text: #!/usr/bin/env python3
  # Copyright (c) 2017-2020 The Fujicoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Class for fujicoind node under test"""
  
  import contextlib
  import decimal
  import errno
  from enum import Enum
  import http.client
  import json
  import logging
  import os
  import re
  import subprocess
  import tempfile
  import time
  import urllib.parse
  import collections
  import shlex
  import sys
  
  from .authproxy import JSONRPCException
  from .descriptors import descsum_create
  from .p2p import P2P_SUBVERSION
  from .util import (
      MAX_NODES,
      assert_equal,
      append_config,
      delete_cookie_file,
      get_auth_cookie,
      get_rpc_proxy,
      rpc_url,
      wait_until_helper,
      p2p_port,
      EncodeDecimal,
  )
  
  FUJICOIND_PROC_WAIT_TIMEOUT = 60
  
  
  class FailedToStartError(Exception):
      """Raised when a node fails to start correctly."""
  
  
  class ErrorMatch(Enum):
      FULL_TEXT = 1
      FULL_REGEX = 2
      PARTIAL_REGEX = 3
  
  
  class TestNode():
      """A class for representing a fujicoind node under test.
  
      This class contains:
  
      - state about the node (whether it's running, etc)
      - a Python subprocess.Popen object representing the running process
      - an RPC connection to the node
      - one or more P2P connections to the node
  
  
      To make things easier for the test writer, any unrecognised messages will
      be dispatched to the RPC connection."""
  
      def __init__(self, i, datadir, *, chain, rpchost, timewait, timeout_factor, fujicoind, fujicoin_cli, coverage_dir, cwd, extra_conf=None, extra_args=None, use_cli=False, start_perf=False, use_valgrind=False, version=None, descriptors=False):
          """
          Kwargs:
              start_perf (bool): If True, begin profiling the node with `perf` as soon as
                  the node starts.
          """
  
          self.index = i
          self.p2p_conn_index = 1
          self.datadir = datadir
          self.fujicoinconf = os.path.join(self.datadir, "fujicoin.conf")
          self.stdout_dir = os.path.join(self.datadir, "stdout")
          self.stderr_dir = os.path.join(self.datadir, "stderr")
          self.chain = chain
          self.rpchost = rpchost
          self.rpc_timeout = timewait
          self.binary = fujicoind
          self.coverage_dir = coverage_dir
          self.cwd = cwd
          self.descriptors = descriptors
          if extra_conf is not None:
              append_config(datadir, extra_conf)
          # Most callers will just need to add extra args to the standard list below.
          # For those callers that need more flexibility, they can just set the args property directly.
          # Note that common args are set in the config file (see initialize_datadir)
          self.extra_args = extra_args
          self.version = version
          # Configuration for logging is set as command-line args rather than in the fujicoin.conf file.
          # This means that starting a fujicoind using the temp dir to debug a failed test won't
          # spam debug.log.
          self.args = [
              self.binary,
              "-datadir=" + self.datadir,
              "-logtimemicros",
              "-debug",
              "-debugexclude=libevent",
              "-debugexclude=leveldb",
              "-uacomment=testnode%d" % i,
          ]
          if use_valgrind:
              default_suppressions_file = os.path.join(
                  os.path.dirname(os.path.realpath(__file__)),
                  "..", "..", "..", "contrib", "valgrind.supp")
              suppressions_file = os.getenv("VALGRIND_SUPPRESSIONS_FILE",
                                            default_suppressions_file)
              self.args = ["valgrind", "--suppressions={}".format(suppressions_file),
                           "--gen-suppressions=all", "--exit-on-first-error=yes",
                           "--error-exitcode=1", "--quiet"] + self.args
  
          if self.version_is_at_least(190000):
              self.args.append("-logthreadnames")
          if self.version_is_at_least(219900):
              self.args.append("-logsourcelocations")
  
          self.cli = TestNodeCLI(fujicoin_cli, self.datadir)
          self.use_cli = use_cli
          self.start_perf = start_perf
  
