diff --git a/.arclint b/.arclint
index cd1f5399f..88c076ffd 100644
--- a/.arclint
+++ b/.arclint
@@ -1,303 +1,304 @@
 {
     "linters": {
         "generated": {
             "type": "generated"
         },
         "clang-format": {
             "type": "clang-format",
             "version": ">=8.0",
             "bin": ["clang-format-8", "clang-format"],
             "include": "(^src/.*\\.(h|c|cpp|mm)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "autopep8": {
             "type": "autopep8",
             "version": ">=1.3.4",
             "include": "(\\.py$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ],
             "flags": [
                 "--aggressive",
                 "--ignore=W503,W504"
             ]
         },
         "flake8": {
             "type": "flake8",
             "version": ">=3.0",
             "include": "(\\.py$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ],
             "flags": [
                 "--ignore=E501,E704,W503,W504"
             ]
         },
         "lint-format-strings": {
             "type": "lint-format-strings",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)",
                 "(^src/test/fuzz/strprintf.cpp$)"
             ]
         },
         "check-doc": {
             "type": "check-doc",
             "include": "(^src/.*\\.(h|c|cpp)$)"
         },
         "lint-tests": {
             "type": "lint-tests",
             "include": "(^src/(seeder/|rpc/|wallet/)?test/.*\\.(cpp)$)"
         },
         "lint-python-format": {
             "type": "lint-python-format",
             "include": "(\\.py$)",
             "exclude": [
                 "(^test/lint/lint-python-format\\.py$)",
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ]
         },
         "phpcs": {
             "type": "phpcs",
             "include": "(\\.php$)",
             "exclude": [
                 "(^arcanist/__phutil_library_.+\\.php$)"
             ],
             "phpcs.standard": "arcanist/phpcs.xml"
         },
         "lint-locale-dependence": {
             "type": "lint-locale-dependence",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes/|leveldb/|secp256k1/|tinyformat.h|univalue/))",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-cheader": {
             "type": "lint-cheader",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "spelling": {
             "type": "spelling",
             "exclude": [
                 "(^build-aux/m4/)",
                 "(^depends/)",
                 "(^doc/release-notes/)",
                 "(^contrib/gitian-builder/)",
                 "(^src/(qt/locale|secp256k1|univalue|leveldb)/)",
                 "(^test/lint/dictionary/)"
             ],
             "spelling.dictionaries": [
                 "test/lint/dictionary/english.json"
             ]
         },
         "lint-assert-with-side-effects": {
             "type": "lint-assert-with-side-effects",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-include-quotes": {
             "type": "lint-include-quotes",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-include-guard": {
             "type": "lint-include-guard",
             "include": "(^src/.*\\.h$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)",
                 "(^src/tinyformat.h$)"
             ]
         },
         "lint-include-source": {
             "type": "lint-include-source",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-stdint": {
             "type": "lint-stdint",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)",
                 "(^src/compat/assumptions.h$)"
             ]
         },
         "lint-source-filename": {
             "type": "lint-source-filename",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-boost-dependencies": {
             "type": "lint-boost-dependencies",
             "include": "(^src/.*\\.(h|cpp)$)"
         },
         "check-rpc-mappings": {
             "type": "check-rpc-mappings",
             "include": "(^src/(rpc/|wallet/rpc).*\\.cpp$)"
         },
         "lint-python-encoding": {
             "type": "lint-python-encoding",
             "include": "(\\.py$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ]
         },
         "lint-python-shebang": {
             "type": "lint-python-shebang",
             "include": "(\\.py$)",
             "exclude": [
                 "(__init__\\.py$)",
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ]
         },
         "lint-bash-shebang": {
             "type": "lint-bash-shebang",
             "include": "(\\.sh$)",
             "exclude": [
                 "(^contrib/gitian-builder/)"
             ]
         },
         "shellcheck": {
             "type": "shellcheck",
             "version": ">=0.7.0",
             "flags": [
                 "--external-sources",
                 "--source-path=SCRIPTDIR"
             ],
             "include": "(\\.sh$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^src/(secp256k1|univalue)/)"
             ]
         },
         "lint-shell-locale": {
             "type": "lint-shell-locale",
             "include": "(\\.sh$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^src/(secp256k1|univalue)/)",
                 "(^cmake/utils/log-and-print-on-failure.sh)"
             ]
         },
         "lint-cpp-void-parameters": {
             "type": "lint-cpp-void-parameters",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)",
                 "(^src/compat/glibc_compat.cpp$)"
             ]
         },
         "lint-logs": {
             "type": "lint-logs",
             "include": "(^src/.*\\.(h|cpp)$)"
         },
         "lint-qt": {
             "type": "lint-qt",
             "include": "(^src/qt/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/qt/(locale|forms|res)/)"
             ]
         },
         "lint-doxygen": {
             "type": "lint-doxygen",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-whitespace": {
             "type": "lint-whitespace",
             "include": "(\\.(ac|am|cmake|conf|in|include|json|m4|md|openrc|php|pl|sh|txt|yml)$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^src/(secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "lint-cppcheck": {
             "type": "lint-cppcheck",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/bench/nanobench.h$)"
             ]
         },
         "yamllint": {
             "type": "yamllint",
             "include": "(\\.(yml|yaml)$)",
             "exclude": [
                 "(^contrib/buildbot/python_phabricator/)"
             ]
         },
         "lint-check-nonfatal": {
             "type": "lint-check-nonfatal",
             "include": [
                 "(^src/rpc/.*\\.(h|c|cpp)$)",
                 "(^src/wallet/rpc*.*\\.(h|c|cpp)$)"
             ],
             "exclude": "(^src/rpc/server.cpp)"
         },
         "lint-markdown": {
             "type": "lint-markdown",
             "include": [
                 "(\\.md$)"
             ],
             "exclude": "(^contrib/gitian-builder/)"
         },
         "lint-python-mypy": {
             "type": "lint-python-mypy",
             "include": "(\\.py$)",
+            "exclude": "(^contrib/)",
             "flags": [
                 "--ignore-missing-imports"
             ]
         },
         "lint-python-mutable-default": {
             "type": "lint-python-mutable-default",
             "include": "(\\.py$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
                 "(^contrib/apple-sdk-tools/)",
                 "(^contrib/buildbot/python_phabricator/)"
             ]
         },
         "prettier": {
             "type": "prettier",
             "include": "(^web/.*\\.(css|html|js|json|jsx|md|scss|ts|tsx)$)",
             "exclude": "(^web/.*/translations/.*\\.json$)"
         }
     }
 }
diff --git a/contrib/utils/install-dependencies.sh b/contrib/utils/install-dependencies.sh
index 7b33f70d1..6009b6297 100755
--- a/contrib/utils/install-dependencies.sh
+++ b/contrib/utils/install-dependencies.sh
@@ -1,133 +1,134 @@
 #!/usr/bin/env bash
 
