.buildbot/appimage/build.sh

@@ -4,7 +4,11 @@ export APPIMAGE_EXTRACT_AND_RUN=1
 BUILDER=appimage-builder-x86_64.AppImage
 RECIPE=packages/AppImage/AppImageBuilder.yml
 
+git remote add -f upstream https://github.com/Bitmessage/PyBitmessage.git
+HEAD="$(git rev-parse HEAD)"
+UPSTREAM="$(git merge-base --fork-point upstream/v0.6)"
 export APP_VERSION=$(git describe --tags | cut -d- -f1,3 | tr -d v)
+[ $HEAD != $UPSTREAM ] && APP_VERSION="${APP_VERSION}-alpha"
 
 function set_sourceline {
     if [ ${ARCH} == amd64 ]; then

INSTALL.md

@@ -1,12 +1,43 @@
 # PyBitmessage Installation Instructions
 - Binary (64bit, no separate installation of dependencies required)
-    - Windows: https://download.bitmessage.org/snapshots/
+    - Windows: https://artifacts.bitmessage.at/winebuild/
     - Linux AppImages: https://artifacts.bitmessage.at/appimage/
     - Linux snaps: https://artifacts.bitmessage.at/snap/
     - Mac (not up to date): https://github.com/Bitmessage/PyBitmessage/releases/tag/v0.6.1
 - Source
     `git clone git://github.com/Bitmessage/PyBitmessage.git`
 
+## Notes on the AppImages
+
+The [AppImage](https://docs.appimage.org/introduction/index.html)
+is a bundle, built by the
+[appimage-builder](https://github.com/AppImageCrafters/appimage-builder) from
+the Ubuntu Bionic deb files, the sources and `bitmsghash.so`, precompiled for
+3 architectures, using the `packages/AppImage/AppImageBuilder.yml` recipe.
+
+When you run the appimage the bundle is loop mounted to a location like
+`/tmp/.mount_PyBitm97wj4K` with `squashfs-tools`.
+
+The appimage name has several informational filds:
+```
+PyBitmessage-<VERSION>-g<COMMITHASH>[-alpha]-<ARCH>.AppImage
+```
+
+E.g. `PyBitmessage-0.6.3.2-ge571ba8a-x86_64.AppImage` is an appimage, built from
+the `v0.6` for x86_64 and `PyBitmessage-0.6.3.2-g9de2aaf1-alpha-aarch64.AppImage`
+is one, built from some development branch for arm64.
+
+You can also build the appimage with local code. For that you need installed
+docker:
+
+```
+$ docker build -t bm-appimage -f .buildbot/appimage/Dockerfile .
+$ docker run -t --rm -v "$(pwd)"/dist:/out bm-appimage .buildbot/appimage/build.sh
+```
+
+The appimages should be in the dist dir.
+
+
 ## Helper Script for building from source
 Go to the directory with PyBitmessage source code and run:
 ```

src/bitmessagemain.py

@@ -12,6 +12,7 @@ The PyBitmessage startup script
 import os
 import sys
 
+
 try:
     import pathmagic
 except ImportError:
@@ -156,13 +157,6 @@ class Main(object):
 
         set_thread_name("PyBitmessage")
 
-        state.dandelion_enabled = config.safeGetInt('network', 'dandelion')
-        # dandelion requires outbound connections, without them,
-        # stem objects will get stuck forever
-        if state.dandelion_enabled and not config.safeGetBoolean(
-                'bitmessagesettings', 'sendoutgoingconnections'):
-            state.dandelion_enabled = 0
-
         if state.testmode or config.safeGetBoolean(
                 'bitmessagesettings', 'extralowdifficulty'):
             defaults.networkDefaultProofOfWorkNonceTrialsPerByte = int(

src/bitmessageqt/__init__.py

@@ -69,6 +69,9 @@ except ImportError:
     get_plugins = False
 
 
+is_windows = sys.platform.startswith('win')
+
+
 # TODO: rewrite
 def powQueueSize():
     """Returns the size of queues.workerQueue including current unfinished work"""
@@ -87,7 +90,7 @@ def openKeysFile():
     keysfile = os.path.join(state.appdata, 'keys.dat')
     if 'linux' in sys.platform:
         subprocess.call(["xdg-open", keysfile])
-    elif sys.platform.startswith('win'):
+    elif is_windows:
         os.startfile(keysfile)  # pylint: disable=no-member
 
 
@@ -885,7 +888,7 @@ class MyForm(settingsmixin.SMainWindow):
         """
         startonlogon = config.safeGetBoolean(
             'bitmessagesettings', 'startonlogon')
-        if sys.platform.startswith('win'):  # Auto-startup for Windows
+        if is_windows:  # Auto-startup for Windows
             RUN_PATH = "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Run"
             settings = QtCore.QSettings(
                 RUN_PATH, QtCore.QSettings.NativeFormat)
@@ -4328,6 +4331,14 @@ class BitmessageQtApplication(QtGui.QApplication):
     # Unique identifier for this application
     uuid = '6ec0149b-96e1-4be1-93ab-1465fb3ebf7c'
 
+    @staticmethod
+    def get_windowstyle():
+        """Get window style set in config or default"""
+        return config.safeGet(
+            'bitmessagesettings', 'windowstyle',
+            'Windows' if is_windows else 'GTK+'
+        )
+
     def __init__(self, *argv):
         super(BitmessageQtApplication, self).__init__(*argv)
         id = BitmessageQtApplication.uuid
@@ -4336,6 +4347,14 @@ class BitmessageQtApplication(QtGui.QApplication):
         QtCore.QCoreApplication.setOrganizationDomain("bitmessage.org")
         QtCore.QCoreApplication.setApplicationName("pybitmessageqt")
 
+        self.setStyle(self.get_windowstyle())
+
+        font = config.safeGet('bitmessagesettings', 'font')
+        if font:
+            # family, size, weight = font.split(',')
+            family, size = font.split(',')
+            self.setFont(QtGui.QFont(family, int(size)))
+
         self.server = None
