Simplify services (watchtower, payserver):

- Do not expose services settings in GUI
 - Use a single netaddress configuration variable.

electrum/daemon.py

@@ -142,8 +142,9 @@ def get_rpc_credentials(config: SimpleConfig) -> Tuple[str, str]:
 
 class WatchTowerServer(Logger):
 
-    def __init__(self, network):
+    def __init__(self, network, netaddress):
         Logger.__init__(self)
+        self.addr = netaddress
         self.config = network.config
         self.network = network
         self.lnwatcher = network.local_watchtower
@@ -163,11 +164,9 @@ class WatchTowerServer(Logger):
             return web.Response()
 
     async def run(self):
-        host = self.config.get('watchtower_host')
-        port = self.config.get('watchtower_port', 12345)
         self.runner = web.AppRunner(self.app)
         await self.runner.setup()
-        site = web.TCPSite(self.runner, host, port, ssl_context=self.config.get_ssl_context())
+        site = web.TCPSite(self.runner, host=str(self.addr.host), port=self.addr.port, ssl_context=self.config.get_ssl_context())
         await site.start()
 
     async def get_ctn(self, *args):
@@ -179,8 +178,9 @@ class WatchTowerServer(Logger):
 
 class PayServer(Logger):
 
-    def __init__(self, daemon: 'Daemon'):
+    def __init__(self, daemon: 'Daemon', netaddress):
         Logger.__init__(self)
+        self.addr = netaddress
         self.daemon = daemon
         self.config = daemon.config
         self.pending = defaultdict(asyncio.Event)
@@ -198,8 +198,6 @@ class PayServer(Logger):
     @ignore_exceptions
     @log_exceptions
     async def run(self):
-        host = self.config.get('payserver_host', 'localhost')
-        port = self.config.get('payserver_port')
         root = self.config.get('payserver_root', '/r')
         app = web.Application()
         app.add_routes([web.post('/api/create_invoice', self.create_request)])
@@ -209,7 +207,7 @@ class PayServer(Logger):
         app.add_routes([web.static(root, os.path.join(os.path.dirname(__file__), 'www'))])
         runner = web.AppRunner(app)
         await runner.setup()
-        site = web.TCPSite(runner, port=port, host=host, ssl_context=self.config.get_ssl_context())
+        site = web.TCPSite(runner, host=str(self.addr.host), port=self.addr.port, ssl_context=self.config.get_ssl_context())
         await site.start()
 
     async def create_request(self, request):
@@ -306,13 +304,15 @@ class Daemon(Logger):
             daemon_jobs.append(self.start_jsonrpc(config, fd))
         # request server
         self.pay_server = None
-        if not config.get('offline') and self.config.get('run_payserver'):
+        payserver_address = self.config.get_netaddress('payserver_address')
-            self.pay_server = PayServer(self)
+        if not config.get('offline') and payserver_address:
+            self.pay_server = PayServer(self, payserver_address)
             daemon_jobs.append(self.pay_server.run())
         # server-side watchtower
         self.watchtower = None
-        if not config.get('offline') and self.config.get('run_watchtower'):
+        watchtower_address = self.config.get_netaddress('watchtower_address')
-            self.watchtower = WatchTowerServer(self.network)
+        if not config.get('offline') and watchtower_address:
+            self.watchtower = WatchTowerServer(self.network, watchtower_address)
             daemon_jobs.append(self.watchtower.run)
         if self.network:
             self.network.start(jobs=[self.fx.run])

electrum/gui/qt/settings_dialog.py

@@ -62,7 +62,6 @@ class SettingsDialog(WindowModalDialog):
         fee_widgets = []
         tx_widgets = []
         oa_widgets = []
-        services_widgets = []
 
         # language
         lang_help = _('Select which language is used in the GUI (after restart).')
@@ -146,10 +145,19 @@ class SettingsDialog(WindowModalDialog):
         # lightning
         lightning_widgets = []
 
-        help_persist = _("""If this option is checked, Electrum will persist as a daemon after
+        help_local_wt = _("""If this option is checked, Electrum will
-you close all your wallet windows. Your local watchtower will keep
+run a local watchtower to watch your channels if your wallet is not
-running, and it will protect your channels even if your wallet is not
 open. For this to work, your computer needs to be online regularly.""")
+        local_wt_cb = QCheckBox(_("Run a local watchtower"))
+        local_wt_cb.setToolTip(help_local_wt)
+        local_wt_cb.setChecked(bool(self.config.get('run_local_watchtower', False)))
+        def on_local_wt_checked(x):
+            self.config.set_key('run_local_watchtower', bool(x))
+        local_wt_cb.stateChanged.connect(on_local_wt_checked)
+        lightning_widgets.append((local_wt_cb, None))
+
+        help_persist = _("""If this option is checked, Electrum will persist as a daemon after
+you close all your wallet windows. Use this to keep your local watchtower running""")
         persist_cb = QCheckBox(_("Run as daemon after the GUI is closed"))
         persist_cb.setToolTip(help_persist)
         persist_cb.setChecked(bool(self.config.get('persist_daemon', False)))
@@ -186,60 +194,6 @@ open. For this to work, your computer needs to be online regularly.""")
         self.alias_e.editingFinished.connect(self.on_alias_edit)
         oa_widgets.append((alias_label, self.alias_e))
 