 export LC_ALL=C.UTF-8
 
 set -euxo pipefail
 
 dpkg --add-architecture i386
 
 PACKAGES=(
   arcanist
   automake
   autotools-dev
   binutils
   bsdmainutils
   build-essential
   ccache
   cppcheck
   curl
   default-jdk
   devscripts
   doxygen
   dput
   flake8
   g++-aarch64-linux-gnu
   g++-arm-linux-gnueabihf
   gettext-base
   git
   golang
   g++-mingw-w64
   gnupg
   graphviz
   gperf
   help2man
   imagemagick
   jq
   lcov
   less
   lib32stdc++-8-dev
   libboost-all-dev
   libbz2-dev
   libc6-dev:i386
   libcap-dev
   libdb++-dev
   libdb-dev
   libevent-dev
   libjemalloc-dev
   libminiupnpc-dev
   libprotobuf-dev
   libqrencode-dev
   libqt5core5a
   libqt5dbus5
   libqt5gui5
   librsvg2-bin
   libssl-dev
   libtiff-tools
   libtinfo5
   libtool
   libzmq3-dev
   lld
   make
+  mypy
   ninja-build
   nsis
   php-codesniffer
   pkg-config
   protobuf-compiler
   python3
   python3-autopep8
   python3-pip
   python3-setuptools
   python3-yaml
   python3-zmq
   qemu-user-static
   qttools5-dev
   qttools5-dev-tools
   software-properties-common
   tar
   wget
   xvfb
   yamllint
   wine
 )
 
 function join_by() {
   local IFS="$1"
   shift
   echo "$*"
 }
 
 apt-get update
 DEBIAN_FRONTEND=noninteractive apt-get install -y $(join_by ' ' "${PACKAGES[@]}")
 
 BACKPORTS=(
   cmake
   shellcheck
 )
 
 echo "deb http://deb.debian.org/debian buster-backports main" | tee -a /etc/apt/sources.list
 apt-get update
 DEBIAN_FRONTEND=noninteractive apt-get -t buster-backports install -y $(join_by ' ' "${BACKPORTS[@]}")
 
 
 # Install llvm-8 and clang-10
 apt-key add "$(dirname "$0")"/llvm.pub
 add-apt-repository "deb https://apt.llvm.org/buster/   llvm-toolchain-buster-8  main"
 add-apt-repository "deb https://apt.llvm.org/buster/   llvm-toolchain-buster-10  main"
 apt-get update
 
 LLVM_PACKAGES=(
   clang-10
   clang-format-8
   clang-tidy-8
   clang-tools-8
 )
 DEBIAN_FRONTEND=noninteractive apt-get install -y $(join_by ' ' "${LLVM_PACKAGES[@]}")
 
 # Use the mingw posix variant
 update-alternatives --set x86_64-w64-mingw32-g++ $(command -v x86_64-w64-mingw32-g++-posix)
 update-alternatives --set x86_64-w64-mingw32-gcc $(command -v x86_64-w64-mingw32-gcc-posix)
 
 # Python library for merging nested structures
 pip3 install deepmerge
 # For running Python test suites
 pip3 install pytest
 
 # Install pandoc. The version from buster is outdated, so get a more recent one
 # from github.
 wget https://github.com/jgm/pandoc/releases/download/2.10.1/pandoc-2.10.1-1-amd64.deb
 echo "4515d6fe2bf8b82765d8dfa1e1b63ccb0ff3332d60389f948672eaa37932e936 pandoc-2.10.1-1-amd64.deb" | sha256sum -c
 DEBIAN_FRONTEND=noninteractive dpkg -i pandoc-2.10.1-1-amd64.deb
 
 # Install npm v7.x and nodejs v15.x
 curl -sL https://deb.nodesource.com/setup_15.x | bash -
 apt-get install -y nodejs
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index cd06bbda6..744a21db5 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -1,899 +1,899 @@
 #!/usr/bin/env python3
 # Copyright (c) 2014-2019 The Bitcoin Core developers
 # Copyright (c) 2017 The Bitcoin developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Run regression test suite.
 