         self.is_running = False
 

src/bitmessageqt/bitmessageui.py

@@ -61,7 +61,8 @@ class Ui_MainWindow(object):
         self.tabWidget.setMinimumSize(QtCore.QSize(0, 0))
         self.tabWidget.setBaseSize(QtCore.QSize(0, 0))
         font = QtGui.QFont()
-        font.setPointSize(9)
+        base_size = QtGui.QApplication.instance().font().pointSize()
+        font.setPointSize(int(base_size * 0.75))
         self.tabWidget.setFont(font)
         self.tabWidget.setTabPosition(QtGui.QTabWidget.North)
         self.tabWidget.setTabShape(QtGui.QTabWidget.Rounded)

src/bitmessageqt/settings.py

@@ -48,14 +48,17 @@ def getSOCKSProxyType(config):
 
 class SettingsDialog(QtGui.QDialog):
     """The "Settings" dialog"""
+    # pylint: disable=too-many-instance-attributes
     def __init__(self, parent=None, firstrun=False):
         super(SettingsDialog, self).__init__(parent)
         widgets.load('settings.ui', self)
 
+        self.app = QtGui.QApplication.instance()
         self.parent = parent
         self.firstrun = firstrun
         self.config = config_obj
         self.net_restart_needed = False
+        self.font_setting = None
         self.timer = QtCore.QTimer()
 
         if self.config.safeGetBoolean('bitmessagesettings', 'dontconnect'):
@@ -92,6 +95,15 @@ class SettingsDialog(QtGui.QDialog):
     def adjust_from_config(self, config):
         """Adjust all widgets state according to config settings"""
         # pylint: disable=too-many-branches,too-many-statements
+
+        current_style = self.app.get_windowstyle()
+        for i, sk in enumerate(QtGui.QStyleFactory.keys()):
+            self.comboBoxStyle.addItem(sk)
+            if sk == current_style:
+                self.comboBoxStyle.setCurrentIndex(i)
+
+        self.save_font_setting(self.app.font())
+
         if not self.parent.tray.isSystemTrayAvailable():
             self.groupBoxTray.setEnabled(False)
             self.groupBoxTray.setTitle(_translate(
@@ -144,7 +156,7 @@ class SettingsDialog(QtGui.QDialog):
                 "MainWindow",
                 "Tray notifications not yet supported on your OS."))
 
-        if 'win' not in sys.platform and not self.parent.desktop:
+        if not sys.platform.startswith('win') and not self.parent.desktop:
             self.checkBoxStartOnLogon.setDisabled(True)
             self.checkBoxStartOnLogon.setText(_translate(
                 "MainWindow", "Start-on-login not yet supported on your OS."))
@@ -329,6 +341,18 @@ class SettingsDialog(QtGui.QDialog):
         if status == 'success':
             self.parent.namecoin = nc
 
+    def save_font_setting(self, font):
+        """Save user font setting and set the buttonFont text"""
+        font_setting = (font.family(), font.pointSize())
+        self.buttonFont.setText('{} {}'.format(*font_setting))
+        self.font_setting = '{},{}'.format(*font_setting)
+
+    def choose_font(self):
+        """Show the font selection dialog"""
+        font, valid = QtGui.QFontDialog.getFont()
+        if valid:
+            self.save_font_setting(font)
+
     def accept(self):
         """A callback for accepted event of buttonBox (OK button pressed)"""
         # pylint: disable=too-many-branches,too-many-statements
@@ -355,6 +379,20 @@ class SettingsDialog(QtGui.QDialog):
         self.config.set('bitmessagesettings', 'replybelow', str(
             self.checkBoxReplyBelow.isChecked()))
 
+        window_style = str(self.comboBoxStyle.currentText())
+        if self.app.get_windowstyle() != window_style or self.config.safeGet(
+            'bitmessagesettings', 'font'
+        ) != self.font_setting:
+            self.config.set('bitmessagesettings', 'windowstyle', window_style)
+            self.config.set('bitmessagesettings', 'font', self.font_setting)
+            queues.UISignalQueue.put((
+                'updateStatusBar', (
+                    _translate(
+                        "MainWindow",
+                        "You need to restart the application to apply"
+                        " the window style or default font."), 1)
+            ))
+
         lang = str(self.languageComboBox.itemData(
             self.languageComboBox.currentIndex()))
         self.config.set('bitmessagesettings', 'userlocale', lang)

src/bitmessageqt/settings.ui

@@ -147,6 +147,32 @@
          </property>
         </widget>
        </item>
+       <item row="9" column="0">
+        <widget class="QGroupBox" name="groupBoxStyle">
+         <property name="title">
+          <string>Custom Style</string>
+         </property>
+         <layout class="QHBoxLayout">
+          <item>
+           <widget class="QComboBox" name="comboBoxStyle">
+            <property name="minimumSize">
+             <size>
+              <width>100</width>
+              <height>0</height>
+             </size>
+            </property>
+           </widget>
+          </item>
+	  <item>
+           <widget class="QPushButton" name="buttonFont">
+            <property name="text">
+             <string>Font</string>
+            </property>
+           </widget>
+          </item>
+	 </layout>
+        </widget>
+       </item>
        <item row="9" column="1">
         <widget class="QGroupBox" name="groupBox">
          <property name="title">