          self.running = False
          self.process = None
          self.rpc_connected = False
          self.rpc = None
          self.url = None
          self.log = logging.getLogger('TestFramework.node%d' % i)
          self.cleanup_on_exit = True # Whether to kill the node when this object goes away
          # Cache perf subprocesses here by their data output filename.
          self.perf_subprocesses = {}
  
          self.p2ps = []
          self.timeout_factor = timeout_factor
  
      AddressKeyPair = collections.namedtuple('AddressKeyPair', ['address', 'key'])
      PRIV_KEYS = [
              # address , privkey
              AddressKeyPair('mjTkW3DjgyZck4KbiRusZsqTgaYTxdSz6z', 'cVpF924EspNh8KjYsfhgY96mmxvT6DgdWiTYMtMjuM74hJaU5psW'),
              AddressKeyPair('msX6jQXvxiNhx3Q62PKeLPrhrqZQdSimTg', 'cUxsWyKyZ9MAQTaAhUQWJmBbSvHMwSmuv59KgxQV7oZQU3PXN3KE'),
              AddressKeyPair('mnonCMyH9TmAsSj3M59DsbH8H63U3RKoFP', 'cTrh7dkEAeJd6b3MRX9bZK8eRmNqVCMH3LSUkE3dSFDyzjU38QxK'),
              AddressKeyPair('mqJupas8Dt2uestQDvV2NH3RU8uZh2dqQR', 'cVuKKa7gbehEQvVq717hYcbE9Dqmq7KEBKqWgWrYBa2CKKrhtRim'),
              AddressKeyPair('msYac7Rvd5ywm6pEmkjyxhbCDKqWsVeYws', 'cQDCBuKcjanpXDpCqacNSjYfxeQj8G6CAtH1Dsk3cXyqLNC4RPuh'),
              AddressKeyPair('n2rnuUnwLgXqf9kk2kjvVm8R5BZK1yxQBi', 'cQakmfPSLSqKHyMFGwAqKHgWUiofJCagVGhiB4KCainaeCSxeyYq'),
              AddressKeyPair('myzuPxRwsf3vvGzEuzPfK9Nf2RfwauwYe6', 'cQMpDLJwA8DBe9NcQbdoSb1BhmFxVjWD5gRyrLZCtpuF9Zi3a9RK'),
              AddressKeyPair('mumwTaMtbxEPUswmLBBN3vM9oGRtGBrys8', 'cSXmRKXVcoouhNNVpcNKFfxsTsToY5pvB9DVsFksF1ENunTzRKsy'),
              AddressKeyPair('mpV7aGShMkJCZgbW7F6iZgrvuPHjZjH9qg', 'cSoXt6tm3pqy43UMabY6eUTmR3eSUYFtB2iNQDGgb3VUnRsQys2k'),
              AddressKeyPair('mq4fBNdckGtvY2mijd9am7DRsbRB4KjUkf', 'cN55daf1HotwBAgAKWVgDcoppmUNDtQSfb7XLutTLeAgVc3u8hik'),
              AddressKeyPair('mpFAHDjX7KregM3rVotdXzQmkbwtbQEnZ6', 'cT7qK7g1wkYEMvKowd2ZrX1E5f6JQ7TM246UfqbCiyF7kZhorpX3'),
              AddressKeyPair('mzRe8QZMfGi58KyWCse2exxEFry2sfF2Y7', 'cPiRWE8KMjTRxH1MWkPerhfoHFn5iHPWVK5aPqjW8NxmdwenFinJ'),
      ]
  
      def get_deterministic_priv_key(self):
          """Return a deterministic priv key in base58, that only depends on the node's index"""
          assert len(self.PRIV_KEYS) == MAX_NODES
          return self.PRIV_KEYS[self.index]
  
      def _node_msg(self, msg: str) -> str:
          """Return a modified msg that identifies this node by its index as a debugging aid."""
          return "[node %d] %s" % (self.index, msg)
  
      def _raise_assertion_error(self, msg: str):
          """Raise an AssertionError with msg modified to identify this node."""
          raise AssertionError(self._node_msg(msg))
  
