dash/test/functional/test_framework/test_framework.py

#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Copyright (c) 2014-2020 The Dash Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Base class for RPC testing."""
import copy
from collections import deque
from enum import Enum
import logging
import optparse
import os
import pdb
import shutil
import sys
import tempfile
import time
import traceback
from concurrent.futures import ThreadPoolExecutor

from .authproxy import JSONRPCException
from . import coverage
from .test_node import TestNode
from .util import (
    PortSeed,
    MAX_NODES,
    assert_equal,
    check_json_precision,
    connect_nodes_bi,
    connect_nodes,
    copy_datadir,
    disconnect_nodes,
    force_finish_mnsync,
    get_datadir_path,
    initialize_datadir,
    p2p_port,
    set_node_times,
    satoshi_round,
    sync_blocks,
    sync_mempools,
    wait_until,
)

class TestStatus(Enum):
    PASSED = 1
    FAILED = 2
    SKIPPED = 3

TEST_EXIT_PASSED = 0
TEST_EXIT_FAILED = 1
TEST_EXIT_SKIPPED = 77

GENESISTIME = 1417713337

class BitcoinTestFramework():
    """Base class for a bitcoin test script.

    Individual bitcoin test scripts should subclass this class and override the set_test_params() and run_test() methods.

    Individual tests can also override the following methods to customize the test setup:

    - add_options()
    - setup_chain()
    - setup_network()
    - setup_nodes()

    The __init__() and main() methods should not be overridden.

    This class also contains various public and private helper methods."""

    def __init__(self):
        """Sets test framework defaults. Do not override this method. Instead, override the set_test_params() method"""
        self.setup_clean_chain = False
        self.nodes = []
        self.mocktime = 0
        self.supports_cli = False
        self.set_test_params()

        assert hasattr(self, "num_nodes"), "Test must set self.num_nodes in set_test_params()"

    def main(self):
        """Main function. This should not be overridden by the subclass test scripts."""

        parser = optparse.OptionParser(usage="%prog [options]")
        parser.add_option("--nocleanup", dest="nocleanup", default=False, action="store_true",
                          help="Leave dashds and test.* datadir on exit or error")
        parser.add_option("--noshutdown", dest="noshutdown", default=False, action="store_true",
                          help="Don't stop dashds after the test execution")
        parser.add_option("--srcdir", dest="srcdir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__)) + "/../../../src"),
                          help="Source directory containing dashd/dash-cli (default: %default)")
        parser.add_option("--cachedir", dest="cachedir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__)) + "/../../cache"),
                          help="Directory for caching pregenerated datadirs")
        parser.add_option("--tmpdir", dest="tmpdir", help="Root directory for datadirs")
        parser.add_option("-l", "--loglevel", dest="loglevel", default="INFO",
                          help="log events at this level and higher to the console. Can be set to DEBUG, INFO, WARNING, ERROR or CRITICAL. Passing --loglevel DEBUG will output all logs to console. Note that logs at all levels are always written to the test_framework.log file in the temporary test directory.")
        parser.add_option("--tracerpc", dest="trace_rpc", default=False, action="store_true",
                          help="Print out all RPC calls as they are made")
        parser.add_option("--portseed", dest="port_seed", default=os.getpid(), type='int',
                          help="The seed to use for assigning port numbers (default: current process id)")
        parser.add_option("--coveragedir", dest="coveragedir",
                          help="Write tested RPC commands into this directory")
        parser.add_option("--configfile", dest="configfile",
                          help="Location of the test framework config file")
        parser.add_option("--pdbonfailure", dest="pdbonfailure", default=False, action="store_true",
                          help="Attach a python debugger if test fails")
        parser.add_option("--usecli", dest="usecli", default=False, action="store_true",
                          help="use bitcoin-cli instead of RPC for all commands")
        self.add_options(parser)
        (self.options, self.args) = parser.parse_args()

        PortSeed.n = self.options.port_seed

        os.environ['PATH'] = self.options.srcdir + ":" + self.options.srcdir + "/qt:" + os.environ['PATH']

        check_json_precision()

        self.options.cachedir = os.path.abspath(self.options.cachedir)

