:hover:bg-gray-600 rounded p-1.5 -m-1">
-                    <input type="radio" name="transfer_choice" value="manual" checked class="mt-0.5 mr-2 h-4 w-4 text-blue-600 border-gray-400 dark:border-gray-400 focus:ring-blue-500 bg-white dark:bg-gray-500">
+                    <input type="radio" name="transfer_choice" value="manual" class="mt-0.5 mr-2 h-4 w-4 text-blue-600 border-gray-400 dark:border-gray-400 focus:ring-blue-500 bg-white dark:bg-gray-500">
                     <div>
                       <span class="text-sm font-medium text-gray-900 dark:text-white">Keep funds on current addresses</span>
                       <p class="text-xs text-gray-600 dark:text-gray-300">Transfer manually later if needed.</p>
                     </div>
                   </label>
                 </div>
-                <p class="text-xs text-red-600 dark:text-red-400 mt-3">
+                <p class="text-xs text-gray-600 dark:text-gray-400 mt-3">
                   If you skip transfer, you will need to manually send funds from lite wallet addresses to your RPC wallet.
                 </p>
               </div>

basicswap/static/js/pages/wallets-page.js

@@ -87,7 +87,7 @@
         }
       }
 
-      if (coinData.scan_status) {
+      if (coinData.scan_status || coinData.electrum_synced !== undefined) {
         this.updateScanStatus(coinData);
       }
 
@@ -110,7 +110,7 @@
       if (!scanStatusEl) return;
 
       const status = coinData.scan_status;
-      if (status.in_progress) {
+      if (status && status.in_progress) {
         scanStatusEl.innerHTML = `
           <div class="flex items-center justify-between text-xs">
             <span class="text-blue-600 dark:text-blue-300">
@@ -126,13 +126,29 @@
             <div class="bg-blue-600 dark:bg-blue-400 h-1 rounded-full transition-all" style="width: ${status.progress}%"></div>
           </div>
         `;
+      } else if (coinData.electrum_synced) {
+        const height = coinData.electrum_height || '';
+        scanStatusEl.innerHTML = `
+          <div class="bg-green-50 dark:bg-gray-500 p-2 rounded">
+            <div class="flex items-center text-xs text-green-600 dark:text-green-400">
+              Electrum Wallet Synced (${height})
+            </div>
+          </div>
+        `;
+      } else if (coinData.electrum_synced === false) {
+        scanStatusEl.innerHTML = `
+          <div class="bg-yellow-50 dark:bg-gray-500 p-2 rounded">
+            <div class="flex items-center text-xs text-yellow-600 dark:text-yellow-400">
+              Waiting for Electrum Server...
+            </div>
+          </div>
+        `;
       } else {
         scanStatusEl.innerHTML = `
-          <div class="flex items-center text-xs text-green-600 dark:text-green-400">
+          <div class="bg-green-50 dark:bg-gray-500 p-2 rounded">
-            <svg class="inline-block w-3 h-3 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <div class="flex items-center text-xs text-green-600 dark:text-green-400">
-              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path>
+              Electrum Wallet Synced
-            </svg>
+            </div>
-            Electrum Wallet Synced
           </div>
         `;
       }

basicswap/templates/settings.html

@@ -167,29 +167,31 @@
          <div class="bg-gray-50 dark:bg-gray-700 rounded-lg p-4 space-y-4">
 
           <div>
-           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">To Light Wallet:</p>
+           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">Light Wallet Mode (Electrum):</p>
            <ul class="text-xs text-gray-700 dark:text-gray-200 space-y-0.5 ml-3">
-            <li>• Your full node stops running</li>
+            <li>• No blockchain download needed - connect via external Electrum servers</li>
-            <li>• Light wallet uses your seed to access existing funds</li>
+            <li>• Uses BIP84 derivation (native SegWit) - lower fees, modern addresses (bc1q.../ltc1q...)</li>
-            <li>• No transfer needed - same seed, same funds</li>
+            <li>• You receive an extended private key (zprv/...) that can be imported into external wallets</li>
+            <li>• Best for: fresh installs, low storage, quick setup, mobile-friendly</li>
            </ul>
           </div>
 