      def __del__(self):
          # Ensure that we don't leave any fujicoind processes lying around after
          # the test ends
          if self.process and self.cleanup_on_exit:
              # Should only happen on test failure
              # Avoid using logger, as that may have already been shutdown when
              # this destructor is called.
              print(self._node_msg("Cleaning up leftover process"))
              self.process.kill()
  
      def __getattr__(self, name):
          """Dispatches any unrecognised messages to the RPC connection or a CLI instance."""
          if self.use_cli:
              return getattr(RPCOverloadWrapper(self.cli, True, self.descriptors), name)
          else:
              assert self.rpc_connected and self.rpc is not None, self._node_msg("Error: no RPC connection")
              return getattr(RPCOverloadWrapper(self.rpc, descriptors=self.descriptors), name)
  
      def start(self, extra_args=None, *, cwd=None, stdout=None, stderr=None, **kwargs):
          """Start the node."""
          if extra_args is None:
              extra_args = self.extra_args
  
          # Add a new stdout and stderr file each time fujicoind is started
          if stderr is None:
              stderr = tempfile.NamedTemporaryFile(dir=self.stderr_dir, delete=False)
          if stdout is None:
              stdout = tempfile.NamedTemporaryFile(dir=self.stdout_dir, delete=False)
          self.stderr = stderr
          self.stdout = stdout
  
          if cwd is None:
              cwd = self.cwd
  
          # Delete any existing cookie file -- if such a file exists (eg due to
          # unclean shutdown), it will get overwritten anyway by fujicoind, and
          # potentially interfere with our attempt to authenticate
          delete_cookie_file(self.datadir, self.chain)
  
          # add environment variable LIBC_FATAL_STDERR_=1 so that libc errors are written to stderr and not the terminal
          subp_env = dict(os.environ, LIBC_FATAL_STDERR_="1")
  
          self.process = subprocess.Popen(self.args + extra_args, env=subp_env, stdout=stdout, stderr=stderr, cwd=cwd, **kwargs)
  
          self.running = True
          self.log.debug("fujicoind started, waiting for RPC to come up")
  
          if self.start_perf:
              self._start_perf()
  
      def wait_for_rpc_connection(self):
          """Sets up an RPC connection to the fujicoind process. Returns False if unable to connect."""
          # Poll at a rate of four times per second
          poll_per_s = 4
          for _ in range(poll_per_s * self.rpc_timeout):
              if self.process.poll() is not None:
                  raise FailedToStartError(self._node_msg(
                      'fujicoind exited with status {} during initialization'.format(self.process.returncode)))
              try:
                  rpc = get_rpc_proxy(
                      rpc_url(self.datadir, self.index, self.chain, self.rpchost),
                      self.index,
                      timeout=self.rpc_timeout // 2,  # Shorter timeout to allow for one retry in case of ETIMEDOUT
                      coveragedir=self.coverage_dir,
                  )
                  rpc.getblockcount()
                  # If the call to getblockcount() succeeds then the RPC connection is up
                  if self.version_is_at_least(190000):
                      # getmempoolinfo.loaded is available since commit
                      # bb8ae2c (version 0.19.0)
                      wait_until_helper(lambda: rpc.getmempoolinfo()['loaded'], timeout_factor=self.timeout_factor)
                      # Wait for the node to finish reindex, block import, and
                      # loading the mempool. Usually importing happens fast or
                      # even "immediate" when the node is started. However, there
                      # is no guarantee and sometimes ThreadImport might finish
                      # later. This is going to cause intermittent test failures,
                      # because generally the tests assume the node is fully
                      # ready after being started.
                      #
                      # For example, the node will reject block messages from p2p
                      # when it is still importing with the error "Unexpected
                      # block message received"
                      #
                      # The wait is done here to make tests as robust as possible
                      # and prevent racy tests and intermittent failures as much
                      # as possible. Some tests might not need this, but the
                      # overhead is trivial, and the added guarantees are worth
                      # the minimal performance cost.
                  self.log.debug("RPC successfully started")
                  if self.use_cli:
                      return
                  self.rpc = rpc
                  self.rpc_connected = True
                  self.url = self.rpc.url
                  return
              except JSONRPCException as e:  # Initialization phase
                  # -28 RPC in warmup
                  # -342 Service unavailable, RPC server started but is shutting down due to error
                  if e.error['code'] != -28 and e.error['code'] != -342:
                      raise  # unknown JSON RPC exception
              except ConnectionResetError:
                  # This might happen when the RPC server is in warmup, but shut down before the call to getblockcount
                  # succeeds. Try again to properly raise the FailedToStartError
                  pass
              except OSError as e:
                  if e.errno == errno.ETIMEDOUT:
                      pass  # Treat identical to ConnectionResetError
                  elif e.errno == errno.ECONNREFUSED:
                      pass  # Port not yet open?
                  else:
                      raise  # unknown OS error
              except ValueError as e:  # cookie file not found and no rpcuser or rpcpassword; fujicoind is still starting
                  if "No RPC credentials" not in str(e):
                      raise
              time.sleep(1.0 / poll_per_s)
          self._raise_assertion_error("Unable to connect to fujicoind after {}s".format(self.rpc_timeout))
  