        # Set up temp directory and start logging
        if self.options.tmpdir:
            self.options.tmpdir = os.path.abspath(self.options.tmpdir)
            os.makedirs(self.options.tmpdir, exist_ok=False)
        else:
            self.options.tmpdir = tempfile.mkdtemp(prefix="test")
        self._start_logging()

        success = TestStatus.FAILED

        try:
            if self.options.usecli and not self.supports_cli:
                raise SkipTest("--usecli specified but test does not support using CLI")
            self.setup_chain()
            self.setup_network()
            self.run_test()
            success = TestStatus.PASSED
        except JSONRPCException as e:
            self.log.exception("JSONRPC error")
        except SkipTest as e:
            self.log.warning("Test Skipped: %s" % e.message)
            success = TestStatus.SKIPPED
        except AssertionError as e:
            self.log.exception("Assertion failed")
        except KeyError as e:
            self.log.exception("Key error")
        except Exception as e:
            self.log.exception("Unexpected exception caught during testing")
        except KeyboardInterrupt as e:
            self.log.warning("Exiting after keyboard interrupt")

        if success == TestStatus.FAILED and self.options.pdbonfailure:
            print("Testcase failed. Attaching python debugger. Enter ? for help")
            pdb.set_trace()

        if not self.options.noshutdown:
            self.log.info("Stopping nodes")
            try:
                if self.nodes:
                    self.stop_nodes()
            except BaseException as e:
                success = False
                self.log.exception("Unexpected exception caught during shutdown")
        else:
            for node in self.nodes:
                node.cleanup_on_exit = False
            self.log.info("Note: dashds were not stopped and may still be running")

        if not self.options.nocleanup and not self.options.noshutdown and success != TestStatus.FAILED:
            self.log.info("Cleaning up")
            shutil.rmtree(self.options.tmpdir)
        else:
            self.log.warning("Not cleaning up dir %s" % self.options.tmpdir)
            if os.getenv("PYTHON_DEBUG", ""):
                # Dump the end of the debug logs, to aid in debugging rare
                # travis failures.
                import glob
                filenames = [self.options.tmpdir + "/test_framework.log"]
                filenames += glob.glob(self.options.tmpdir + "/node*/regtest/debug.log")
                MAX_LINES_TO_PRINT = 1000
                for fn in filenames:
                    try:
                        with open(fn, 'r') as f:
                            print("From", fn, ":")
                            print("".join(deque(f, MAX_LINES_TO_PRINT)))
                    except OSError:
                        print("Opening file %s failed." % fn)
                        traceback.print_exc()

        if success == TestStatus.PASSED:
            self.log.info("Tests successful")
            sys.exit(TEST_EXIT_PASSED)
        elif success == TestStatus.SKIPPED:
            self.log.info("Test skipped")
            sys.exit(TEST_EXIT_SKIPPED)
        else:
            self.log.error("Test failed. Test logging available at %s/test_framework.log", self.options.tmpdir)
            logging.shutdown()
            sys.exit(TEST_EXIT_FAILED)

    # Methods to override in subclass test scripts.
    def set_test_params(self):
        """Tests must this method to change default values for number of nodes, topology, etc"""
        raise NotImplementedError

    def add_options(self, parser):
        """Override this method to add command-line options to the test"""
        pass

    def setup_chain(self):
        """Override this method to customize blockchain setup"""
        self.log.info("Initializing test directory " + self.options.tmpdir)
        if self.setup_clean_chain:
            self._initialize_chain_clean()
            self.set_genesis_mocktime()
        else:
            self._initialize_chain()
            self.set_cache_mocktime()

    def setup_network(self):
        """Override this method to customize test network topology"""
        self.setup_nodes()