           <div>
-           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">While in Light Wallet mode:</p>
+           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">Full Node Mode (RPC):</p>
            <ul class="text-xs text-gray-700 dark:text-gray-200 space-y-0.5 ml-3">
-            <li>• Light wallet generates NEW addresses (BIP84 format: bc1q.../ltc1q...)</li>
+            <li>• Maximum privacy - no external servers, your node validates everything</li>
-            <li>• Any funds you RECEIVE go to these new addresses</li>
+            <li>• More wallet features: coin control, RBF, CPFP, raw transactions</li>
-            <li>• Your full node doesn't know about these addresses</li>
+            <li>• Supports legacy address types and coin-specific features (e.g. MWEB for LTC)</li>
+            <li>• Best for: existing node users, power users, maximum control</li>
            </ul>
           </div>
 
           <div>
-           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">To Full Node:</p>
+           <p class="text-xs font-medium text-gray-900 dark:text-white mb-1">When switching modes:</p>
            <ul class="text-xs text-gray-700 dark:text-gray-200 space-y-0.5 ml-3">
-            <li>• Full node can't see funds on light wallet addresses</li>
+            <li>• To Light: Save your BIP84 key shown during switch (for external wallet import)</li>
-            <li>• These funds must be SENT back to your node wallet (real transaction, network fee applies based on current rate)</li>
+            <li>• To Full Node: Funds on light wallet addresses must be transferred (network fee applies)</li>
-            <li>• Enable "Auto-transfer" in Fund Transfer section to do this automatically on unlock</li>
+            <li>• Both modes share the same seed - switching is safe, just save keys when shown</li>
            </ul>
           </div>
 
@@ -259,13 +261,12 @@
         </div>
 
         <div id="fund-transfer-section-{{ c.name }}" class="mb-6 hidden">
+         {% if c.lite_wallet_balance %}
          <h4 class="text-sm font-medium text-gray-900 dark:text-white mb-4">
-          Fund Transfer
+          Pending Balance
          </h4>
-
          <div class="bg-gray-50 dark:bg-gray-700 rounded-lg p-4">
-          {% if c.lite_wallet_balance %}
+          <div class="p-3 bg-orange-50 dark:bg-orange-900/30 border border-orange-200 dark:border-orange-700 rounded-lg">
-          <div class="mb-4 p-3 bg-orange-50 dark:bg-orange-900/30 border border-orange-200 dark:border-orange-700 rounded-lg">
            <p class="text-sm font-medium text-orange-800 dark:text-orange-200 mb-2">
             <svg class="inline w-4 h-4 mr-1" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z" clip-rule="evenodd"></path></svg>
             Light Wallet Balance Detected
@@ -292,24 +293,24 @@
             {% endif %}
            </div>
           </div>
-          {% endif %}
+         </div>
-          <label class="flex items-center cursor-pointer">
+         {% endif %}
-           <input type="checkbox" name="auto_transfer_{{ c.name }}" value="true" {% if c.auto_transfer_on_mode_switch != false %}checked{% endif %} class="w-4 h-4 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600">
-           <span class="ml-2 text-sm font-medium text-red-600 dark:text-red-400">Auto-transfer funds when switching to Full Node</span>
-          </label>
-          <p class="text-xs text-gray-500 dark:text-gray-400 mt-2 ml-6">Funds in light wallet addresses will be swept to your RPC wallet after switching. Network fee applies based on current rate.</p>
 