      def wait_for_cookie_credentials(self):
          """Ensures auth cookie credentials can be read, e.g. for testing CLI with -rpcwait before RPC connection is up."""
          self.log.debug("Waiting for cookie credentials")
          # Poll at a rate of four times per second.
          poll_per_s = 4
          for _ in range(poll_per_s * self.rpc_timeout):
              try:
                  get_auth_cookie(self.datadir, self.chain)
                  self.log.debug("Cookie credentials successfully retrieved")
                  return
              except ValueError:  # cookie file not found and no rpcuser or rpcpassword; fujicoind is still starting
                  pass            # so we continue polling until RPC credentials are retrieved
              time.sleep(1.0 / poll_per_s)
          self._raise_assertion_error("Unable to retrieve cookie credentials after {}s".format(self.rpc_timeout))
  
      def generate(self, nblocks, maxtries=1000000):
          self.log.debug("TestNode.generate() dispatches `generate` call to `generatetoaddress`")
          return self.generatetoaddress(nblocks=nblocks, address=self.get_deterministic_priv_key().address, maxtries=maxtries)
  
      def get_wallet_rpc(self, wallet_name):
          if self.use_cli:
              return RPCOverloadWrapper(self.cli("-rpcwallet={}".format(wallet_name)), True, self.descriptors)
          else:
              assert self.rpc_connected and self.rpc, self._node_msg("RPC not connected")
              wallet_path = "wallet/{}".format(urllib.parse.quote(wallet_name))
              return RPCOverloadWrapper(self.rpc / wallet_path, descriptors=self.descriptors)
  
      def version_is_at_least(self, ver):
          return self.version is None or self.version >= ver
  
      def stop_node(self, expected_stderr='', *, wait=0, wait_until_stopped=True):
          """Stop the node."""
          if not self.running:
              return
          self.log.debug("Stopping node")
          try:
              # Do not use wait argument when testing older nodes, e.g. in feature_backwards_compatibility.py
              if self.version_is_at_least(180000):
                  self.stop(wait=wait)
              else:
                  self.stop()
          except http.client.CannotSendRequest:
              self.log.exception("Unable to stop node.")
  
          # If there are any running perf processes, stop them.
          for profile_name in tuple(self.perf_subprocesses.keys()):
              self._stop_perf(profile_name)
  
          # Check that stderr is as expected
          self.stderr.seek(0)
          stderr = self.stderr.read().decode('utf-8').strip()
          if stderr != expected_stderr:
              raise AssertionError("Unexpected stderr {} != {}".format(stderr, expected_stderr))
  
          self.stdout.close()
          self.stderr.close()
  
          del self.p2ps[:]
  
          if wait_until_stopped:
              self.wait_until_stopped()
  
      def is_node_stopped(self):
          """Checks whether the node has stopped.
  