 This module calls down into individual test cases via subprocess. It will
 forward all unrecognized arguments onto the individual test scripts.
 
 For a description of arguments recognized by test scripts, see
 `test/functional/test_framework/test_framework.py:BitcoinTestFramework.main`.
 
 """
 
 import argparse
 from collections import deque
 import configparser
 import datetime
 import os
 import time
 import shutil
 import sys
 import subprocess
 import tempfile
 import re
 import logging
 import xml.etree.ElementTree as ET
 import json
 import threading
 import multiprocessing
 from queue import Queue, Empty
 import unittest
 
 # Formatting. Default colors to empty strings.
 BOLD, GREEN, RED, GREY = ("", ""), ("", ""), ("", ""), ("", "")
 try:
     # Make sure python thinks it can write unicode to its stdout
     "\u2713".encode("utf_8").decode(sys.stdout.encoding)
     TICK = "✓ "
     CROSS = "✖ "
     CIRCLE = "○ "
 except UnicodeDecodeError:
     TICK = "P "
     CROSS = "x "
     CIRCLE = "o "
 
-if os.name != 'nt' or sys.getwindowsversion() >= (10, 0, 14393):
+if os.name != 'nt' or sys.getwindowsversion() >= (10, 0, 14393):  # type: ignore
     if os.name == 'nt':
         import ctypes
         kernel32 = ctypes.windll.kernel32  # type: ignore
         ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4
         STD_OUTPUT_HANDLE = -11
         STD_ERROR_HANDLE = -12
         # Enable ascii color control to stdout
         stdout = kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
         stdout_mode = ctypes.c_int32()
         kernel32.GetConsoleMode(stdout, ctypes.byref(stdout_mode))
         kernel32.SetConsoleMode(
             stdout, stdout_mode.value | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
         # Enable ascii color control to stderr
         stderr = kernel32.GetStdHandle(STD_ERROR_HANDLE)
         stderr_mode = ctypes.c_int32()
         kernel32.GetConsoleMode(stderr, ctypes.byref(stderr_mode))
         kernel32.SetConsoleMode(
             stderr, stderr_mode.value | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
     # primitive formatting on supported
     # terminal via ANSI escape sequences:
     BOLD = ('\033[0m', '\033[1m')
     GREEN = ('\033[0m', '\033[0;32m')
     RED = ('\033[0m', '\033[0;31m')
     GREY = ('\033[0m', '\033[1;30m')
 
 TEST_EXIT_PASSED = 0
 TEST_EXIT_SKIPPED = 77
 
 TEST_FRAMEWORK_MODULES = [
     "address",
     "blocktools",
     "script",
 ]
 
 NON_SCRIPTS = [
     # These are python files that live in the functional tests directory, but
     # are not test scripts.
     "combine_logs.py",
     "create_cache.py",
     "test_runner.py",
 ]
 
 TEST_PARAMS = {
     # Some test can be run with additional parameters.
     # When a test is listed here, the it  will be run without parameters
     # as well as with additional parameters listed here.
     # This:
     #    example "testName" : [["--param1", "--param2"] , ["--param3"]]
     # will run the test 3 times:
     #    testName
     #    testName --param1 --param2
     #    testname --param3
     "rpc_bind.py": [["--ipv4"], ["--ipv6"], ["--nonloopback"]],
     "rpc_deriveaddresses.py": [["--usecli"]],
     "wallet_txn_doublespend.py": [["--mineblock"]],
     "wallet_txn_clone.py": [["--mineblock"]],
     "wallet_createwallet.py": [["--usecli"]],
     "wallet_multiwallet.py": [["--usecli"]],
     "wallet_watchonly.py": [["--usecli"]],
 }
 
 # Used to limit the number of tests, when list of tests is not provided on command line
 # When --extended is specified, we run all tests, otherwise
 # we only run a test if its execution time in seconds does not exceed
 # EXTENDED_CUTOFF
 DEFAULT_EXTENDED_CUTOFF = 40
 DEFAULT_JOBS = (multiprocessing.cpu_count() // 3) + 1
 
 
 class TestCase():
     """
     Data structure to hold and run information necessary to launch a test case.
     """
 
     def __init__(self, test_num, test_case, tests_dir,
                  tmpdir, failfast_event, flags=None):
         self.tests_dir = tests_dir
         self.tmpdir = tmpdir
         self.test_case = test_case
         self.test_num = test_num
         self.failfast_event = failfast_event
         self.flags = flags
 
     def run(self, portseed_offset):
         if self.failfast_event.is_set():
             return TestResult(self.test_num, self.test_case,
                               "", "Skipped", 0, "", "")
 
         portseed = self.test_num + portseed_offset
         portseed_arg = ["--portseed={}".format(portseed)]
         log_stdout = tempfile.SpooledTemporaryFile(max_size=2**16)
         log_stderr = tempfile.SpooledTemporaryFile(max_size=2**16)
         test_argv = self.test_case.split()
         testdir = os.path.join("{}", "{}_{}").format(
             self.tmpdir, re.sub(".py$", "", test_argv[0]), portseed)
         tmpdir_arg = ["--tmpdir={}".format(testdir)]
         start_time = time.time()
         process = subprocess.Popen([sys.executable, os.path.join(self.tests_dir, test_argv[0])] + test_argv[1:] + self.flags + portseed_arg + tmpdir_arg,
                                    universal_newlines=True,
                                    stdout=log_stdout,
                                    stderr=log_stderr)
 