        # Connect the nodes as a "chain".  This allows us
        # to split the network between nodes 1 and 2 to get
        # two halves that can work on competing chains.
        for i in range(self.num_nodes - 1):
            connect_nodes_bi(self.nodes, i, i + 1)
        self.sync_all()

    def setup_nodes(self):
        """Override this method to customize test node setup"""
        extra_args = None
        stderr = None
        if hasattr(self, "extra_args"):
            extra_args = self.extra_args
        if hasattr(self, "stderr"):
            stderr = self.stderr
        self.add_nodes(self.num_nodes, extra_args, stderr=stderr)
        self.start_nodes()

    def run_test(self):
        """Tests must override this method to define test logic"""
        raise NotImplementedError

    # Public helper methods. These can be accessed by the subclass test scripts.

    def add_nodes(self, num_nodes, extra_args=None, rpchost=None, timewait=None, binary=None, stderr=None):
        """Instantiate TestNode objects"""

        if extra_args is None:
            extra_args = [[]] * num_nodes
        if binary is None:
            binary = [None] * num_nodes
        assert_equal(len(extra_args), num_nodes)
        assert_equal(len(binary), num_nodes)
        old_num_nodes = len(self.nodes)
        for i in range(num_nodes):
            self.nodes.append(TestNode(old_num_nodes + i, self.options.tmpdir, extra_args[i], rpchost, timewait=timewait, binary=binary[i], stderr=stderr, mocktime=self.mocktime, coverage_dir=self.options.coveragedir, use_cli=self.options.usecli))

    def start_node(self, i, *args, **kwargs):
        """Start a dashd"""

        node = self.nodes[i]

        node.start(*args, **kwargs)
        node.wait_for_rpc_connection()

        if self.options.coveragedir is not None:
            coverage.write_all_rpc_commands(self.options.coveragedir, node.rpc)

    def start_nodes(self, extra_args=None, stderr=None, *args, **kwargs):
        """Start multiple dashds"""

        if extra_args is None:
            extra_args = [None] * self.num_nodes
        assert_equal(len(extra_args), self.num_nodes)
        try:
            for i, node in enumerate(self.nodes):
                node.start(extra_args[i], stderr, *args, **kwargs)
            for node in self.nodes:
                node.wait_for_rpc_connection()
        except:
            # If one node failed to start, stop the others
            self.stop_nodes()
            raise

        if self.options.coveragedir is not None:
            for node in self.nodes:
                coverage.write_all_rpc_commands(self.options.coveragedir, node.rpc)

    def stop_node(self, i, wait=0):
        """Stop a dashd test node"""
        self.nodes[i].stop_node(wait=wait)
        self.nodes[i].wait_until_stopped()

    def stop_nodes(self, wait=0):
        """Stop multiple dashd test nodes"""
        for node in self.nodes:
            # Issue RPC to stop nodes
            node.stop_node(wait=wait)

        for node in self.nodes:
            # Wait for nodes to stop
            node.wait_until_stopped()

    def restart_node(self, i, extra_args=None):
        """Stop and start a test node"""
        self.stop_node(i)
        self.start_node(i, extra_args)

    def assert_start_raises_init_error(self, i, extra_args=None, expected_msg=None, *args, **kwargs):
        with tempfile.SpooledTemporaryFile(max_size=2**16) as log_stderr:
            try:
                self.start_node(i, extra_args, stderr=log_stderr, *args, **kwargs)
                self.stop_node(i)
            except Exception as e:
                assert 'dashd exited' in str(e)  # node must have shutdown
                self.nodes[i].running = False
                self.nodes[i].process = None
                if expected_msg is not None:
                    log_stderr.seek(0)
                    stderr = log_stderr.read().decode('utf-8')
                    if expected_msg not in stderr:
                        raise AssertionError("Expected error \"" + expected_msg + "\" not found in:\n" + stderr)
            else:
                if expected_msg is None:
                    assert_msg = "dashd should have exited with an error"
                else:
                    assert_msg = "dashd should have exited with expected error " + expected_msg
                raise AssertionError(assert_msg)

    def wait_for_node_exit(self, i, timeout):
        self.nodes[i].process.wait(timeout)

    def split_network(self):
        """
        Split the network of four nodes into nodes 0/1 and 2/3.
        """
        disconnect_nodes(self.nodes[1], 2)
        disconnect_nodes(self.nodes[2], 1)
        self.sync_all([self.nodes[:2], self.nodes[2:]])