@@ -1202,5 +1228,11 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>buttonFont</sender>
+   <signal>clicked()</signal>
+   <receiver>settingsDialog</receiver>
+   <slot>choose_font</slot>
+  </connection>
  </connections>
 </ui>

src/bitmessageqt/tests/main.py

@@ -5,15 +5,20 @@ import sys
 import unittest
 
 from PyQt4 import QtCore, QtGui
+from six.moves import queue
 
 import bitmessageqt
-import queues
+from bitmessageqt import _translate, config, queues
-from tr import _translate
 
 
 class TestBase(unittest.TestCase):
     """Base class for bitmessageqt test case"""
 
+    @classmethod
+    def setUpClass(cls):
+        """Provide the UI test cases with common settings"""
+        cls.config = config
+
     def setUp(self):
         self.app = (
             QtGui.QApplication.instance()
@@ -24,14 +29,21 @@ class TestBase(unittest.TestCase):
             self.window.appIndicatorInit(self.app)
 
     def tearDown(self):
+        """Search for exceptions in closures called by timer and fail if any"""
         # self.app.deleteLater()
+        concerning = []
         while True:
             try:
                 thread, exc = queues.excQueue.get(block=False)
-            except Queue.Empty:
+            except queue.Empty:
-                return
+                break
             if thread == 'tests':
-                self.fail('Exception in the main thread: %s' % exc)
+                concerning.append(exc)
+        if concerning:
+            self.fail(
+                'Exceptions found in the main thread:\n%s' % '\n'.join((
+                    str(e) for e in concerning
+                )))
 
 
 class TestMain(unittest.TestCase):

src/bitmessageqt/tests/settings.py

@@ -1,10 +1,14 @@
+"""Tests for PyBitmessage settings"""
 import threading
 import time
 
-from .main import TestBase
+from PyQt4 import QtCore, QtGui, QtTest
+
 from bmconfigparser import config
 from bitmessageqt import settings
 
+from .main import TestBase
+
 
 class TestSettings(TestBase):
     """A test case for the "Settings" dialog"""
@@ -14,8 +18,7 @@ class TestSettings(TestBase):
 
     def test_udp(self):
         """Test the effect of checkBoxUDP"""
-        udp_setting = config.safeGetBoolean(
+        udp_setting = config.safeGetBoolean('bitmessagesettings', 'udp')
-            'bitmessagesettings', 'udp')
         self.assertEqual(udp_setting, self.dialog.checkBoxUDP.isChecked())
         self.dialog.checkBoxUDP.setChecked(not udp_setting)
         self.dialog.accept()
@@ -32,3 +35,44 @@ class TestSettings(TestBase):
         else:
             if not udp_setting:
                 self.fail('No Announcer thread found while udp set to True')
+
+    def test_styling(self):
+        """Test custom windows style and font"""
+        style_setting = config.safeGet('bitmessagesettings', 'windowstyle')
+        font_setting = config.safeGet('bitmessagesettings', 'font')
+        self.assertIs(style_setting, None)
+        self.assertIs(font_setting, None)
+        style_control = self.dialog.comboBoxStyle
+        self.assertEqual(
+            style_control.currentText(), self.app.get_windowstyle())
+
+        def call_font_dialog():
+            """A function to get the open font dialog and accept it"""
+            font_dialog = QtGui.QApplication.activeModalWidget()
+            self.assertTrue(isinstance(font_dialog, QtGui.QFontDialog))
+            selected_font = font_dialog.currentFont()
+            self.assertEqual(
+                config.safeGet('bitmessagesettings', 'font'), '{},{}'.format(
+                    selected_font.family(), selected_font.pointSize()))
+
+            font_dialog.accept()
+            self.dialog.accept()
+            self.assertEqual(
+                config.safeGet('bitmessagesettings', 'windowstyle'),
+                style_control.currentText())
+
+        def click_font_button():
+            """Use QtTest to click the button"""
+            QtTest.QTest.mouseClick(
+                self.dialog.buttonFont, QtCore.Qt.LeftButton)
+
+        style_count = style_control.count()
+        self.assertGreater(style_count, 1)
+        for i in range(style_count):
+            if i != style_control.currentIndex():
+                style_control.setCurrentIndex(i)
+                break
+
+        QtCore.QTimer.singleShot(30, click_font_button)
+        QtCore.QTimer.singleShot(60, call_font_dialog)
+        time.sleep(2)

src/network/__init__.py

@@ -1,9 +1,10 @@
 """
 Network subsystem package
 """
-
+from .dandelion import Dandelion
 from .threads import StoppableThread
 
+dandelion_ins = Dandelion()
 
 __all__ = ["StoppableThread"]
 
@@ -21,6 +22,11 @@ def start(config, state):
     from .receivequeuethread import ReceiveQueueThread
     from .uploadthread import UploadThread
 
+    # check and set dandelion enabled value at network startup
+    dandelion_ins.init_dandelion_enabled(config)
+    # pass pool instance into dandelion class instance
+    dandelion_ins.init_pool(connectionpool.pool)
+
     readKnownNodes()
     connectionpool.pool.connectToStream(1)
     for thread in (

src/network/addrthread.py

@@ -1,11 +1,11 @@
 """
 Announce addresses as they are received from other hosts
 """
+import random
 from six.moves import queue
 