-          {% if general_settings.debug %}
+         {% if general_settings.debug %}
-          <div class="mt-4 pt-4 border-t border-gray-200 dark:border-gray-600">
+         <h4 class="text-sm font-medium text-gray-900 dark:text-white mb-4 {% if c.lite_wallet_balance %}mt-6{% endif %}">
+          Advanced
+         </h4>
+         <div class="bg-gray-50 dark:bg-gray-700 rounded-lg p-4">
+          <div>
            <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Address Gap Limit</label>
            <div class="flex items-center">
-            <input type="number" name="gap_limit_{{ c.name }}" value="{{ c.address_gap_limit }}" min="5" max="100" class="hover:border-blue-500 bg-gray-50 text-gray-900 appearance-none dark:bg-gray-700 dark:text-white border border-gray-300 dark:border-gray-600 dark:placeholder-gray-400 text-sm rounded-lg outline-none focus:ring-blue-500 focus:border-blue-500 block w-24 p-2.5 focus:ring-1 focus:outline-none" placeholder="20">
+            <input type="number" name="gap_limit_{{ c.name }}" value="{{ c.address_gap_limit }}" min="5" max="100" class="hover:border-blue-500 bg-gray-50 text-gray-900 appearance-none dark:bg-gray-700 dark:text-white border border-gray-300 dark:border-gray-600 dark:placeholder-gray-400 text-sm rounded-lg outline-none focus:ring-blue-500 focus:border-blue-500 block w-24 p-2.5 focus:ring-1 focus:outline-none" placeholder="50">
             <span class="ml-2 text-xs text-gray-500 dark:text-gray-400">(5-100)</span>
            </div>
            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">Number of consecutive unfunded addresses to scan. Increase if you generated many unused addresses.</p>
           </div>
-          {% endif %}
          </div>
+         {% endif %}
         </div>
         {% endif %}
         {% endif %}
@@ -864,7 +865,7 @@
             Switch Mode
           </button>
           <button type="button" id="walletModeCancel"
-                  class="px-4 py-2.5 bg-gray-300 hover:bg-gray-400 dark:bg-gray-600 dark:hover:bg-gray-700 font-medium text-sm text-gray-700 dark:text-white rounded-md focus:ring-0 focus:outline-none">
+                  class="px-4 py-2.5 bg-gray-200 hover:bg-gray-300 dark:bg-gray-600 dark:hover:bg-gray-700 font-medium text-sm text-gray-800 dark:text-white rounded-md border border-gray-300 dark:border-gray-500 focus:ring-0 focus:outline-none">
             Cancel
           </button>
         </div>

basicswap/templates/wallet.html

@@ -35,6 +35,8 @@
 </section>
 {% endif %}
 
+
+
 {% if w.havedata %}
 {% if w.error %}
 <section class="py-4 px-6" id="messages_error" role="alert">
@@ -183,8 +185,20 @@
                             {% endif %}
                           </td>
                         </tr>
+                        {% elif w.cid == '13' %} {# FIRO #}
+                        <tr class="opacity-100 text-gray-500 dark:text-gray-100 hover:bg-coolGray-200 dark:hover:bg-gray-600">
+                          <td class="py-3 px-6 bold"> <span class="inline-flex align-middle items-center justify-center w-9 h-10 bg-white-50 rounded"> <img class="h-7" src="/static/images/coins/{{ w.name }}.png" alt="{{ w.name }} Spark"> </span>Spark Balance: </td>
+                          <td class="py-3 px-6 bold">
+                            <span class="coinname-value" data-coinname="{{ w.name }}">{{ w.spark_balance }} {{ w.ticker }}</span>
+                            (<span class="usd-value"></span>)
+                            {% if w.spark_pending %}
+                              <span class="inline-block py-1 px-2 rounded-full bg-green-100 text-green-500 dark:bg-gray-500 dark:text-green-500">Pending: +{{ w.spark_pending }} {{ w.ticker }} </span>
+                            {% endif %}
+                          </td>
+                        </tr>
                         {% endif %}
                         {# / LTC #}
+                        {# / FIRO #}
                         {% if w.locked_utxos %}
                         <tr class="opacity-100 text-gray-500 dark:text-gray-100 hover:bg-coolGray-200 dark:hover:bg-gray-600">
                           <td class="py-3 px-6 bold">Locked Outputs:</td>
@@ -230,7 +244,11 @@
                           <td class="py-3 px-6 bold">Synced:</td>
                           <td class="py-3 px-6">
                             {% if is_electrum_mode %}
-                            <span class="text-green-600 dark:text-green-400">Electrum Wallet Synced</span>
+                              {% if w.electrum_synced %}
+                            <span class="text-green-600 dark:text-green-400">Electrum Wallet Synced ({{ w.electrum_height }})</span>
+                              {% else %}
+                            <span class="text-yellow-600 dark:text-yellow-400">Waiting for Electrum Server...</span>
+                              {% endif %}
                             {% else %}
                             {{ w.synced }}
                             {% endif %}
@@ -394,8 +412,8 @@
                           </div>
                         </div>
                       </div>
-                     {% if w.cid in '1, 3, 6, 9' %}
+                     {% if w.cid in '1, 3, 6, 9, 13' %}
-                     {# PART | LTC | XMR | WOW | #}
+                     {# PART | LTC | XMR | WOW | FIRO #}
                       <div class="w-full md:w-1/2 p-3 flex justify-center items-center">
                         <div class="h-full">
                           <div class="flex flex-wrap -m-3">
@@ -444,6 +462,22 @@
                               </div>
                               {% endif %}
                               {# / LTC #}
+                              {% elif w.cid == '13' %}
+                             {# FIRO #}
+                                  <div id="qrcode-spark" class="qrcode" data-qrcode data-address="{{ w.spark_address }}"> </div>
+                                </div>
+                              </div>
+                              <div class="font-normal bold text-gray-500 text-center dark:text-white mb-5">Spark Address: </div>
+                              <div class="text-center relative">
+                                <div class="input-like-container hover:border-blue-500 bg-gray-50 text-gray-900 appearance-none pr-10 dark:bg-gray-500 dark:text-white border border-gray-300 dark:border-gray-400 dark:text-gray-50 dark:placeholder-gray-400 text-lg lg:text-sm rounded-lg outline-none focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 focus:ring-0" id="stealth_address">{{ w.spark_address }}</div>
+                                <span class="absolute inset-y-0 right-0 flex items-center pr-3 cursor-pointer" id="copyIcon"></span>
+                              </div>
+                              <div class="opacity-100 text-gray-500 dark:text-gray-100 flex justify-center items-center">
+                                <div class="py-3 px-6 bold mt-5">
+                                  <button type="submit" class="flex justify-center py-2 px-4 bg-blue-500 hover:bg-blue-600 font-medium text-sm text-white border border-blue-500 rounded-md shadow-button focus:ring-0 focus:outline-none" name="newsparkaddr_{{ w.cid }}" value="New Spark Address"> {{ circular_arrows_svg }} New Spark Address </button>
+                                </div>
+                              </div>
+                              {# / FIRO #}
                               {% endif %}
                                </div>
                              </div>
@@ -507,6 +541,15 @@
             {% endif %}
            </td>
           </tr>
+          {% elif w.cid == '13' %}
+          {# FIRO #}
+          <tr class="opacity-100 text-gray-500 dark:text-gray-100">
+           <td class="py-4 pl-6 bold w-1/4"> <span class="inline-flex align-middle items-center justify-center w-9 h-10 bg-white-50 rounded"> <img class="h-7" src="/static/images/coins/{{ w.name }}.png" alt="{{ w.name }}"> </span>Spark Balance: </td>
+           <td class="py-3 px-6">
+            <span class="coinname-value" data-coinname="{{ w.name }}">{{ w.spark_balance }} {{ w.ticker }}</span>
+            (<span class="usd-value"></span>)
+           </td>
+          </tr>
           {% elif w.cid == '1' %}
           {# PART #}
           <tr class="opacity-100 text-gray-500 dark:text-gray-100">
@@ -597,6 +640,14 @@
 <button type="button" class="ml-2 py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(1, '{{ w.balance }}', {{ w.cid }}, '{{ w.mweb_balance }}')">100%</button>
 