          Returns True if the node has stopped. False otherwise.
          This method is responsible for freeing resources (self.process)."""
          if not self.running:
              return True
          return_code = self.process.poll()
          if return_code is None:
              return False
  
          # process has stopped. Assert that it didn't return an error code.
          assert return_code == 0, self._node_msg(
              "Node returned non-zero exit code (%d) when stopping" % return_code)
          self.running = False
          self.process = None
          self.rpc_connected = False
          self.rpc = None
          self.log.debug("Node stopped")
          return True
  
      def wait_until_stopped(self, timeout=FUJICOIND_PROC_WAIT_TIMEOUT):
          wait_until_helper(self.is_node_stopped, timeout=timeout, timeout_factor=self.timeout_factor)
  
      @contextlib.contextmanager
      def assert_debug_log(self, expected_msgs, unexpected_msgs=None, timeout=2):
          if unexpected_msgs is None:
              unexpected_msgs = []
          time_end = time.time() + timeout * self.timeout_factor
          debug_log = os.path.join(self.datadir, self.chain, 'debug.log')
          with open(debug_log, encoding='utf-8') as dl:
              dl.seek(0, 2)
              prev_size = dl.tell()
  
          yield
  
          while True:
              found = True
              with open(debug_log, encoding='utf-8') as dl:
                  dl.seek(prev_size)
                  log = dl.read()
              print_log = " - " + "\n - ".join(log.splitlines())
              for unexpected_msg in unexpected_msgs:
                  if re.search(re.escape(unexpected_msg), log, flags=re.MULTILINE):
                      self._raise_assertion_error('Unexpected message "{}" partially matches log:\n\n{}\n\n'.format(unexpected_msg, print_log))
              for expected_msg in expected_msgs:
                  if re.search(re.escape(expected_msg), log, flags=re.MULTILINE) is None:
                      found = False
              if found:
                  return
              if time.time() >= time_end:
                  break
              time.sleep(0.05)
          self._raise_assertion_error('Expected messages "{}" does not partially match log:\n\n{}\n\n'.format(str(expected_msgs), print_log))
  
      @contextlib.contextmanager
      def profile_with_perf(self, profile_name: str):
          """
          Context manager that allows easy profiling of node activity using `perf`.
  
          See `test/functional/README.md` for details on perf usage.
  
          Args:
              profile_name: This string will be appended to the
                  profile data filename generated by perf.
          """
          subp = self._start_perf(profile_name)
  
          yield
  
          if subp:
              self._stop_perf(profile_name)
  
      def _start_perf(self, profile_name=None):
          """Start a perf process to profile this node.
  
          Returns the subprocess running perf."""
          subp = None
  
          def test_success(cmd):
              return subprocess.call(
                  # shell=True required for pipe use below
                  cmd, shell=True,
                  stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL) == 0
  
          if not sys.platform.startswith('linux'):
              self.log.warning("Can't profile with perf; only available on Linux platforms")
              return None
  
          if not test_success('which perf'):
              self.log.warning("Can't profile with perf; must install perf-tools")
              return None
  
          if not test_success('readelf -S {} | grep .debug_str'.format(shlex.quote(self.binary))):
              self.log.warning(
                  "perf output won't be very useful without debug symbols compiled into fujicoind")
  
          output_path = tempfile.NamedTemporaryFile(
              dir=self.datadir,
              prefix="{}.perf.data.".format(profile_name or 'test'),
              delete=False,
          ).name
  
          cmd = [
              'perf', 'record',
              '-g',                     # Record the callgraph.
              '--call-graph', 'dwarf',  # Compatibility for gcc's --fomit-frame-pointer.
              '-F', '101',              # Sampling frequency in Hz.
              '-p', str(self.process.pid),
              '-o', output_path,
          ]
          subp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          self.perf_subprocesses[profile_name] = subp
  
          return subp
  
      def _stop_perf(self, profile_name):
          """Stop (and pop) a perf subprocess."""
          subp = self.perf_subprocesses.pop(profile_name)
          output_path = subp.args[subp.args.index('-o') + 1]
  