 # magic imports!
 from network import connectionpool
-from helper_random import randomshuffle
 from protocol import assembleAddrMessage
 from queues import addrQueue  # FIXME: init with queue
 
@@ -29,9 +29,9 @@ class AddrThread(StoppableThread):
             if chunk:
                 # Choose peers randomly
                 connections = connectionpool.pool.establishedConnections()
-                randomshuffle(connections)
+                random.shuffle(connections)
                 for i in connections:
-                    randomshuffle(chunk)
+                    random.shuffle(chunk)
                     filtered = []
                     for stream, peer, seen, destination in chunk:
                         # peer's own address or address received from peer

src/network/asyncore_pollchoose.py

@@ -9,6 +9,7 @@ Basic infrastructure for asynchronous socket service clients and servers.
 import os
 import select
 import socket
+import random
 import sys
 import time
 import warnings
@@ -20,7 +21,6 @@ from errno import (
 from threading import current_thread
 from six.moves.reprlib import repr
 
-import helper_random
 
 try:
     from errno import WSAEWOULDBLOCK
@@ -234,13 +234,13 @@ def select_poller(timeout=0.0, map=None):
             if err.args[0] in (WSAENOTSOCK, ):
                 return
 
-        for fd in helper_random.randomsample(r, len(r)):
+        for fd in random.sample(r, len(r)):
             obj = map.get(fd)
             if obj is None:
                 continue
             read(obj)
 
-        for fd in helper_random.randomsample(w, len(w)):
+        for fd in random.sample(w, len(w)):
             obj = map.get(fd)
             if obj is None:
                 continue
@@ -298,7 +298,7 @@ def poll_poller(timeout=0.0, map=None):
         except socket.error as err:
             if err.args[0] in (EBADF, WSAENOTSOCK, EINTR):
                 return
-        for fd, flags in helper_random.randomsample(r, len(r)):
+        for fd, flags in random.sample(r, len(r)):
             obj = map.get(fd)
             if obj is None:
                 continue
@@ -358,7 +358,7 @@ def epoll_poller(timeout=0.0, map=None):
             if err.args[0] != EINTR:
                 raise
             r = []
-        for fd, flags in helper_random.randomsample(r, len(r)):
+        for fd, flags in random.sample(r, len(r)):
             obj = map.get(fd)
             if obj is None:
                 continue
@@ -421,7 +421,7 @@ def kqueue_poller(timeout=0.0, map=None):
 
         events = kqueue_poller.pollster.control(updates, selectables, timeout)
         if len(events) > 1:
-            events = helper_random.randomsample(events, len(events))
+            events = random.sample(events, len(events))
 
         for event in events:
             fd = event.ident

src/network/bmobject.py

@@ -7,7 +7,7 @@ import time
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
-from network import dandelion
+from network import dandelion_ins
 from highlevelcrypto import calculateInventoryHash
 
 logger = logging.getLogger('default')
@@ -113,7 +113,7 @@ class BMObject(object):  # pylint: disable=too-many-instance-attributes
         or advertise it unnecessarily)
         """
         # if it's a stem duplicate, pretend we don't have it
-        if dandelion.instance.hasHash(self.inventoryHash):
+        if dandelion_ins.hasHash(self.inventoryHash):
             return
         if self.inventoryHash in state.Inventory:
             raise BMObjectAlreadyHaveError()

src/network/bmproto.py

@@ -17,7 +17,6 @@ from network import knownnodes
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
-from network import dandelion
 from bmconfigparser import config
 from queues import invQueue, objectProcessorQueue, portCheckerQueue
 from randomtrackingdict import RandomTrackingDict
@@ -29,6 +28,7 @@ from network.bmobject import (
 )
 from network.proxy import ProxyError
 
+from network import dandelion_ins
 from .node import Node, Peer
 from .objectracker import ObjectTracker, missingObjects
 
@@ -364,14 +364,14 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             raise BMProtoExcessiveDataError()
 
         # ignore dinv if dandelion turned off
-        if extend_dandelion_stem and not state.dandelion_enabled:
+        if extend_dandelion_stem and not dandelion_ins.enabled:
             return True
 
         for i in items:
-            if i in state.Inventory and not dandelion.instance.hasHash(i):
+            if i in state.Inventory and not dandelion_ins.hasHash(i):
                 continue
-            if extend_dandelion_stem and not dandelion.instance.hasHash(i):
+            if extend_dandelion_stem and not dandelion_ins.hasHash(i):
-                dandelion.instance.addHash(i, self)
+                dandelion_ins.addHash(i, self)
             self.handleReceivedInventory(i)
 
         return True
@@ -437,9 +437,9 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             except KeyError:
                 pass
 
-        if self.object.inventoryHash in state.Inventory and dandelion.instance.hasHash(
+        if self.object.inventoryHash in state.Inventory and dandelion_ins.hasHash(
                 self.object.inventoryHash):
-            dandelion.instance.removeHash(
+            dandelion_ins.removeHash(
                 self.object.inventoryHash, "cycle detection")
 
         if six.PY2:
@@ -563,7 +563,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         if not self.isOutbound:
             self.append_write_buf(protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                network.connectionpool.pool.streams, True,
+                network.connectionpool.pool.streams, dandelion_ins.enabled, True,
                 nodeid=self.nodeid))
             logger.debug(
                 '%(host)s:%(port)i sending version',

src/network/connectionpool.py

@@ -7,9 +7,9 @@ import re
 import socket
 import sys
 import time
+import random
 
 from network import asyncore_pollchoose as asyncore
-import helper_random
 from network import knownnodes
 import protocol
 import state
@@ -216,7 +216,7 @@ class BMConnectionPool(object):
             connection_base = TCPConnection
         elif proxy_type == 'SOCKS5':
             connection_base = Socks5BMConnection
-            hostname = helper_random.randomchoice([
+            hostname = random.choice([  # nosec B311
                 'quzwelsuziwqgpt2.onion', None
             ])
         elif proxy_type == 'SOCKS4a':
@@ -228,7 +228,7 @@ class BMConnectionPool(object):
 
         bootstrapper = bootstrap(connection_base)
         if not hostname:
-            port = helper_random.randomchoice([8080, 8444])
+            port = random.choice([8080, 8444])  # nosec B311
             hostname = 'bootstrap%s.bitmessage.org' % port
         else:
             port = 8444
@@ -295,7 +295,7 @@ class BMConnectionPool(object):
                         state.maximumNumberOfHalfOpenConnections - pending):
                     try:
                         chosen = self.trustedPeer or chooseConnection(
-                            helper_random.randomchoice(self.streams))
+                            random.choice(self.streams))  # nosec B311
                     except ValueError:
                         continue
                     if chosen in self.outboundConnections:

src/network/dandelion.py

@@ -9,9 +9,6 @@ from time import time
 import six
 from binascii import hexlify
 
-import network.connectionpool  # use long name to address recursive import
-import state
-from queues import invQueue
 
 # randomise routes after 600 seconds
 REASSIGN_INTERVAL = 600
@@ -39,6 +36,8 @@ class Dandelion:  # pylint: disable=old-style-class
         # when to rerandomise routes
         self.refresh = time() + REASSIGN_INTERVAL
         self.lock = RLock()
+        self.enabled = None
+        self.pool = None
 
     @staticmethod
     def poissonTimeout(start=None, average=0):
@@ -49,10 +48,23 @@ class Dandelion:  # pylint: disable=old-style-class
             average = FLUFF_TRIGGER_MEAN_DELAY
         return start + expovariate(1.0 / average) + FLUFF_TRIGGER_FIXED_DELAY
 
+    def init_pool(self, pool):
+        """pass pool instance"""
+        self.pool = pool
+
+    def init_dandelion_enabled(self, config):
+        """Check if Dandelion is enabled and set value in enabled attribute"""
+        dandelion_enabled = config.safeGetInt('network', 'dandelion')
+        # dandelion requires outbound connections, without them,
+        # stem objects will get stuck forever
+        if not config.safeGetBoolean(
+                'bitmessagesettings', 'sendoutgoingconnections'):
+            dandelion_enabled = 0
+        self.enabled = dandelion_enabled
+
     def addHash(self, hashId, source=None, stream=1):
-        """Add inventory vector to dandelion stem"""
+        """Add inventory vector to dandelion stem return status of dandelion enabled"""
-        if not state.dandelion_enabled:
+        assert self.enabled is not None
-            return
         with self.lock:
             self.hashMap[bytes(hashId)] = Stem(
                 self.getNodeStem(source),
@@ -92,7 +104,7 @@ class Dandelion:  # pylint: disable=old-style-class
         """Child (i.e. next) node for an inventory vector during stem mode"""
         return self.hashMap[bytes(hashId)].child
 
-    def maybeAddStem(self, connection):
+    def maybeAddStem(self, connection, invQueue):
         """
         If we had too few outbound connections, add the current one to the
         current stem list. Dandelion as designed by the authors should
@@ -166,7 +178,7 @@ class Dandelion:  # pylint: disable=old-style-class
                 self.nodeMap[node] = self.pickStem(node)
                 return self.nodeMap[node]
 
-    def expire(self):
+    def expire(self, invQueue):
         """Switch expired objects from stem to fluff mode"""
         with self.lock:
             deadline = time()
@@ -182,19 +194,18 @@ class Dandelion:  # pylint: disable=old-style-class
 
     def reRandomiseStems(self):
         """Re-shuffle stem mapping (parent <-> child pairs)"""
+        assert self.pool is not None
+        if self.refresh > time():
+            return
+
         with self.lock:
             try:
                 # random two connections
                 self.stem = sample(
-                    sorted(network.connectionpool.BMConnectionPool(
+                    sorted(self.pool.outboundConnections.values()), MAX_STEMS)
-                    ).outboundConnections.values()), MAX_STEMS)
             # not enough stems available
             except ValueError:
-                self.stem = list(network.connectionpool.BMConnectionPool(
+                self.stem = list(self.pool.outboundConnections.values())
-                ).outboundConnections.values())
             self.nodeMap = {}