 {# / LTC #}
+
+{% elif w.cid == '13' %}
+{# FIRO #}
+<button type="button" class="hidden md:block py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(0.25, '{{ w.balance }}', {{ w.cid }}, '{{ w.spark_balance }}')">25%</button>
+<button type="button" class="hidden md:block ml-2 py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(0.5, '{{ w.balance }}', {{ w.cid }}, '{{ w.spark_balance }}')">50%</button>
+<button type="button" class="ml-2 py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(1, '{{ w.balance }}', {{ w.cid }}, '{{ w.spark_balance }}')">100%</button>
+
+{# / FIRO #}
 {% else %}
 <button type="button" class="hidden md:block py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(0.25, '{{ w.balance }}', {{ w.cid }})">25%</button>
 <button type="button" class="hidden md:block ml-2 py-1 px-2 bg-blue-500 text-white text-lg lg:text-sm rounded-md focus:outline-none" onclick="setAmount(0.5, '{{ w.balance }}', {{ w.cid }})">50%</button>
@@ -663,8 +714,21 @@
             </div>
            </td>
           </tr>
+          {% elif w.cid == '13' %} {# FIRO #}
+          <tr class="opacity-100 text-gray-500 dark:text-gray-100">
+           <td class="py-3 px-6 bold">Type From:</td>
+           <td class="py-3 px-6">
+            <div class="w-full md:flex-1">
+             <div class="relative"> {{ select_box_arrow_svg }} <select id="withdraw_type" class="{{ select_box_class }}" name="withdraw_type_from_{{ w.cid }}">
+               <option value="spark" {% if w.wd_type_from=='spark' %} selected{% endif %}>Spark</option>
+               <option value="plain" {% if w.wd_type_from=='plain' %} selected{% endif %}>Plain</option>
+              </select> </div>
+            </div>
+           </td>
+          </tr>
           {% endif %}
           {# / LTC #}
+          {# / FIRO #}
           {% if w.cid not in '6,9' %} {# Not XMR WOW #}
           <tr class="opacity-100 text-gray-500 dark:text-gray-100">
            <td class="py-3 px-6 bold">Fee Rate:</td>