         process.wait()
         log_stdout.seek(0), log_stderr.seek(0)
         [stdout, stderr] = [log.read().decode('utf-8')
                             for log in (log_stdout, log_stderr)]
         log_stdout.close(), log_stderr.close()
         if process.returncode == TEST_EXIT_PASSED and stderr == "":
             status = "Passed"
         elif process.returncode == TEST_EXIT_SKIPPED:
             status = "Skipped"
         else:
             status = "Failed"
 
         return TestResult(self.test_num, self.test_case, testdir, status,
                           time.time() - start_time, stdout, stderr)
 
 
 def on_ci():
     return os.getenv('TRAVIS') == 'true' or os.getenv(
         'TEAMCITY_VERSION') is not None
 
 
 def main():
     # Read config generated by configure.
     config = configparser.ConfigParser()
     configfile = os.path.join(os.path.abspath(
         os.path.dirname(__file__)), "..", "config.ini")
     config.read_file(open(configfile, encoding="utf8"))
 
     src_dir = config["environment"]["SRCDIR"]
     build_dir = config["environment"]["BUILDDIR"]
     tests_dir = os.path.join(src_dir, 'test', 'functional')
 
     # SRCDIR must be set for cdefs.py to find and parse consensus.h
     os.environ["SRCDIR"] = src_dir
 
     # Parse arguments and pass through unrecognised args
     parser = argparse.ArgumentParser(add_help=False,
                                      usage='%(prog)s [test_runner.py options] [script options] [scripts]',
                                      description=__doc__,
                                      epilog='''
     Help text and arguments for individual test script:''',
                                      formatter_class=argparse.ArgumentDefaultsHelpFormatter)
     parser.add_argument('--combinedlogslen', '-c', type=int, default=0, metavar='n',
                         help='On failure, print a log (of length n lines) to '
                              'the console, combined from the test framework '
                              'and all test nodes.')
     parser.add_argument('--coverage', action='store_true',
                         help='generate a basic coverage report for the RPC interface')
     parser.add_argument(
         '--exclude', '-x', help='specify a comma-separated-list of scripts to exclude.')
     parser.add_argument('--extended', action='store_true',
                         help='run the extended test suite in addition to the basic tests')
     parser.add_argument('--cutoff', type=int, default=DEFAULT_EXTENDED_CUTOFF,
                         help='set the cutoff runtime for what tests get run')
     parser.add_argument('--help', '-h', '-?',
                         action='store_true', help='print help text and exit')
     parser.add_argument('--jobs', '-j', type=int, default=DEFAULT_JOBS,
                         help='how many test scripts to run in parallel.')
     parser.add_argument('--keepcache', '-k', action='store_true',
                         help='the default behavior is to flush the cache directory on startup. --keepcache retains the cache from the previous testrun.')
     parser.add_argument('--quiet', '-q', action='store_true',
                         help='only print results summary and failure logs')
     parser.add_argument('--tmpdirprefix', '-t',
                         default=os.path.join(build_dir, 'test', 'tmp'), help="Root directory for datadirs")
     parser.add_argument(
         '--failfast',
         action='store_true',
         help='stop execution after the first test failure')
     parser.add_argument('--junitoutput', '-J',
                         help="File that will store JUnit formatted test results. If no absolute path is given it is treated as relative to the temporary directory.")
     parser.add_argument('--testsuitename', '-n', default='Bitcoin ABC functional tests',
                         help="Name of the test suite, as it will appear in the logs and in the JUnit report.")
     args, unknown_args = parser.parse_known_args()
 
     # args to be passed on always start with two dashes; tests are the
     # remaining unknown args
     tests = [arg for arg in unknown_args if arg[:2] != "--"]
     passon_args = [arg for arg in unknown_args if arg[:2] == "--"]
     passon_args.append("--configfile={}".format(configfile))
 
     # Set up logging
     logging_level = logging.INFO if args.quiet else logging.DEBUG
     logging.basicConfig(format='%(message)s', level=logging_level)
     logging.info("Starting {}".format(args.testsuitename))
 
     # Create base test directory
     tmpdir = os.path.join("{}", "test_runner_₿₵_🏃_{:%Y%m%d_%H%M%S}").format(
         args.tmpdirprefix, datetime.datetime.now())
 
     os.makedirs(tmpdir)
 
     logging.debug("Temporary test directory at {}".format(tmpdir))
 
     if args.junitoutput and not os.path.isabs(args.junitoutput):
         args.junitoutput = os.path.join(tmpdir, args.junitoutput)
 
     enable_bitcoind = config["components"].getboolean("ENABLE_BITCOIND")
 
     if not enable_bitcoind:
         print("No functional tests to run.")
         print("Rerun ./configure with --with-daemon and then make")
         sys.exit(0)
 