             # hashMap stays to cater for pending stems
         self.refresh = time() + REASSIGN_INTERVAL
-
-
-instance = Dandelion()

src/network/downloadthread.py

@@ -2,15 +2,15 @@
 `DownloadThread` class definition
 """
 import time
+import random
 import state
 import six
 import addresses
-import helper_random
 import protocol
 from network import connectionpool
+from network import dandelion_ins
 from .objectracker import missingObjects
 from .threads import StoppableThread
-from network import dandelion
 
 
 class DownloadThread(StoppableThread):
@@ -44,7 +44,7 @@ class DownloadThread(StoppableThread):
             requested = 0
             # Choose downloading peers randomly
             connections = connectionpool.pool.establishedConnections()
-            helper_random.randomshuffle(connections)
+            random.shuffle(connections)
             requestChunk = max(int(
                 min(self.maxRequestChunk, len(missingObjects))
                 / len(connections)), 1) if connections else 1
@@ -61,7 +61,7 @@ class DownloadThread(StoppableThread):
                 payload = bytearray()
                 chunkCount = 0
                 for chunk in request:
-                    if chunk in state.Inventory and not dandelion.instance.hasHash(chunk):
+                    if chunk in state.Inventory and not dandelion_ins.hasHash(chunk):
                         try:
                             del i.objectsNewToMe[chunk]
                         except KeyError:

src/network/invthread.py

@@ -9,7 +9,7 @@ import addresses
 import protocol
 import state
 from network import connectionpool
-from network import dandelion
+from network import dandelion_ins
 from queues import invQueue
 from .threads import StoppableThread
 
@@ -40,10 +40,10 @@ class InvThread(StoppableThread):
     @staticmethod
     def handleLocallyGenerated(stream, hashId):
         """Locally generated inventory items require special handling"""
-        dandelion.instance.addHash(hashId, stream=stream)
+        dandelion_ins.addHash(hashId, stream=stream)
         for connection in connectionpool.pool.connections():
-            if state.dandelion_enabled and connection != \
+            if dandelion_ins.enabled and connection != \
-                    dandelion.instance.objectChildStem(hashId):
+                    dandelion_ins.objectChildStem(hashId):
                 continue
             connection.objectsNewToThem[hashId] = time()
 
@@ -52,7 +52,7 @@ class InvThread(StoppableThread):
             chunk = []
             while True:
                 # Dandelion fluff trigger by expiration
-                handleExpiredDandelion(dandelion.instance.expire())
+                handleExpiredDandelion(dandelion_ins.expire(invQueue))
                 try:
                     data = invQueue.get(False)
                     chunk.append((data[0], data[1]))
@@ -75,10 +75,10 @@ class InvThread(StoppableThread):
                         except KeyError:
                             continue
                         try:
-                            if connection == dandelion.instance.objectChildStem(inv[1]):
+                            if connection == dandelion_ins.objectChildStem(inv[1]):
                                 # Fluff trigger by RNG
                                 # auto-ignore if config set to 0, i.e. dandelion is off
-                                if random.randint(1, 100) >= state.dandelion_enabled:  # nosec B311
+                                if random.randint(1, 100) >= dandelion_ins.enabled:  # nosec B311
                                     fluffs.append(inv[1])
                                 # send a dinv only if the stem node supports dandelion
                                 elif connection.services & protocol.NODE_DANDELION > 0:
@@ -105,7 +105,6 @@ class InvThread(StoppableThread):
             for _ in range(len(chunk)):
                 invQueue.task_done()
 
-            if dandelion.instance.refresh < time():
+            dandelion_ins.reRandomiseStems()
-                dandelion.instance.reRandomiseStems()
 
             self.stop.wait(1)

src/network/objectracker.py

@@ -6,7 +6,7 @@ from threading import RLock
 import six
 
 import network.connectionpool  # use long name to address recursive import
-from network import dandelion
+from network import dandelion_ins
 from randomtrackingdict import RandomTrackingDict
 
 haveBloom = False
@@ -111,14 +111,14 @@ class ObjectTracker(object):
                 del i.objectsNewToMe[hashid]
             except KeyError:
                 if streamNumber in i.streams and (
-                        not dandelion.instance.hasHash(hashid)
+                        not dandelion_ins.hasHash(hashid)
-                        or dandelion.instance.objectChildStem(hashid) == i):
+                        or dandelion_ins.objectChildStem(hashid) == i):
                     with i.objectsNewToThemLock:
                         i.objectsNewToThem[hashid_bytes] = time.time()
                     # update stream number,
                     # which we didn't have when we just received the dinv
                     # also resets expiration of the stem mode
-                    dandelion.instance.setHashStream(hashid, streamNumber)
+                    dandelion_ins.setHashStream(hashid, streamNumber)
 
             if i == self:
                 try:

src/network/tcp.py

@@ -12,14 +12,13 @@ import six
 