          subp.terminate()
          subp.wait(timeout=10)
  
          stderr = subp.stderr.read().decode()
          if 'Consider tweaking /proc/sys/kernel/perf_event_paranoid' in stderr:
              self.log.warning(
                  "perf couldn't collect data! Try "
                  "'sudo sysctl -w kernel.perf_event_paranoid=-1'")
          else:
              report_cmd = "perf report -i {}".format(output_path)
              self.log.info("See perf output by running '{}'".format(report_cmd))
  
      def assert_start_raises_init_error(self, extra_args=None, expected_msg=None, match=ErrorMatch.FULL_TEXT, *args, **kwargs):
          """Attempt to start the node and expect it to raise an error.
  
          extra_args: extra arguments to pass through to fujicoind
          expected_msg: regex that stderr should match when fujicoind fails
  
          Will throw if fujicoind starts without an error.
          Will throw if an expected_msg is provided and it does not match fujicoind's stdout."""
          with tempfile.NamedTemporaryFile(dir=self.stderr_dir, delete=False) as log_stderr, \
               tempfile.NamedTemporaryFile(dir=self.stdout_dir, delete=False) as log_stdout:
              try:
                  self.start(extra_args, stdout=log_stdout, stderr=log_stderr, *args, **kwargs)
                  ret = self.process.wait(timeout=self.rpc_timeout)
                  self.log.debug(self._node_msg(f'fujicoind exited with status {ret} during initialization'))
                  assert ret != 0  # Exit code must indicate failure
                  self.running = False
                  self.process = None
                  # Check stderr for expected message
                  if expected_msg is not None:
                      log_stderr.seek(0)
                      stderr = log_stderr.read().decode('utf-8').strip()
                      if match == ErrorMatch.PARTIAL_REGEX:
                          if re.search(expected_msg, stderr, flags=re.MULTILINE) is None:
                              self._raise_assertion_error(
                                  'Expected message "{}" does not partially match stderr:\n"{}"'.format(expected_msg, stderr))
                      elif match == ErrorMatch.FULL_REGEX:
                          if re.fullmatch(expected_msg, stderr) is None:
                              self._raise_assertion_error(
                                  'Expected message "{}" does not fully match stderr:\n"{}"'.format(expected_msg, stderr))
                      elif match == ErrorMatch.FULL_TEXT:
                          if expected_msg != stderr:
                              self._raise_assertion_error(
                                  'Expected message "{}" does not fully match stderr:\n"{}"'.format(expected_msg, stderr))
              except subprocess.TimeoutExpired:
                  self.process.kill()
                  self.running = False
                  self.process = None
                  assert_msg = f'fujicoind should have exited within {self.rpc_timeout}s '
                  if expected_msg is None:
                      assert_msg += "with an error"
                  else:
                      assert_msg += "with expected error " + expected_msg
                  self._raise_assertion_error(assert_msg)
  
      def add_p2p_connection(self, p2p_conn, *, wait_for_verack=True, **kwargs):
          """Add an inbound p2p connection to the node.
  
          This method adds the p2p connection to the self.p2ps list and also
          returns the connection to the caller."""
          if 'dstport' not in kwargs:
              kwargs['dstport'] = p2p_port(self.index)
          if 'dstaddr' not in kwargs:
              kwargs['dstaddr'] = '127.0.0.1'
  
          p2p_conn.peer_connect(**kwargs, net=self.chain, timeout_factor=self.timeout_factor)()
          self.p2ps.append(p2p_conn)
          p2p_conn.wait_until(lambda: p2p_conn.is_connected, check_connected=False)
          if wait_for_verack:
              # Wait for the node to send us the version and verack
              p2p_conn.wait_for_verack()
              # At this point we have sent our version message and received the version and verack, however the full node
              # has not yet received the verack from us (in reply to their version). So, the connection is not yet fully
              # established (fSuccessfullyConnected).
              #
              # This shouldn't lead to any issues when sending messages, since the verack will be in-flight before the
              # message we send. However, it might lead to races where we are expecting to receive a message. E.g. a
              # transaction that will be added to the mempool as soon as we return here.
              #
              # So syncing here is redundant when we only want to send a message, but the cost is low (a few milliseconds)
              # in comparison to the upside of making tests less fragile and unexpected intermittent errors less likely.
              p2p_conn.sync_with_ping()
  