    def join_network(self):
        """
        Join the (previously split) network halves together.
        """
        connect_nodes_bi(self.nodes, 1, 2)
        self.sync_all()

    def sync_all(self, node_groups=None):
        if not node_groups:
            node_groups = [self.nodes]

        for group in node_groups:
            sync_blocks(group)
            sync_mempools(group)

    def disable_mocktime(self):
        self.mocktime = 0

    def bump_mocktime(self, t):
        self.mocktime += t

    def set_cache_mocktime(self):
        # For backwared compatibility of the python scripts
        # with previous versions of the cache, set MOCKTIME
        # to regtest genesis time + (201 * 156)
        self.mocktime = GENESISTIME + (201 * 156)

    def set_genesis_mocktime(self):
        self.mocktime = GENESISTIME

    # Private helper methods. These should not be accessed by the subclass test scripts.

    def _start_logging(self):
        # Add logger and logging handlers
        self.log = logging.getLogger('TestFramework')
        self.log.setLevel(logging.DEBUG)
        # Create file handler to log all messages
        fh = logging.FileHandler(self.options.tmpdir + '/test_framework.log')
        fh.setLevel(logging.DEBUG)
        # Create console handler to log messages to stderr. By default this logs only error messages, but can be configured with --loglevel.
        ch = logging.StreamHandler(sys.stdout)
        # User can provide log level as a number or string (eg DEBUG). loglevel was caught as a string, so try to convert it to an int
        ll = int(self.options.loglevel) if self.options.loglevel.isdigit() else self.options.loglevel.upper()
        ch.setLevel(ll)
        # Format logs the same as dashd's debug.log with microprecision (so log files can be concatenated and sorted)
        formatter = logging.Formatter(fmt='%(asctime)s.%(msecs)03d000 %(name)s (%(levelname)s): %(message)s', datefmt='%Y-%m-%d %H:%M:%S')
        formatter.converter = time.gmtime
        fh.setFormatter(formatter)
        ch.setFormatter(formatter)
        # add the handlers to the logger
        self.log.addHandler(fh)
        self.log.addHandler(ch)

        if self.options.trace_rpc:
            rpc_logger = logging.getLogger("BitcoinRPC")
            rpc_logger.setLevel(logging.DEBUG)
            rpc_handler = logging.StreamHandler(sys.stdout)
            rpc_handler.setLevel(logging.DEBUG)
            rpc_logger.addHandler(rpc_handler)

    def _initialize_chain(self, extra_args=None, stderr=None):
        """Initialize a pre-mined blockchain for use by the test.

        Create a cache of a 200-block-long chain (with wallet) for MAX_NODES
        Afterward, create num_nodes copies from the cache."""

        assert self.num_nodes <= MAX_NODES
        create_cache = False
        for i in range(MAX_NODES):
            if not os.path.isdir(get_datadir_path(self.options.cachedir, i)):
                create_cache = True
                break

        if create_cache:
            self.log.debug("Creating data directories from cached datadir")

            # find and delete old cache directories if any exist
            for i in range(MAX_NODES):
                if os.path.isdir(get_datadir_path(self.options.cachedir, i)):
                    shutil.rmtree(get_datadir_path(self.options.cachedir, i))

            # Create cache directories, run dashds:
            self.set_genesis_mocktime()
            for i in range(MAX_NODES):
                datadir = initialize_datadir(self.options.cachedir, i)
                args = [os.getenv("DASHD", "dashd"), "-server", "-keypool=1", "-datadir=" + datadir, "-discover=0", "-mocktime="+str(GENESISTIME)]
                if i > 0:
                    args.append("-connect=127.0.0.1:" + str(p2p_port(0)))
                if extra_args is not None:
                    args.extend(extra_args)
                self.nodes.append(TestNode(i, self.options.cachedir, extra_args=[], rpchost=None, timewait=None, binary=None, stderr=stderr, mocktime=self.mocktime, coverage_dir=None))
                self.nodes[i].args = args
                self.start_node(i)

            # Wait for RPC connections to be ready
            for node in self.nodes:
                node.wait_for_rpc_connection()