 # magic imports!
 import addresses
-import helper_random
 import l10n
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
-from network import dandelion
 from bmconfigparser import config
 from highlevelcrypto import randomBytes
+from network import dandelion_ins
 from queues import invQueue, receiveDataQueue, UISignalQueue
 from tr import _translate
 
@@ -176,7 +175,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             knownnodes.increaseRating(self.destination)
             knownnodes.addKnownNode(
                 self.streams, self.destination, time.time())
-            dandelion.instance.maybeAddStem(self)
+            dandelion_ins.maybeAddStem(self, invQueue)
         self.sendAddr()
         self.sendBigInv()
 
@@ -208,7 +207,7 @@ class TCPConnection(BMProto, TLSDispatcher):
                     elemCount = min(
                         len(filtered),
                         maxAddrCount / 2 if n else maxAddrCount)
-                    addrs[s] = helper_random.randomsample(filtered, elemCount)
+                    addrs[s] = random.sample(filtered, elemCount)
         for substream in addrs:
             for peer, params in addrs[substream]:
                 templist.append((substream, peer, params["lastseen"]))
@@ -238,7 +237,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             with self.objectsNewToThemLock:
                 for objHash in state.Inventory.unexpired_hashes_by_stream(stream):
                     # don't advertise stem objects on bigInv
-                    if dandelion.instance.hasHash(objHash):
+                    if dandelion_ins.hasHash(objHash):
                         continue
                     bigInvList[objHash] = 0
         objectCount = 0
@@ -275,7 +274,7 @@ class TCPConnection(BMProto, TLSDispatcher):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                network.connectionpool.pool.streams,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.connectedAt = time.time()
         receiveDataQueue.put(self.destination)
@@ -300,7 +299,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             if host_is_global:
                 knownnodes.addKnownNode(
                     self.streams, self.destination, time.time())
-                dandelion.instance.maybeRemoveStem(self)
+                dandelion_ins.maybeRemoveStem(self)
         else:
             self.checkTimeOffsetNotification()
             if host_is_global:
@@ -326,7 +325,7 @@ class Socks5BMConnection(Socks5Connection, TCPConnection):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                network.connectionpool.pool.streams,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.set_state("bm_header", expectBytes=protocol.Header.size)
         return True
@@ -350,7 +349,7 @@ class Socks4aBMConnection(Socks4aConnection, TCPConnection):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                network.connectionpool.pool.streams,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.set_state("bm_header", expectBytes=protocol.Header.size)
         return True

src/network/uploadthread.py

@@ -3,12 +3,12 @@
 """
 import time
 
-import helper_random
+import random
 import protocol
 import state
 from network import connectionpool
-from network import dandelion
 from randomtrackingdict import RandomTrackingDict
+from network import dandelion_ins
 from .threads import StoppableThread
 
 
@@ -24,7 +24,7 @@ class UploadThread(StoppableThread):
             uploaded = 0
             # Choose uploading peers randomly
             connections = connectionpool.pool.establishedConnections()
-            helper_random.randomshuffle(connections)
+            random.shuffle(connections)
             for i in connections:
                 now = time.time()
                 # avoid unnecessary delay
@@ -41,8 +41,8 @@ class UploadThread(StoppableThread):
                 chunk_count = 0
                 for chunk in request:
                     del i.pendingUpload[chunk]
-                    if dandelion.instance.hasHash(chunk) and \
+                    if dandelion_ins.hasHash(chunk) and \
-                       i != dandelion.instance.objectChildStem(chunk):
+                       i != dandelion_ins.objectChildStem(chunk):
                         i.antiIntersectionDelay()
                         self.logger.info(
                             '%s asked for a stem object we didn\'t offer to it.',

src/protocol.py

@@ -339,8 +339,8 @@ def assembleAddrMessage(peerList):
     return retval
 
 
-def assembleVersionMessage(
+def assembleVersionMessage(  # pylint: disable=too-many-arguments
-    remoteHost, remotePort, participatingStreams, server=False, nodeid=None
+    remoteHost, remotePort, participatingStreams, dandelion_enabled=True, server=False, nodeid=None,
 ):
     """
     Construct the payload of a version message,
@@ -353,7 +353,7 @@ def assembleVersionMessage(
         '>q',
         NODE_NETWORK
         | (NODE_SSL if haveSSL(server) else 0)
-        | (NODE_DANDELION if state.dandelion_enabled else 0)
+        | (NODE_DANDELION if dandelion_enabled else 0)
     )
     payload += pack('>q', int(time.time()))
 
@@ -377,7 +377,7 @@ def assembleVersionMessage(
         '>q',
         NODE_NETWORK
         | (NODE_SSL if haveSSL(server) else 0)
-        | (NODE_DANDELION if state.dandelion_enabled else 0)
+        | (NODE_DANDELION if dandelion_enabled else 0)
     )