              # Consistency check that the Fujicoin Core has received our user agent string. This checks the
              # node's newest peer. It could be racy if another Fujicoin Core node has connected since we opened
              # our connection, but we don't expect that to happen.
              assert_equal(self.getpeerinfo()[-1]['subver'], P2P_SUBVERSION)
  
          return p2p_conn
  
      def add_outbound_p2p_connection(self, p2p_conn, *, p2p_idx, connection_type="outbound-full-relay", **kwargs):
          """Add an outbound p2p connection from node. Must be an
          "outbound-full-relay", "block-relay-only" or "addr-fetch" connection.
  
          This method adds the p2p connection to the self.p2ps list and returns
          the connection to the caller.
          """
  
          def addconnection_callback(address, port):
              self.log.debug("Connecting to %s:%d %s" % (address, port, connection_type))
              self.addconnection('%s:%d' % (address, port), connection_type)
  
          p2p_conn.peer_accept_connection(connect_cb=addconnection_callback, connect_id=p2p_idx + 1, net=self.chain, timeout_factor=self.timeout_factor, **kwargs)()
  
          p2p_conn.wait_for_connect()
          self.p2ps.append(p2p_conn)
  
          p2p_conn.wait_for_verack()
          p2p_conn.sync_with_ping()
  
          return p2p_conn
  
      def num_test_p2p_connections(self):
          """Return number of test framework p2p connections to the node."""
          return len([peer for peer in self.getpeerinfo() if peer['subver'] == P2P_SUBVERSION])
  
      def disconnect_p2ps(self):
          """Close all p2p connections to the node."""
          for p in self.p2ps:
              p.peer_disconnect()
          del self.p2ps[:]
  
          wait_until_helper(lambda: self.num_test_p2p_connections() == 0, timeout_factor=self.timeout_factor)
  
  
  class TestNodeCLIAttr:
      def __init__(self, cli, command):
          self.cli = cli
          self.command = command
  
      def __call__(self, *args, **kwargs):
          return self.cli.send_cli(self.command, *args, **kwargs)
  
      def get_request(self, *args, **kwargs):
          return lambda: self(*args, **kwargs)
  
  
  def arg_to_cli(arg):
      if isinstance(arg, bool):
          return str(arg).lower()
      elif arg is None:
          return 'null'
      elif isinstance(arg, dict) or isinstance(arg, list):
          return json.dumps(arg, default=EncodeDecimal)
      else:
          return str(arg)
  
  
  class TestNodeCLI():
      """Interface to fujicoin-cli for an individual node"""
      def __init__(self, binary, datadir):
          self.options = []
          self.binary = binary
          self.datadir = datadir
          self.input = None
          self.log = logging.getLogger('TestFramework.fujicoincli')
  
      def __call__(self, *options, input=None):
          # TestNodeCLI is callable with fujicoin-cli command-line options
          cli = TestNodeCLI(self.binary, self.datadir)
          cli.options = [str(o) for o in options]
          cli.input = input
          return cli
  
      def __getattr__(self, command):
          return TestNodeCLIAttr(self, command)
  
      def batch(self, requests):
          results = []
          for request in requests:
              try:
                  results.append(dict(result=request()))
              except JSONRPCException as e:
                  results.append(dict(error=e))
          return results
  