            # Create a 200-block-long chain; each of the 4 first nodes
            # gets 25 mature blocks and 25 immature.
            # Note: To preserve compatibility with older versions of
            # initialize_chain, only 4 nodes will generate coins.
            #
            # blocks are created with timestamps 10 minutes apart
            # starting from 2010 minutes in the past
            block_time = GENESISTIME
            for i in range(2):
                for peer in range(4):
                    for j in range(25):
                        set_node_times(self.nodes, block_time)
                        self.nodes[peer].generate(1)
                        block_time += 156
                    # Must sync before next peer starts generating blocks
                    sync_blocks(self.nodes)

            # Shut them down, and clean up cache directories:
            self.stop_nodes()
            self.nodes = []
            self.disable_mocktime()

            def cache_path(n, *paths):
                return os.path.join(get_datadir_path(self.options.cachedir, n), "regtest", *paths)

            for i in range(MAX_NODES):
                for entry in os.listdir(cache_path(i)):
                    if entry not in ['wallets', 'chainstate', 'blocks', 'evodb', 'llmq', 'backups']:
                        os.remove(cache_path(i, entry))

        for i in range(self.num_nodes):
            from_dir = get_datadir_path(self.options.cachedir, i)
            to_dir = get_datadir_path(self.options.tmpdir, i)
            shutil.copytree(from_dir, to_dir)
            initialize_datadir(self.options.tmpdir, i)  # Overwrite port/rpcport in dash.conf

    def _initialize_chain_clean(self):
        """Initialize empty blockchain for use by the test.

        Create an empty blockchain and num_nodes wallets.
        Useful if a test case wants complete control over initialization."""
        for i in range(self.num_nodes):
            initialize_datadir(self.options.tmpdir, i)

MASTERNODE_COLLATERAL = 1000


class MasternodeInfo:
    def __init__(self, proTxHash, ownerAddr, votingAddr, pubKeyOperator, keyOperator, collateral_address, collateral_txid, collateral_vout):
        self.proTxHash = proTxHash
        self.ownerAddr = ownerAddr
        self.votingAddr = votingAddr
        self.pubKeyOperator = pubKeyOperator
        self.keyOperator = keyOperator
        self.collateral_address = collateral_address
        self.collateral_txid = collateral_txid
        self.collateral_vout = collateral_vout


class DashTestFramework(BitcoinTestFramework):
    def set_dash_test_params(self, num_nodes, masterodes_count, extra_args=None, fast_dip3_enforcement=False):
        self.mn_count = masterodes_count
        self.num_nodes = num_nodes
        self.mninfo = []
        self.setup_clean_chain = True
        self.is_network_split = False
        # additional args
        if extra_args is None:
            extra_args = [[]] * num_nodes
        assert_equal(len(extra_args), num_nodes)
        self.extra_args = [copy.deepcopy(a) for a in extra_args]
        self.extra_args[0] += ["-sporkkey=cP4EKFyJsHT39LDqgdcB43Y3YXjNyjb5Fuas1GQSeAtjnZWmZEQK"]
        self.fast_dip3_enforcement = fast_dip3_enforcement
        if fast_dip3_enforcement:
            for i in range(0, num_nodes):
                self.extra_args[i].append("-dip3params=30:50")

        # LLMQ default test params (no need to pass -llmqtestparams)
        self.llmq_size = 3
        self.llmq_threshold = 2

    def set_dash_dip8_activation(self, activate_after_block):
        window = int((activate_after_block + 2) / 3)
        threshold = int((window + 1) / 2)
        for i in range(0, self.num_nodes):
            self.extra_args[i].append("-vbparams=dip0008:0:999999999999:%d:%d" % (window, threshold))

    def set_dash_llmq_test_params(self, llmq_size, llmq_threshold):
        self.llmq_size = llmq_size
        self.llmq_threshold = llmq_threshold
        for i in range(0, self.num_nodes):
            self.extra_args[i].append("-llmqtestparams=%d:%d" % (self.llmq_size, self.llmq_threshold))