     # = 127.0.0.1. This will be ignored by the remote host.
     # The actual remote connected IP will be used.

src/state.py

@@ -43,8 +43,6 @@ ownAddresses = {}
 
 discoveredPeers = {}
 
-dandelion_enabled = 0
-
 kivy = False
 
 kivyapp = None

src/tests/core.py

@@ -322,16 +322,17 @@ class TestCore(unittest.TestCase):
 
     def test_version(self):
         """check encoding/decoding of the version message"""
+        dandelion_enabled = True
         # with single stream
-        msg = protocol.assembleVersionMessage('127.0.0.1', 8444, [1])
+        msg = protocol.assembleVersionMessage('127.0.0.1', 8444, [1], dandelion_enabled)
         decoded = self._decode_msg(msg, "IQQiiQlsLv")
         peer, _, ua, streams = self._decode_msg(msg, "IQQiiQlsLv")[4:]
         self.assertEqual(
-            peer, Node(11 if state.dandelion_enabled else 3, '127.0.0.1', 8444))
+            peer, Node(11 if dandelion_enabled else 3, '127.0.0.1', 8444))
         self.assertEqual(ua, '/PyBitmessage:' + softwareVersion + '/')
         self.assertEqual(streams, [1])
         # with multiple streams
-        msg = protocol.assembleVersionMessage('127.0.0.1', 8444, [1, 2, 3])
+        msg = protocol.assembleVersionMessage('127.0.0.1', 8444, [1, 2, 3], dandelion_enabled)
         decoded = self._decode_msg(msg, "IQQiiQlslv")
         peer, _, ua = decoded[4:7]
         streams = decoded[7:]

src/tests/test_addressgenerator.py

@@ -2,8 +2,8 @@
 
 from binascii import unhexlify
 
-from six.moves import queue
 import six
+from six.moves import queue
 
 from .partial import TestPartialRun
 from .samples import (

src/tests/test_api.py

@@ -5,12 +5,11 @@ Tests using API.
 import base64
 import json
 import time
-
 from binascii import hexlify
-from six.moves import xmlrpc_client  # nosec
-import six
 
 import psutil
+import six
+from six.moves import xmlrpc_client  # nosec
 
 from .samples import (
     sample_deterministic_addr3, sample_deterministic_addr4, sample_seed,
@@ -181,29 +180,29 @@ class TestAPI(TestAPIProto):
         self.assertEqual(
             self.api.getDeterministicAddress(self._seed, 3, 1),
             sample_deterministic_addr3)
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.getDeterministicAddress(self._seed, 2, 1),
+            self, self.api.getDeterministicAddress(self._seed, 2, 1),
             r'^API Error 0002:')
 
         # This is here until the streams will be implemented
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.getDeterministicAddress(self._seed, 3, 2),
+            self, self.api.getDeterministicAddress(self._seed, 3, 2),
             r'API Error 0003:')
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.createDeterministicAddresses(self._seed, 1, 4, 2),
+            self, self.api.createDeterministicAddresses(self._seed, 1, 4, 2),
             r'API Error 0003:')
 
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.createDeterministicAddresses('', 1),
+            self, self.api.createDeterministicAddresses('', 1),
             r'API Error 0001:')
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.createDeterministicAddresses(self._seed, 1, 2),
+            self, self.api.createDeterministicAddresses(self._seed, 1, 2),
             r'API Error 0002:')
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.createDeterministicAddresses(self._seed, 0),
+            self, self.api.createDeterministicAddresses(self._seed, 0),
             r'API Error 0004:')
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.createDeterministicAddresses(self._seed, 1000),
+            self, self.api.createDeterministicAddresses(self._seed, 1000),
             r'API Error 0005:')
 
         addresses = json.loads(
@@ -442,7 +441,7 @@ class TestAPI(TestAPIProto):
             self.assertEqual(self.api.joinChan(self._seed, addr), 'success')
             self.assertEqual(self.api.leaveChan(addr), 'success')
         # Joining with wrong address should fail
-        six.assertRegex(self,
+        six.assertRegex(
-            self.api.joinChan(self._seed, 'BM-2cWzSnwjJ7yRP3nLEW'),
+            self, self.api.joinChan(self._seed, 'BM-2cWzSnwjJ7yRP3nLEW'),
             r'^API Error 0008:'
         )

src/tests/test_inventory.py

@@ -6,6 +6,7 @@ import struct
 import tempfile
 import time
 import unittest
+
 import six
 
 from pybitmessage import highlevelcrypto
@@ -51,8 +52,8 @@ class TestStorageAbstract(unittest.TestCase):
 
     def test_inventory_storage(self):
         """Check inherited abstract methods"""
-        with six.assertRaisesRegex(self,
+        with six.assertRaisesRegex(
-            TypeError, "^Can't instantiate abstract class.*"
+            self, TypeError, "^Can't instantiate abstract class.*"
             "methods __contains__, __delitem__, __getitem__, __iter__,"
             " __len__, __setitem__"
         ):  # pylint: disable=abstract-class-instantiated

src/tests/test_logger.py

@@ -4,6 +4,7 @@ Testing the logger configuration
 
 import os
 import tempfile
+
 import six
 
 from .test_process import TestProcessProto