basicswap/templates/wallets.html

@@ -148,6 +148,28 @@
        {% endif %}
        {% endif %}
        {# / LTC #}
+       {% if w.cid == '13' %} {# FIRO #}
+       <div class="flex mb-2 justify-between items-center">
+        <h4 class="text-xs font-medium dark:text-white">Spark Balance:</h4>
+        <span class="bold inline-block py-1 px-2 rounded-full bg-blue-100 text-xs text-black-500 dark:bg-gray-500 dark:text-gray-200 coinname-value" data-coinname="{{ w.name }}">{{ w.spark_balance }} {{ w.ticker }}</span>
+       </div>
+        <div class="flex mb-2 justify-between items-center">
+          <h4 class="text-xs font-medium dark:text-white">Spark USD value:</h4>
+          <div class="bold inline-block py-1 px-2 rounded-full bg-blue-100 text-xs text-black-500 dark:bg-gray-500 dark:text-gray-200 usd-value"></div>
+        </div>
+        {% if w.spark_pending %}
+       <div class="flex mb-2 justify-between items-center">
+        <h4 class="text-xs font-bold text-green-500 dark:text-green-500">Spark Pending:</h4>
+        <span class="bold inline-block py-1 px-2 rounded-full bg-green-100 text-xs text-green-500 dark:bg-gray-500 dark:text-green-500 coinname-value"  data-coinname="{{ w.name }}">
+        +{{ w.spark_pending }} {{ w.ticker }}</span>
+       </div>
+        <div class="flex mb-2 justify-between items-center">
+          <h4 class="text-xs font-bold text-green-500 dark:text-green-500">Spark Pending USD value:</h4>
+          <div class="bold inline-block py-1 px-2 rounded-full bg-green-100 text-xs text-green-500 dark:bg-gray-500 dark:text-green-500 usd-value"></div>
+        </div>
+       {% endif %}
+       {% endif %}
+       {# / FIRO #}
        <hr class="border-t border-gray-100 dark:border-gray-500 my-5">
        <div class="flex mb-2 justify-between items-center">
         <h4 class="text-xs font-medium dark:text-white">Blocks:</h4>
@@ -193,10 +215,16 @@
             <div class="bg-blue-600 dark:bg-blue-400 h-1 rounded-full" style="width: {{ w.scan_status.progress }}%"></div>
           </div>
         </div>
-        {% else %}
+        {% elif w.electrum_synced %}
         <div class="bg-green-50 dark:bg-gray-500 p-2 rounded">
           <div class="flex items-center text-xs text-green-600 dark:text-green-400">
-            Electrum Wallet Synced
+            Electrum Wallet Synced ({{ w.electrum_height }})
+          </div>
+        </div>
+        {% else %}
+        <div class="bg-yellow-50 dark:bg-gray-500 p-2 rounded">
+          <div class="flex items-center text-xs text-yellow-600 dark:text-yellow-400">
+            Waiting for Electrum Server...
           </div>
         </div>
         {% endif %}

basicswap/ui/page_settings.py

@@ -189,7 +189,7 @@ def page_settings(self, url_split, post_string):
                                 )
                                 data["auto_transfer_now"] = transfer_value == "true"
                             gap_limit_str = get_data_entry_or(
-                                form_data, "gap_limit_" + name, "20"
+                                form_data, "gap_limit_" + name, "50"
                             ).strip()
                             try:
                                 gap_limit = int(gap_limit_str)
@@ -295,7 +295,7 @@ def page_settings(self, url_split, post_string):
                 "supports_electrum": name in electrum_supported_coins,
                 "clearnet_servers_text": clearnet_text,
                 "onion_servers_text": onion_text,
-                "address_gap_limit": c.get("address_gap_limit", 20),
+                "address_gap_limit": c.get("address_gap_limit", 50),
             }
         )
         if name in ("monero", "wownero"):

basicswap/ui/page_wallet.py

@@ -90,6 +90,10 @@ def format_wallet_data(swap_client, ci, w):
         wf["mweb_address"] = w.get("mweb_address", "?")
         wf["mweb_balance"] = w.get("mweb_balance", "?")
         wf["mweb_pending"] = w.get("mweb_pending", "?")
+    elif ci.coin_type() == Coins.FIRO:
+        wf["spark_address"] = w.get("spark_address", "?")
+        wf["spark_balance"] = w.get("spark_balance", "?")
+        wf["spark_pending"] = w.get("spark_pending", "?")
 