    def create_simple_node(self):
        idx = len(self.nodes)
        self.add_nodes(1, extra_args=[self.extra_args[idx]])
        self.start_node(idx)
        for i in range(0, idx):
            connect_nodes(self.nodes[i], idx)

    def prepare_masternodes(self):
        self.log.info("Preparing %d masternodes" % self.mn_count)
        for idx in range(0, self.mn_count):
            self.prepare_masternode(idx)

    def prepare_masternode(self, idx):
        bls = self.nodes[0].bls('generate')
        address = self.nodes[0].getnewaddress()
        txid = self.nodes[0].sendtoaddress(address, MASTERNODE_COLLATERAL)

        txraw = self.nodes[0].getrawtransaction(txid, True)
        collateral_vout = 0
        for vout_idx in range(0, len(txraw["vout"])):
            vout = txraw["vout"][vout_idx]
            if vout["value"] == MASTERNODE_COLLATERAL:
                collateral_vout = vout_idx
        self.nodes[0].lockunspent(False, [{'txid': txid, 'vout': collateral_vout}])

        # send to same address to reserve some funds for fees
        self.nodes[0].sendtoaddress(address, 0.001)

        ownerAddr = self.nodes[0].getnewaddress()
        votingAddr = self.nodes[0].getnewaddress()
        rewardsAddr = self.nodes[0].getnewaddress()

        port = p2p_port(len(self.nodes) + idx)
        if (idx % 2) == 0:
            self.nodes[0].lockunspent(True, [{'txid': txid, 'vout': collateral_vout}])
            proTxHash = self.nodes[0].protx('register_fund', address, '127.0.0.1:%d' % port, ownerAddr, bls['public'], votingAddr, 0, rewardsAddr, address)
        else:
            self.nodes[0].generate(1)
            proTxHash = self.nodes[0].protx('register', txid, collateral_vout, '127.0.0.1:%d' % port, ownerAddr, bls['public'], votingAddr, 0, rewardsAddr, address)
        self.nodes[0].generate(1)

        self.mninfo.append(MasternodeInfo(proTxHash, ownerAddr, votingAddr, bls['public'], bls['secret'], address, txid, collateral_vout))
        self.sync_all()

        self.log.info("Prepared masternode %d: collateral_txid=%s, collateral_vout=%d, protxHash=%s" % (idx, txid, collateral_vout, proTxHash))

    def remove_mastermode(self, idx):
        mn = self.mninfo[idx]
        rawtx = self.nodes[0].createrawtransaction([{"txid": mn.collateral_txid, "vout": mn.collateral_vout}], {self.nodes[0].getnewaddress(): 999.9999})
        rawtx = self.nodes[0].signrawtransaction(rawtx)
        self.nodes[0].sendrawtransaction(rawtx["hex"])
        self.nodes[0].generate(1)
        self.sync_all()
        self.mninfo.remove(mn)

        self.log.info("Removed masternode %d", idx)

    def prepare_datadirs(self):
        # stop faucet node so that we can copy the datadir
        self.stop_node(0)

        start_idx = len(self.nodes)
        for idx in range(0, self.mn_count):
            copy_datadir(0, idx + start_idx, self.options.tmpdir)

        # restart faucet node
        self.start_node(0)

    def start_masternodes(self):
        self.log.info("Starting %d masternodes", self.mn_count)

        start_idx = len(self.nodes)

        self.add_nodes(self.mn_count)
        executor = ThreadPoolExecutor(max_workers=20)

        def do_start(idx):
            args = ['-masternodeblsprivkey=%s' % self.mninfo[idx].keyOperator] + self.extra_args[idx + start_idx]
            self.start_node(idx + start_idx, extra_args=args)
            self.mninfo[idx].nodeIdx = idx + start_idx
            self.mninfo[idx].node = self.nodes[idx + start_idx]
            force_finish_mnsync(self.mninfo[idx].node)

        def do_connect(idx):
            # Connect to the control node only, masternodes should take care of intra-quorum connections themselves
            connect_nodes(self.mninfo[idx].node, 0)

        jobs = []