     # Build list of tests
     all_scripts = get_all_scripts_from_disk(tests_dir, NON_SCRIPTS)
 
     # Check all tests with parameters actually exist
     for test in TEST_PARAMS:
         if test not in all_scripts:
             print("ERROR: Test with parameter {} does not exist, check it has "
                   "not been renamed or deleted".format(test))
             sys.exit(1)
 
     if tests:
         # Individual tests have been specified. Run specified tests that exist
         # in the all_scripts list. Accept the name with or without .py
         # extension.
         individual_tests = [
             re.sub(r"\.py$", "", test) + ".py" for test in tests if not test.endswith('*')]
         test_list = []
         for test in individual_tests:
             if test in all_scripts:
                 test_list.append(test)
             else:
                 print("{}WARNING!{} Test '{}' not found in full test list.".format(
                     BOLD[1], BOLD[0], test))
 
         # Allow for wildcard at the end of the name, so a single input can
         # match multiple tests
         for test in tests:
             if test.endswith('*'):
                 test_list.extend(
                     [t for t in all_scripts if t.startswith(test[:-1])])
 
         # do not cut off explicitly specified tests
         cutoff = sys.maxsize
     else:
         # Run base tests only
         test_list = all_scripts
         cutoff = sys.maxsize if args.extended else args.cutoff
 
     # Remove the test cases that the user has explicitly asked to exclude.
     if args.exclude:
         exclude_tests = [re.sub(r"\.py$", "", test)
                          + (".py" if ".py" not in test else "") for test in args.exclude.split(',')]
         for exclude_test in exclude_tests:
             if exclude_test in test_list:
                 test_list.remove(exclude_test)
             else:
                 print("{}WARNING!{} Test '{}' not found in current test list.".format(
                     BOLD[1], BOLD[0], exclude_test))
 
     # Update timings from build_dir only if separate build directory is used.
     # We do not want to pollute source directory.
     build_timings = None
     if (src_dir != build_dir):
         build_timings = Timings(os.path.join(build_dir, 'timing.json'))
 
     # Always use timings from scr_dir if present
     src_timings = Timings(os.path.join(
         src_dir, "test", "functional", 'timing.json'))
 
     # Add test parameters and remove long running tests if needed
     test_list = get_tests_to_run(
         test_list, TEST_PARAMS, cutoff, src_timings)
 
     if not test_list:
         print("No valid test scripts specified. Check that your test is in one "
               "of the test lists in test_runner.py, or run test_runner.py with no arguments to run all tests")
         sys.exit(0)
 
     if args.help:
         # Print help for test_runner.py, then print help of the first script
         # and exit.
         parser.print_help()
         subprocess.check_call(
             [sys.executable, os.path.join(tests_dir, test_list[0]), '-h'])
         sys.exit(0)
 
     check_script_prefixes(all_scripts)
 
     if not args.keepcache:
         shutil.rmtree(os.path.join(build_dir, "test",
                                    "cache"), ignore_errors=True)
 
     run_tests(
         test_list,
         build_dir,
         tests_dir,
         args.junitoutput,
         tmpdir,
         num_jobs=args.jobs,
         test_suite_name=args.testsuitename,
         enable_coverage=args.coverage,
         args=passon_args,
         combined_logs_len=args.combinedlogslen,
         build_timings=build_timings,
         failfast=args.failfast
     )
 
 
 def run_tests(test_list, build_dir, tests_dir, junitoutput, tmpdir, num_jobs, test_suite_name,
               enable_coverage=False, args=None, combined_logs_len=0, build_timings=None, failfast=False):
     args = args or []
 
     # Warn if bitcoind is already running (unix only)
     try:
         pidofOutput = subprocess.check_output(["pidof", "bitcoind"])
         if pidofOutput is not None and pidofOutput != b'':
             print("{}WARNING!{} There is already a bitcoind process running on this system. Tests may fail unexpectedly due to resource contention!".format(
                 BOLD[1], BOLD[0]))
     except (OSError, subprocess.SubprocessError):
         pass
 
     # Warn if there is a cache directory
     cache_dir = os.path.join(build_dir, "test", "cache")
     if os.path.isdir(cache_dir):
         print("{}WARNING!{} There is a cache directory here: {}. If tests fail unexpectedly, try deleting the cache directory.".format(
             BOLD[1], BOLD[0], cache_dir))
 
     # Test Framework Tests
     print("Running Unit Tests for Test Framework Modules")
     test_framework_tests = unittest.TestSuite()
     for module in TEST_FRAMEWORK_MODULES:
         test_framework_tests.addTest(
             unittest.TestLoader().loadTestsFromName(
                 "test_framework.{}".format(module)))
     result = unittest.TextTestRunner(
         verbosity=1, failfast=True).run(test_framework_tests)
     if not result.wasSuccessful():
         logging.debug(
             "Early exiting after failure in TestFramework unit tests")
         sys.exit(False)
 
     flags = ['--cachedir={}'.format(cache_dir)] + args
 
     if enable_coverage:
         coverage = RPCCoverage()
         flags.append(coverage.flag)
         logging.debug(
             "Initializing coverage directory at {}".format(coverage.dir))
     else:
         coverage = None
 
     if len(test_list) > 1 and num_jobs > 1:
         # Populate cache
         try:
             subprocess.check_output([sys.executable, os.path.join(
                 tests_dir, 'create_cache.py')] + flags + [os.path.join("--tmpdir={}", "cache") .format(tmpdir)])
         except subprocess.CalledProcessError as e:
             sys.stdout.buffer.write(e.output)
             raise
 