     if hasattr(ci, "getScanStatus"):
         wf["scan_status"] = ci.getScanStatus()
@@ -114,6 +118,13 @@ def format_wallet_data(swap_client, ci, w):
         except Exception:
             wf["electrum_connected"] = False
             wf["electrum_status"] = "error"
+        try:
+            sync_status = backend.getSyncStatus()
+            wf["electrum_synced"] = sync_status.get("synced", False)
+            wf["electrum_height"] = sync_status.get("height", 0)
+        except Exception:
+            wf["electrum_synced"] = False
+            wf["electrum_height"] = 0
 
     checkAddressesOwned(swap_client, ci, wf)
     return wf
@@ -264,6 +275,8 @@ def page_wallet(self, url_split, post_string):
             force_refresh = True
         elif have_data_entry(form_data, "newmwebaddr_" + cid):
             swap_client.cacheNewStealthAddressForCoin(coin_id)
+        elif have_data_entry(form_data, "newsparkaddr_" + cid):
+            swap_client.cacheNewStealthAddressForCoin(coin_id)
         elif have_data_entry(form_data, "reseed_" + cid):
             try:
                 swap_client.reseedWallet(coin_id)
@@ -325,7 +338,7 @@ def page_wallet(self, url_split, post_string):
                     page_data["wd_type_to_" + cid] = type_to
                 except Exception as e:  # noqa: F841
                     err_messages.append("Missing type")
-            elif coin_id == Coins.LTC:
+            elif coin_id in (Coins.LTC, Coins.FIRO):
                 try:
                     type_from = form_data[bytes("withdraw_type_from_" + cid, "utf-8")][
                         0
@@ -354,9 +367,9 @@ def page_wallet(self, url_split, post_string):
                                 value, ticker, type_from, type_to, address, txid
                             )
                         )
-                    elif coin_id == Coins.LTC:
+                    elif coin_id in (Coins.LTC, Coins.FIRO):
-                        txid = swap_client.withdrawLTC(
+                        txid = swap_client.withdrawCoinExtended(
-                            type_from, value, address, subfee
+                            coin_id, type_from, value, address, subfee
                         )
                         messages.append(
                             "Withdrew {} {} (from {}) to address {}<br/>In txid: {}".format(
@@ -429,8 +442,12 @@ def page_wallet(self, url_split, post_string):
                 if swap_client.debug is True:
                     swap_client.log.error(traceback.format_exc())
 
+    is_electrum_mode = (
+        swap_client.coin_clients.get(coin_id, {}).get("connection_type") == "electrum"
+    )
+
     swap_client.updateWalletsInfo(
-        force_refresh, only_coin=coin_id, wait_for_complete=True
+        force_refresh, only_coin=coin_id, wait_for_complete=not is_electrum_mode
     )
     wallets = swap_client.getCachedWalletsInfo({"coin_id": coin_id})
     wallet_data = {}
@@ -469,6 +486,8 @@ def page_wallet(self, url_split, post_string):
             wallet_data["main_address"] = w.get("main_address", "Refresh necessary")
         elif k == Coins.LTC:
             wallet_data["mweb_address"] = w.get("mweb_address", "Refresh necessary")
+        elif k == Coins.FIRO:
+            wallet_data["spark_address"] = w.get("spark_address", "Refresh necessary")
 
         if "wd_type_from_" + cid in page_data:
             wallet_data["wd_type_from"] = page_data["wd_type_from_" + cid]

basicswap/wallet_backend.py

@@ -197,7 +197,11 @@ class ElectrumBackend(WalletBackend):
         self._cached_height_time = 0
         self._height_cache_ttl = 5
 