-        # Services
-        ssl_cert = self.config.get('ssl_certfile')
-        ssl_cert_label = HelpLabel(_('SSL cert file') + ':', 'certificate file, with intermediate certificates if needed')
-        self.ssl_cert_e = QPushButton(ssl_cert)
-        self.ssl_cert_e.clicked.connect(self.select_ssl_certfile)
-        services_widgets.append((ssl_cert_label, self.ssl_cert_e))
-
-        ssl_privkey = self.config.get('ssl_keyfile')
-        ssl_privkey_label = HelpLabel(_('SSL key file') + ':', '')
-        self.ssl_privkey_e = QPushButton(ssl_privkey)
-        self.ssl_privkey_e.clicked.connect(self.select_ssl_privkey)
-        services_widgets.append((ssl_privkey_label, self.ssl_privkey_e))
-
-        ssl_domain_label = HelpLabel(_('SSL domain') + ':', '')
-        self.ssl_domain_e = QLineEdit('')
-        self.ssl_domain_e.setReadOnly(True)
-        services_widgets.append((ssl_domain_label, self.ssl_domain_e))
-
-        self.check_ssl_config()
-
-        hostname = self.config.get('services_hostname', 'localhost')
-        hostname_label = HelpLabel(_('Hostname') + ':', 'must match your SSL domain')
-        self.hostname_e = QLineEdit(hostname)
-        self.hostname_e.editingFinished.connect(self.on_hostname)
-        services_widgets.append((hostname_label, self.hostname_e))
-
-        payserver_cb = QCheckBox(_("Run PayServer"))
-        payserver_cb.setToolTip("Configure a port")
-        payserver_cb.setChecked(bool(self.config.get('run_payserver', False)))
-        def on_payserver_checked(x):
-            self.config.set_key('run_payserver', bool(x))
-            self.payserver_port_e.setEnabled(bool(x))
-        payserver_cb.stateChanged.connect(on_payserver_checked)
-        payserver_port = self.config.get('payserver_port', 8002)
-        self.payserver_port_e = QLineEdit(str(payserver_port))
-        self.payserver_port_e.editingFinished.connect(self.on_payserver_port)
-        self.payserver_port_e.setEnabled(self.config.get('run_payserver', False))
-        services_widgets.append((payserver_cb, self.payserver_port_e))
-
-        help_local_wt = _("""To run a watchtower, you must run Electrum on a machine
-that is always connected to the internet. Configure a port if you want it to be public.""")
-        local_wt_cb = QCheckBox(_("Run Watchtower"))
-        local_wt_cb.setToolTip(help_local_wt)
-        local_wt_cb.setChecked(bool(self.config.get('run_watchtower', False)))
-        def on_local_wt_checked(x):
-            self.config.set_key('run_watchtower', bool(x))
-            self.local_wt_port_e.setEnabled(bool(x))
-        local_wt_cb.stateChanged.connect(on_local_wt_checked)
-        watchtower_port = self.config.get('watchtower_port', '')
-        self.local_wt_port_e = QLineEdit(str(watchtower_port))
-        self.local_wt_port_e.setEnabled(self.config.get('run_watchtower', False))
-        self.local_wt_port_e.editingFinished.connect(self.on_watchtower_port)
-        services_widgets.append((local_wt_cb, self.local_wt_port_e))
-
         # units
         units = base_units_list
         msg = (_('Base unit of your wallet.')
@@ -506,7 +460,6 @@ that is always connected to the internet. Configure a port if you want it to be
             (tx_widgets, _('Transactions')),
             (lightning_widgets, _('Lightning')),
             (fiat_widgets, _('Fiat')),
-            (services_widgets, _('Services')),
             (oa_widgets, _('OpenAlias')),
         ]
         for widgets, name in tabs_info:
@@ -546,60 +499,3 @@ that is always connected to the internet. Configure a port if you want it to be
         self.config.set_key('alias', alias, True)
         if alias:
             self.window.fetch_alias()
-
-    def select_ssl_certfile(self, b):
-        name = self.config.get('ssl_certfile', '')
-        filename, __ = QFileDialog.getOpenFileName(self, "Select your SSL certificate file", name)
-        if filename:
-            self.config.set_key('ssl_certfile', filename)
-            self.ssl_cert_e.setText(filename)
-            self.check_ssl_config()
-
-    def select_ssl_privkey(self, b):
-        name = self.config.get('ssl_keyfile', '')
-        filename, __ = QFileDialog.getOpenFileName(self, "Select your SSL private key file", name)
-        if filename:
-            self.config.set_key('ssl_keyfile', filename)
-            self.ssl_cert_e.setText(filename)
-            self.check_ssl_config()
-
-    def check_ssl_config(self):
-        try:
-            SSL_identity = self.config.get_ssl_domain()
-            SSL_error = None
-        except BaseException as e:
-            SSL_identity = "error"
-            SSL_error = repr(e)
-        self.ssl_domain_e.setText(SSL_identity or "")
-        s = (ColorScheme.RED if SSL_error else ColorScheme.GREEN).as_stylesheet(True) if SSL_identity else ''
-        self.ssl_domain_e.setStyleSheet(s)
-        if SSL_error:
-            self.ssl_domain_e.setText(SSL_error)
-
-    def on_hostname(self):
-        hostname = str(self.hostname_e.text())
-        self.config.set_key('services_hostname', hostname, True)
-
-    def _get_int_port_from_port_text(self, port_text) -> Optional[int]:
-        if not port_text:
-            return
-        try:
-            port = int(port_text)
-            if not (0 < port < 2 ** 16):
-                raise Exception('port out of range')
-        except Exception:
-            self.window.show_error("invalid port")
-            return
-        return port
-
-    def on_payserver_port(self):
-        port_text = self.payserver_port_e.text()
-        port = self._get_int_port_from_port_text(port_text)
-        if port is None: return
-        self.config.set_key('payserver_port', port, True)
-
-    def on_watchtower_port(self):
-        port_text = self.payserver_port_e.text()
-        port = self._get_int_port_from_port_text(port_text)
-        if port is None: return
-        self.config.set_key('watchtower_port', port, True)