        # start up nodes in parallel
        for idx in range(0, self.mn_count):
            jobs.append(executor.submit(do_start, idx))

        # wait for all nodes to start up
        for job in jobs:
            job.result()
        jobs.clear()

        # connect nodes in parallel
        for idx in range(0, self.mn_count):
            jobs.append(executor.submit(do_connect, idx))

        # wait for all nodes to connect
        for job in jobs:
            job.result()
        jobs.clear()

        executor.shutdown()

    def setup_network(self):
        self.log.info("Creating and starting controller node")
        self.add_nodes(1, extra_args=[self.extra_args[0]])
        self.start_node(0)
        required_balance = MASTERNODE_COLLATERAL * self.mn_count + 1
        self.log.info("Generating %d coins" % required_balance)
        while self.nodes[0].getbalance() < required_balance:
            self.bump_mocktime(1)
            set_node_times(self.nodes, self.mocktime)
            self.nodes[0].generate(10)
        num_simple_nodes = self.num_nodes - self.mn_count - 1
        self.log.info("Creating and starting %s simple nodes", num_simple_nodes)
        for i in range(0, num_simple_nodes):
            self.create_simple_node()

        self.log.info("Activating DIP3")
        if not self.fast_dip3_enforcement:
            while self.nodes[0].getblockcount() < 500:
                self.nodes[0].generate(10)
        self.sync_all()

        # create masternodes
        self.prepare_masternodes()
        self.prepare_datadirs()
        self.start_masternodes()

        # non-masternodes where disconnected from the control node during prepare_datadirs,
        # let's reconnect them back to make sure they receive updates
        for i in range(0, num_simple_nodes):
            connect_nodes(self.nodes[i+1], 0)

        self.bump_mocktime(1)
        set_node_times(self.nodes, self.mocktime)
        self.nodes[0].generate(1)
        # sync nodes
        self.sync_all()
        self.bump_mocktime(1)
        set_node_times(self.nodes, self.mocktime)

        mn_info = self.nodes[0].masternodelist("status")
        assert (len(mn_info) == self.mn_count)
        for status in mn_info.values():
            assert (status == 'ENABLED')

    def create_raw_tx(self, node_from, node_to, amount, min_inputs, max_inputs):
        assert (min_inputs <= max_inputs)
        # fill inputs
        inputs = []
        balances = node_from.listunspent()
        in_amount = 0.0
        last_amount = 0.0
        for tx in balances:
            if len(inputs) < min_inputs:
                input = {}
                input["txid"] = tx['txid']
                input['vout'] = tx['vout']
                in_amount += float(tx['amount'])
                inputs.append(input)
            elif in_amount > amount:
                break
            elif len(inputs) < max_inputs:
                input = {}
                input["txid"] = tx['txid']
                input['vout'] = tx['vout']
                in_amount += float(tx['amount'])
                inputs.append(input)
            else:
                input = {}
                input["txid"] = tx['txid']
                input['vout'] = tx['vout']
                in_amount -= last_amount
                in_amount += float(tx['amount'])
                inputs[-1] = input
            last_amount = float(tx['amount'])

        assert (len(inputs) >= min_inputs)
        assert (len(inputs) <= max_inputs)
        assert (in_amount >= amount)
        # fill outputs
        receiver_address = node_to.getnewaddress()
        change_address = node_from.getnewaddress()
        fee = 0.001
        outputs = {}
        outputs[receiver_address] = satoshi_round(amount)
        outputs[change_address] = satoshi_round(in_amount - amount - fee)
        rawtx = node_from.createrawtransaction(inputs, outputs)
        ret = node_from.signrawtransaction(rawtx)
        decoded = node_from.decoderawtransaction(ret['hex'])
        ret = {**decoded, **ret}
        return ret

    def wait_for_tx(self, txid, node, expected=True, timeout=15):
        def check_tx():
            try:
                return node.getrawtransaction(txid)
            except:
                return False
        if wait_until(check_tx, timeout=timeout, sleep=0.5, do_assert=expected) and not expected:
            raise AssertionError("waiting unexpectedly succeeded")