     # Run Tests
     start_time = time.time()
     test_results = execute_test_processes(
         num_jobs, test_list, tests_dir, tmpdir, flags, failfast)
     runtime = time.time() - start_time
 
     max_len_name = len(max(test_list, key=len))
     print_results(test_results, tests_dir, max_len_name,
                   runtime, combined_logs_len)
 
     if junitoutput is not None:
         save_results_as_junit(
             test_results,
             junitoutput,
             runtime,
             test_suite_name)
 
     if (build_timings is not None):
         build_timings.save_timings(test_results)
 
     if coverage:
         coverage_passed = coverage.report_rpc_coverage()
 
         logging.debug("Cleaning up coverage data")
         coverage.cleanup()
     else:
         coverage_passed = True
 
     # Clear up the temp directory if all subdirectories are gone
     if not os.listdir(tmpdir):
         os.rmdir(tmpdir)
 
     all_passed = all(map(
         lambda test_result: test_result.was_successful, test_results)) and coverage_passed
 
     sys.exit(not all_passed)
 
 
 def execute_test_processes(
         num_jobs, test_list, tests_dir, tmpdir, flags, failfast=False):
     update_queue = Queue()
     job_queue = Queue()
     failfast_event = threading.Event()
     test_results = []
     poll_timeout = 10  # seconds
     # In case there is a graveyard of zombie bitcoinds, we can apply a
     # pseudorandom offset to hopefully jump over them.
     # (625 is PORT_RANGE/MAX_NODES)
     portseed_offset = int(time.time() * 1000) % 625
 
     ##
     # Define some helper functions we will need for threading.
     ##
 
     def handle_message(message, running_jobs):
         """
         handle_message handles a single message from handle_test_cases
         """
         if isinstance(message, TestCase):
             running_jobs.append((message.test_num, message.test_case))
             print("{}{}{} started".format(BOLD[1], message.test_case, BOLD[0]))
             return
 
         if isinstance(message, TestResult):
             test_result = message
 
             running_jobs.remove((test_result.num, test_result.name))
             test_results.append(test_result)
 
             if test_result.status == "Passed":
                 print("{}{}{} passed, Duration: {} s".format(
                     BOLD[1], test_result.name, BOLD[0], TimeResolution.seconds(test_result.time)))
             elif test_result.status == "Skipped":
                 print("{}{}{} skipped".format(
                     BOLD[1], test_result.name, BOLD[0]))
             else:
                 print("{}{}{} failed, Duration: {} s\n".format(
                     BOLD[1], test_result.name, BOLD[0], TimeResolution.seconds(test_result.time)))
                 print(BOLD[1] + 'stdout:' + BOLD[0])
                 print(test_result.stdout)
                 print(BOLD[1] + 'stderr:' + BOLD[0])
                 print(test_result.stderr)
 
                 if failfast:
                     logging.debug("Early exiting after test failure")
                     failfast_event.set()
             return
 
         assert False, "we should not be here"
 
     def handle_update_messages():
         """
         handle_update_messages waits for messages to be sent from handle_test_cases via the
         update_queue.  It serializes the results so we can print nice status update messages.
         """
         printed_status = False
         running_jobs = []
 
         while True:
             message = None
             try:
                 message = update_queue.get(True, poll_timeout)
                 if message is None:
                     break
 
                 # We printed a status message, need to kick to the next line
                 # before printing more.
                 if printed_status:
                     print()
                     printed_status = False
 
                 handle_message(message, running_jobs)
                 update_queue.task_done()
             except Empty:
                 if not on_ci():
                     print("Running jobs: {}".format(
                         ", ".join([j[1] for j in running_jobs])), end="\r")
                     sys.stdout.flush()
                     printed_status = True
 
     def handle_test_cases():
         """
         job_runner represents a single thread that is part of a worker pool.
         It waits for a test, then executes that test.
         It also reports start and result messages to handle_update_messages
         """
         while True:
             test = job_queue.get()
             if test is None:
                 break
             # Signal that the test is starting to inform the poor waiting
             # programmer
             update_queue.put(test)
             result = test.run(portseed_offset)
             update_queue.put(result)
             job_queue.task_done()
 
     ##
     # Setup our threads, and start sending tasks
     ##
 
     # Start our result collection thread.
     resultCollector = threading.Thread(target=handle_update_messages)
     resultCollector.daemon = True
     resultCollector.start()
 
     # Start some worker threads
     for job in range(num_jobs):
         t = threading.Thread(target=handle_test_cases)
         t.daemon = True
         t.start()
 
     # Push all our test cases into the job queue.
     for i, t in enumerate(test_list):
         job_queue.put(TestCase(i, t, tests_dir, tmpdir, failfast_event, flags))
 