electrum/network.py

@@ -328,7 +328,7 @@ class Network(Logger, NetworkRetryManager[ServerAddr]):
         self.channel_db = None  # type: Optional[ChannelDB]
         self.lngossip = None  # type: Optional[LNGossip]
         self.local_watchtower = None  # type: Optional[WatchTower]
-        if self.config.get('run_watchtower', False):
+        if self.config.get('run_local_watchtower', False):
             from . import lnwatcher
             self.local_watchtower = lnwatcher.WatchTower(self)
             self.local_watchtower.start_network(self)

electrum/simple_config.py

@@ -9,6 +9,7 @@ from typing import Union, Optional
 from numbers import Real
 
 from copy import deepcopy
+from aiorpcx import NetAddress
 
 from . import util
 from . import constants
@@ -592,6 +593,15 @@ class SimpleConfig(Logger):
             SSL_identity = None
         return SSL_identity
 
+    def get_netaddress(self, key: str) -> Optional[NetAddress]:
+        text = self.get(key)
+        if text:
+            try:
+                host, port = text.split(':')
+                return NetAddress(host, port)
+            except:
+                pass
+
 
 def read_user_config(path):
     """Parse and store the user config settings in electrum.conf into user_config[]."""

electrum/tests/regtest/regtest.sh

@@ -317,10 +317,9 @@ fi
 
 if [[ $1 == "configure_test_watchtower" ]]; then
     # carol is the watchtower of bob
-    $carol setconfig --offline run_watchtower true
+    $carol setconfig -o run_local_watchtower true
-    $carol setconfig --offline watchtower_host 127.0.0.1
+    $carol setconfig -o watchtower_address 127.0.0.1:12345
-    $carol setconfig --offline watchtower_port 12345
+    $bob setconfig -o watchtower_url http://127.0.0.1:12345
-    $bob setconfig --offline watchtower_url http://127.0.0.1:12345
 fi
 
 if [[ $1 == "watchtower" ]]; then

electrum/wallet.py

@@ -1605,13 +1605,12 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         else:
             return
         # add URL if we are running a payserver
-        if self.config.get('run_payserver'):
+        payserver = self.config.get_netaddress('payserver_address')
-            host = self.config.get('payserver_host', 'localhost')
+        if payserver:
-            port = self.config.get('payserver_port', 8002)
             root = self.config.get('payserver_root', '/r')
             use_ssl = bool(self.config.get('ssl_keyfile'))
             protocol = 'https' if use_ssl else 'http'
-            base = '%s://%s:%d'%(protocol, host, port)
+            base = '%s://%s:%d'%(protocol, payserver.host, payserver.port)
             req['view_url'] = base + root + '/pay?id=' + key
             if use_ssl and 'URI' in req:
                 request_url = base + '/bip70/' + key + '.bip70'