-        self._max_batch_size = 10
+        self._cached_fee = {}
+        self._cached_fee_time = {}
+        self._fee_cache_ttl = 300
+
+        self._max_batch_size = 5
         self._background_mode = False
 
     def setBackgroundMode(self, enabled: bool):
@@ -206,13 +210,20 @@ class ElectrumBackend(WalletBackend):
     def _call(self, method: str, params: list = None, timeout: int = 10):
         if self._background_mode and hasattr(self._server, "call_background"):
             return self._server.call_background(method, params, timeout)
+        if hasattr(self._server, "call_user"):
+            return self._server.call_user(method, params, timeout)
         return self._server.call(method, params, timeout)
 
     def _call_batch(self, calls: list, timeout: int = 15):
         if self._background_mode and hasattr(self._server, "call_batch_background"):
             return self._server.call_batch_background(calls, timeout)
+        if hasattr(self._server, "call_batch_user"):
+            return self._server.call_batch_user(calls, timeout)
         return self._server.call_batch(calls, timeout)
 
+    def _is_server_stopping(self) -> bool:
+        return getattr(self._server, "_stopping", False)
+
     def _split_batch_call(
         self, scripthashes: list, method: str, batch_size: int = None
     ) -> list:
@@ -221,19 +232,30 @@ class ElectrumBackend(WalletBackend):
 
         all_results = []
         for i in range(0, len(scripthashes), batch_size):
+            if self._is_server_stopping():
+                self._log.debug("_split_batch_call: server stopping, aborting")
+                break
             chunk = scripthashes[i : i + batch_size]
             try:
                 calls = [(method, [sh]) for sh in chunk]
                 results = self._call_batch(calls)
                 all_results.extend(results)
-            except Exception as e:
+            except Exception:
-                self._log.debug(f"Batch chunk failed ({len(chunk)} items): {e}")
+                if self._is_server_stopping():
+                    self._log.debug(
+                        "_split_batch_call: server stopping after batch failure, aborting"
+                    )
+                    break
                 for sh in chunk:
+                    if self._is_server_stopping():
+                        self._log.debug(
+                            "_split_batch_call: server stopping during fallback, aborting"
+                        )
+                        break
                     try:
                         result = self._call(method, [sh])
                         all_results.append(result)
-                    except Exception as e2:
+                    except Exception:
-                        self._log.debug(f"Individual call failed for {sh[:8]}...: {e2}")
                         all_results.append(None)
         return all_results
 
@@ -298,8 +320,10 @@ class ElectrumBackend(WalletBackend):
         if not addr_list:
             return result
 
-        batch_size = 10
+        batch_size = self._max_batch_size
         for batch_start in range(0, len(addr_list), batch_size):
+            if self._is_server_stopping():
+                break
             batch = addr_list[batch_start : batch_start + batch_size]
 
             addr_to_scripthash = {}
@@ -332,6 +356,8 @@ class ElectrumBackend(WalletBackend):
                     batch_success = True
                     break
                 except Exception as e:
+                    if self._is_server_stopping():
+                        break
                     if attempt == 0:
                         self._log.debug(
                             f"Batch detailed balance query failed, reconnecting: {e}"
@@ -348,6 +374,8 @@ class ElectrumBackend(WalletBackend):
 
             if not batch_success:
                 for addr, scripthash in addr_to_scripthash.items():
+                    if self._is_server_stopping():
+                        break
                     try:
                         balance = self._call(
                             "blockchain.scripthash.get_balance", [scripthash]
@@ -569,13 +597,22 @@ class ElectrumBackend(WalletBackend):
             return self._cached_height if self._cached_height > 0 else 0
 
     def estimateFee(self, blocks: int = 6) -> int:
+        now = time.time()
+        cache_key = blocks
+        if cache_key in self._cached_fee:
+            if (now - self._cached_fee_time.get(cache_key, 0)) < self._fee_cache_ttl:
+                return self._cached_fee[cache_key]
+
         try:
             fee = self._call("blockchain.estimatefee", [blocks])
             if fee and fee > 0:
-                return int(fee * 1e8 / 1000)
+                result = int(fee * 1e8 / 1000)
-            return 1
+                self._cached_fee[cache_key] = result
+                self._cached_fee_time[cache_key] = now
+                return result
+            return self._cached_fee.get(cache_key, 1)
         except Exception:
-            return 1
+            return self._cached_fee.get(cache_key, 1)
 
     def isConnected(self) -> bool:
         try:
@@ -616,6 +653,11 @@ class ElectrumBackend(WalletBackend):
         status["version"] = self.getServerVersion()
         return status
 