      def send_cli(self, command=None, *args, **kwargs):
          """Run fujicoin-cli command. Deserializes returned string as python object."""
          pos_args = [arg_to_cli(arg) for arg in args]
          named_args = [str(key) + "=" + arg_to_cli(value) for (key, value) in kwargs.items()]
          assert not (pos_args and named_args), "Cannot use positional arguments and named arguments in the same fujicoin-cli call"
          p_args = [self.binary, "-datadir=" + self.datadir] + self.options
          if named_args:
              p_args += ["-named"]
          if command is not None:
              p_args += [command]
          p_args += pos_args + named_args
          self.log.debug("Running fujicoin-cli {}".format(p_args[2:]))
          process = subprocess.Popen(p_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
          cli_stdout, cli_stderr = process.communicate(input=self.input)
          returncode = process.poll()
          if returncode:
              match = re.match(r'error code: ([-0-9]+)\nerror message:\n(.*)', cli_stderr)
              if match:
                  code, message = match.groups()
                  raise JSONRPCException(dict(code=int(code), message=message))
              # Ignore cli_stdout, raise with cli_stderr
              raise subprocess.CalledProcessError(returncode, self.binary, output=cli_stderr)
          try:
              return json.loads(cli_stdout, parse_float=decimal.Decimal)
          except (json.JSONDecodeError, decimal.InvalidOperation):
              return cli_stdout.rstrip("\n")
  
  class RPCOverloadWrapper():
      def __init__(self, rpc, cli=False, descriptors=False):
          self.rpc = rpc
          self.is_cli = cli
          self.descriptors = descriptors
  
      def __getattr__(self, name):
          return getattr(self.rpc, name)
  
      def createwallet(self, wallet_name, disable_private_keys=None, blank=None, passphrase='', avoid_reuse=None, descriptors=None, load_on_startup=None, external_signer=None):
          if descriptors is None:
              descriptors = self.descriptors
          return self.__getattr__('createwallet')(wallet_name, disable_private_keys, blank, passphrase, avoid_reuse, descriptors, load_on_startup, external_signer)
  
      def importprivkey(self, privkey, label=None, rescan=None):
          wallet_info = self.getwalletinfo()
          if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
              return self.__getattr__('importprivkey')(privkey, label, rescan)
          desc = descsum_create('combo(' + privkey + ')')
          req = [{
              'desc': desc,
              'timestamp': 0 if rescan else 'now',
              'label': label if label else ''
          }]
          import_res = self.importdescriptors(req)
          if not import_res[0]['success']:
              raise JSONRPCException(import_res[0]['error'])
  
      def addmultisigaddress(self, nrequired, keys, label=None, address_type=None):
          wallet_info = self.getwalletinfo()
          if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
              return self.__getattr__('addmultisigaddress')(nrequired, keys, label, address_type)
          cms = self.createmultisig(nrequired, keys, address_type)
          req = [{
              'desc': cms['descriptor'],
              'timestamp': 0,
              'label': label if label else ''
          }]
          import_res = self.importdescriptors(req)
          if not import_res[0]['success']:
              raise JSONRPCException(import_res[0]['error'])
          return cms
  
      def importpubkey(self, pubkey, label=None, rescan=None):
          wallet_info = self.getwalletinfo()
          if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
              return self.__getattr__('importpubkey')(pubkey, label, rescan)
          desc = descsum_create('combo(' + pubkey + ')')
          req = [{
              'desc': desc,
              'timestamp': 0 if rescan else 'now',
              'label': label if label else ''
          }]
          import_res = self.importdescriptors(req)
          if not import_res[0]['success']:
              raise JSONRPCException(import_res[0]['error'])
  
      def importaddress(self, address, label=None, rescan=None, p2sh=None):
          wallet_info = self.getwalletinfo()
          if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
              return self.__getattr__('importaddress')(address, label, rescan, p2sh)
          is_hex = False
          try:
              int(address ,16)
              is_hex = True
              desc = descsum_create('raw(' + address + ')')
          except:
              desc = descsum_create('addr(' + address + ')')
          reqs = [{
              'desc': desc,
              'timestamp': 0 if rescan else 'now',
              'label': label if label else ''
          }]
          if is_hex and p2sh:
              reqs.append({
                  'desc': descsum_create('p2sh(raw(' + address + '))'),
                  'timestamp': 0 if rescan else 'now',
                  'label': label if label else ''
              })
          import_res = self.importdescriptors(reqs)
          for res in import_res:
              if not res['success']:
                  raise JSONRPCException(res['error'])
  