     # Wait for all the jobs to be completed
     job_queue.join()
 
     # Wait for all the results to be compiled
     update_queue.join()
 
     # Flush our queues so the threads exit
     update_queue.put(None)
     for job in range(num_jobs):
         job_queue.put(None)
 
     return test_results
 
 
 def print_results(test_results, tests_dir, max_len_name,
                   runtime, combined_logs_len):
     results = "\n" + BOLD[1] + "{} | {} | {}\n\n".format(
         "TEST".ljust(max_len_name), "STATUS   ", "DURATION") + BOLD[0]
 
     test_results.sort(key=TestResult.sort_key)
     all_passed = True
     time_sum = 0
 
     for test_result in test_results:
         all_passed = all_passed and test_result.was_successful
         time_sum += test_result.time
         test_result.padding = max_len_name
         results += str(test_result)
 
         testdir = test_result.testdir
         if combined_logs_len and os.path.isdir(testdir):
             # Print the final `combinedlogslen` lines of the combined logs
             print('{}Combine the logs and print the last {} lines ...{}'.format(
                 BOLD[1], combined_logs_len, BOLD[0]))
             print('\n============')
             print('{}Combined log for {}:{}'.format(BOLD[1], testdir, BOLD[0]))
             print('============\n')
             combined_logs_args = [
                 sys.executable, os.path.join(
                     tests_dir, 'combine_logs.py'), testdir]
 
             if BOLD[0]:
                 combined_logs_args += ['--color']
                 combined_logs, _ = subprocess.Popen(
                     combined_logs_args, universal_newlines=True, stdout=subprocess.PIPE).communicate()
             print(
                 "\n".join(
                     deque(
                         combined_logs.splitlines(),
                         combined_logs_len)))
 
     status = TICK + "Passed" if all_passed else CROSS + "Failed"
     if not all_passed:
         results += RED[1]
     results += BOLD[1] + "\n{} | {} | {} s (accumulated) \n".format(
         "ALL".ljust(max_len_name), status.ljust(9), TimeResolution.seconds(time_sum)) + BOLD[0]
     if not all_passed:
         results += RED[0]
     results += "Runtime: {} s\n".format(TimeResolution.seconds(runtime))
     print(results)
 
 
 class TestResult():
     """
     Simple data structure to store test result values and print them properly
     """
 
     def __init__(self, num, name, testdir, status, time, stdout, stderr):
         self.num = num
         self.name = name
         self.testdir = testdir
         self.status = status
         self.time = time
         self.padding = 0
         self.stdout = stdout
         self.stderr = stderr
 
     def sort_key(self):
         if self.status == "Passed":
             return 0, self.name.lower()
         elif self.status == "Failed":
             return 2, self.name.lower()
         elif self.status == "Skipped":
             return 1, self.name.lower()
 
     def __repr__(self):
         if self.status == "Passed":
             color = GREEN
             glyph = TICK
         elif self.status == "Failed":
             color = RED
             glyph = CROSS
         elif self.status == "Skipped":
             color = GREY
             glyph = CIRCLE
 
         return color[1] + "{} | {}{} | {} s\n".format(
             self.name.ljust(self.padding), glyph, self.status.ljust(7), TimeResolution.seconds(self.time)) + color[0]
 
     @property
     def was_successful(self):
         return self.status != "Failed"
 
 
 def get_all_scripts_from_disk(test_dir, non_scripts):
     """
     Return all available test script from script directory (excluding NON_SCRIPTS)
     """
     python_files = set([t for t in os.listdir(test_dir) if t[-3:] == ".py"])
     return list(python_files - set(non_scripts))
 
 
 def check_script_prefixes(all_scripts):
     """Check that no more than `EXPECTED_VIOLATION_COUNT` of the
        test scripts don't start with one of the allowed name prefixes."""
     EXPECTED_VIOLATION_COUNT = 16
 
     # LEEWAY is provided as a transition measure, so that pull-requests
     # that introduce new tests that don't conform with the naming
     # convention don't immediately cause the tests to fail.
     LEEWAY = 0
 
     good_prefixes_re = re.compile(
         "(abc_)?(example|feature|interface|mempool|mining|p2p|rpc|wallet|tool)_")
     bad_script_names = [
         script for script in all_scripts if good_prefixes_re.match(script) is None]
 
     if len(bad_script_names) < EXPECTED_VIOLATION_COUNT:
         print(
             "{}HURRAY!{} Number of functional tests violating naming convention reduced!".format(
                 BOLD[1],
                 BOLD[0]))
         print("Consider reducing EXPECTED_VIOLATION_COUNT from {} to {}".format(
             EXPECTED_VIOLATION_COUNT, len(bad_script_names)))
     elif len(bad_script_names) > EXPECTED_VIOLATION_COUNT:
         print(
             "INFO: {} tests not meeting naming conventions (expected {}):".format(len(bad_script_names), EXPECTED_VIOLATION_COUNT))
         print("  {}".format("\n  ".join(sorted(bad_script_names))))
         assert len(bad_script_names) <= EXPECTED_VIOLATION_COUNT + \
             LEEWAY, "Too many tests not following naming convention! ({} found, expected: <= {})".format(
                 len(bad_script_names), EXPECTED_VIOLATION_COUNT)
 
 
 def get_tests_to_run(test_list, test_params, cutoff, src_timings):
     """
     Returns only test that will not run longer that cutoff.
     Long running tests are returned first to favor running tests in parallel
     Timings from build directory override those from src directory
     """
 
     def get_test_time(test):
         # Return 0 if test is unknown to always run it
         return next(
             (x['time'] for x in src_timings.existing_timings if x['name'] == test), 0)
 
     # Some tests must also be run with additional parameters. Add them to the
     # list.
     tests_with_params = []
     for test_name in test_list:
         # always execute a test without parameters
         tests_with_params.append(test_name)
         params = test_params.get(test_name)
         if params is not None:
             tests_with_params.extend(
                 [test_name + " " + " ".join(parameter) for parameter in params])
 
     result = [
         test for test in tests_with_params if get_test_time(test) <= cutoff]
     result.sort(key=lambda x: (-get_test_time(x), x))
     return result
 
 
 class RPCCoverage():
     """
     Coverage reporting utilities for test_runner.
 