+    def recentlyReconnected(self, grace_seconds: int = 30) -> bool:
+        if hasattr(self._server, "recently_reconnected"):
+            return self._server.recently_reconnected(grace_seconds)
+        return False
+
     def getAddressHistory(self, address: str) -> List[dict]:
         if self._isUnsupportedAddress(address):
             return []
@@ -751,5 +793,29 @@ class ElectrumBackend(WalletBackend):
             self._log.debug(f"Failed to subscribe to {address}: {e}")
             return None
 
+    def getSyncStatus(self) -> dict:
+        import time
+
+        height = 0
+        height_time = 0
+        if hasattr(self._server, "get_subscribed_height"):
+            height = self._server.get_subscribed_height()
+            height_time = getattr(self._server, "_subscribed_height_time", 0)
+
+        if self._cached_height > 0:
+            if self._cached_height > height:
+                height = self._cached_height
+            if self._cached_height_time > height_time:
+                height_time = self._cached_height_time
+
+        now = time.time()
+        stale_threshold = 300
+        is_synced = height > 0 and (now - height_time) < stale_threshold
+        return {
+            "height": height,
+            "synced": is_synced,
+            "last_update": height_time,
+        }
+
     def getServer(self):
         return self._server

basicswap/wallet_manager.py

@@ -37,7 +37,7 @@ class WalletManager:
         Coins.LTC: {"mainnet": "ltc", "testnet": "tltc", "regtest": "rltc"},
     }
 
-    GAP_LIMIT = 20
+    GAP_LIMIT = 50
 
     def __init__(self, swap_client, log):
         self._gap_limits: Dict[Coins, int] = {}
@@ -51,6 +51,12 @@ class WalletManager:
         self._migration_in_progress: set = set()
         self._balance_sync_lock = threading.Lock()
 
+    def getGapLimit(self, coin_type: Coins) -> int:
+        return self._gap_limits.get(coin_type, self.GAP_LIMIT)
+
+    def setGapLimit(self, coin_type: Coins, gap_limit: int) -> None:
+        self._gap_limits[coin_type] = gap_limit
+
     def initialize(self, coin_type: Coins, root_key) -> None:
         if coin_type not in self.SUPPORTED_COINS:
             raise ValueError(f"Coin {coin_type} not supported by WalletManager")

tests/basicswap/extended/test_dcr.py

@@ -1489,7 +1489,11 @@ class Test(BaseTest):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, fee_rate)
+        result = ci.publishBLockTx(v, S, amount, fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
         test_delay_event.wait(1)
 
         addr_out = ci.getNewAddress(True)

tests/basicswap/extended/test_doge.py

@@ -412,7 +412,11 @@ class Test(TestFunctions):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, fee_rate)
+        result = ci.publishBLockTx(v, S, amount, fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
         test_delay_event.wait(1)
 
         addr_out = ci.getNewAddress(False)

tests/basicswap/test_btc_xmr.py

@@ -1579,7 +1579,11 @@ class BasicSwapTest(TestFunctions):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, self.test_fee_rate)
+        result = ci.publishBLockTx(v, S, amount, self.test_fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
 
         addr_out = ci.getNewAddress(True)
         lock_tx_b_spend_txid = ci.spendBLockTx(

tests/basicswap/test_xmr.py

@@ -1218,7 +1218,11 @@ class Test(BaseTest):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, fee_rate)
+        result = ci.publishBLockTx(v, S, amount, fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
 
         addr_out = ci.getNewAddress(True)
         lock_tx_b_spend_txid = ci.spendBLockTx(
@@ -1247,7 +1251,11 @@ class Test(BaseTest):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, fee_rate)
+        result = ci.publishBLockTx(v, S, amount, fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
 
         addr_out = ci.getNewAddress(True)
         for i in range(20):
@@ -2306,7 +2314,11 @@ class Test(BaseTest):
         v = ci.getNewRandomKey()
         s = ci.getNewRandomKey()
         S = ci.getPubkey(s)
-        lock_tx_b_txid = ci.publishBLockTx(v, S, amount, fee_rate)
+        result = ci.publishBLockTx(v, S, amount, fee_rate)
+        if isinstance(result, tuple):
+            lock_tx_b_txid, lock_tx_b_vout = result
+        else:
+            lock_tx_b_txid = result
 
         addr_out = ci.getNewStealthAddress()
         lock_tx_b_spend_txid = None