     Coverage calculation works by having each test script subprocess write
     coverage files into a particular directory. These files contain the RPC
     commands invoked during testing, as well as a complete listing of RPC
     commands per `bitcoin-cli help` (`rpc_interface.txt`).
 
     After all tests complete, the commands run are combined and diff'd against
     the complete list to calculate uncovered RPC commands.
 
     See also: test/functional/test_framework/coverage.py
 
     """
 
     def __init__(self):
         self.dir = tempfile.mkdtemp(prefix="coverage")
         self.flag = '--coveragedir={}'.format(self.dir)
 
     def report_rpc_coverage(self):
         """
         Print out RPC commands that were unexercised by tests.
 
         """
         uncovered = self._get_uncovered_rpc_commands()
 
         if uncovered:
             print("Uncovered RPC commands:")
             print("".join(("  - {}\n".format(i)) for i in sorted(uncovered)))
             return False
         else:
             print("All RPC commands covered.")
             return True
 
     def cleanup(self):
         return shutil.rmtree(self.dir)
 
     def _get_uncovered_rpc_commands(self):
         """
         Return a set of currently untested RPC commands.
 
         """
         # This is shared from `test/functional/test-framework/coverage.py`
         reference_filename = 'rpc_interface.txt'
         coverage_file_prefix = 'coverage.'
 
         coverage_ref_filename = os.path.join(self.dir, reference_filename)
         coverage_filenames = set()
         all_cmds = set()
         covered_cmds = set()
 
         if not os.path.isfile(coverage_ref_filename):
             raise RuntimeError("No coverage reference found")
 
         with open(coverage_ref_filename, 'r', encoding="utf8") as file:
             all_cmds.update([line.strip() for line in file.readlines()])
 
         for root, _, files in os.walk(self.dir):
             for filename in files:
                 if filename.startswith(coverage_file_prefix):
                     coverage_filenames.add(os.path.join(root, filename))
 
         for filename in coverage_filenames:
             with open(filename, 'r', encoding="utf8") as file:
                 covered_cmds.update([line.strip()
                                      for line in file.readlines()])
 
         return all_cmds - covered_cmds
 
 
 def save_results_as_junit(test_results, file_name, time, test_suite_name):
     """
     Save tests results to file in JUnit format
 
     See http://llg.cubic.org/docs/junit/ for specification of format
     """
     e_test_suite = ET.Element("testsuite",
                               {"name": "{}".format(test_suite_name),
                                "tests": str(len(test_results)),
                                # "errors":
                                "failures": str(len([t for t in test_results if t.status == "Failed"])),
                                "id": "0",
                                "skipped": str(len([t for t in test_results if t.status == "Skipped"])),
                                "time": str(TimeResolution.milliseconds(time)),
                                "timestamp": datetime.datetime.now().isoformat('T')
                                })
 
     for test_result in test_results:
         e_test_case = ET.SubElement(e_test_suite, "testcase",
                                     {"name": test_result.name,
                                      "classname": test_result.name,
                                      "time": str(TimeResolution.milliseconds(test_result.time))
                                      }
                                     )
         if test_result.status == "Skipped":
             ET.SubElement(e_test_case, "skipped")
         elif test_result.status == "Failed":
             ET.SubElement(e_test_case, "failure")
         # no special element for passed tests
 
         ET.SubElement(e_test_case, "system-out").text = test_result.stdout
         ET.SubElement(e_test_case, "system-err").text = test_result.stderr
 
     ET.ElementTree(e_test_suite).write(
         file_name, "UTF-8", xml_declaration=True)
 
 
 class Timings():
     """
     Takes care of loading, merging and saving tests execution times.
     """
 
     def __init__(self, timing_file):
         self.timing_file = timing_file
         self.existing_timings = self.load_timings()
 
     def load_timings(self):
         if os.path.isfile(self.timing_file):
             with open(self.timing_file, encoding="utf8") as file:
                 return json.load(file)
         else:
             return []
 
     def get_merged_timings(self, new_timings):
         """
         Return new list containing existing timings updated with new timings
         Tests that do not exists are not removed
         """
 
         key = 'name'
         merged = {}
         for item in self.existing_timings + new_timings:
             if item[key] in merged:
                 merged[item[key]].update(item)
             else:
                 merged[item[key]] = item
 
         # Sort the result to preserve test ordering in file
         merged = list(merged.values())
         merged.sort(key=lambda t, key=key: t[key])
         return merged
 
     def save_timings(self, test_results):
         # we only save test that have passed - timings for failed test might be
         # wrong (timeouts or early fails)
         passed_results = [
             test for test in test_results if test.status == 'Passed']
         new_timings = list(map(lambda test: {'name': test.name, 'time': TimeResolution.seconds(test.time)},
                                passed_results))
         merged_timings = self.get_merged_timings(new_timings)
 
         with open(self.timing_file, 'w', encoding="utf8") as file:
             json.dump(merged_timings, file, indent=True)
 
 
 class TimeResolution:
     @staticmethod
     def seconds(time_fractional_second):
         return round(time_fractional_second)
 
     @staticmethod
     def milliseconds(time_fractional_second):
         return round(time_fractional_second, 3)
 
 
 if __name__ == '__main__':
     main()