    def wait_for_instantlock(self, txid, node, expected=True, timeout=15):
        def check_instantlock():
            try:
                return node.getrawtransaction(txid, True)["instantlock"]
            except:
                return False
        if wait_until(check_instantlock, timeout=timeout, sleep=0.5, do_assert=expected) and not expected:
            raise AssertionError("waiting unexpectedly succeeded")

    def wait_for_chainlocked_block(self, node, block_hash, expected=True, timeout=15):
        def check_chainlocked_block():
            try:
                block = node.getblock(block_hash)
                return block["confirmations"] > 0 and block["chainlock"]
            except:
                return False
        if wait_until(check_chainlocked_block, timeout=timeout, sleep=0.1, do_assert=expected) and not expected:
            raise AssertionError("waiting unexpectedly succeeded")

    def wait_for_chainlocked_block_all_nodes(self, block_hash, timeout=15):
        for node in self.nodes:
            self.wait_for_chainlocked_block(node, block_hash, timeout=timeout)

    def wait_for_best_chainlock(self, node, block_hash, timeout=15):
        wait_until(lambda: node.getbestchainlock()["blockhash"] == block_hash, timeout=timeout, sleep=0.1)

    def wait_for_sporks_same(self, timeout=30):
        def check_sporks_same():
            sporks = self.nodes[0].spork('show')
            return all(node.spork('show') == sporks for node in self.nodes[1:])
        wait_until(check_sporks_same, timeout=timeout, sleep=0.5)

    def wait_for_quorum_connections(self, expected_connections, nodes, timeout = 60, wait_proc=None):
        def check_quorum_connections():
            all_ok = True
            for node in nodes:
                s = node.quorum("dkgstatus")
                if s["session"] == {}:
                    continue
                if "quorumConnections" not in s:
                    all_ok = False
                    break
                s = s["quorumConnections"]
                if "llmq_test" not in s:
                    all_ok = False
                    break
                cnt = 0
                for c in s["llmq_test"]:
                    if c["connected"]:
                        cnt += 1
                if cnt < expected_connections:
                    all_ok = False
                    break
            if not all_ok and wait_proc is not None:
                wait_proc()
            return all_ok
        wait_until(check_quorum_connections, timeout=timeout, sleep=1)

    def wait_for_masternode_probes(self, expected_probes, mninfos, timeout = 30, wait_proc=None):
        def check_probes():
            for mn in mninfos:
                l = mn.node.protx('list', 'registered', 1)
                cnt = 0
                for mn2 in l:
                    if mn2['proTxHash'] != mn.proTxHash:
                        if mn2['metaInfo']['lastOutboundSuccessElapsed'] <= 60:
                            cnt += 1
                if cnt < expected_probes:
                    if wait_proc is not None:
                        wait_proc()
                    return False
            return True
        wait_until(check_probes, timeout=timeout, sleep=1)

    def wait_for_quorum_phase(self, quorum_hash, phase, expected_member_count, check_received_messages, check_received_messages_count, mninfos, timeout=30, sleep=0.1):
        def check_dkg_session():
            all_ok = True
            member_count = 0
            for mn in mninfos:
                s = mn.node.quorum("dkgstatus")["session"]
                if "llmq_test" not in s:
                    continue
                member_count += 1
                s = s["llmq_test"]
                if s["quorumHash"] != quorum_hash:
                    all_ok = False
                    break
                if "phase" not in s:
                    all_ok = False
                    break
                if s["phase"] != phase:
                    all_ok = False
                    break
                if check_received_messages is not None:
                    if s[check_received_messages] < check_received_messages_count:
                        all_ok = False
                        break
            if all_ok and member_count != expected_member_count:
                return False
            return all_ok
        wait_until(check_dkg_session, timeout=timeout, sleep=sleep)

    def wait_for_quorum_commitment(self, quorum_hash, nodes, timeout = 15):
        def check_dkg_comitments():
            all_ok = True
            for node in nodes:
                s = node.quorum("dkgstatus")
                if "minableCommitments" not in s:
                    all_ok = False
                    break
                s = s["minableCommitments"]
                if "llmq_test" not in s:
                    all_ok = False
                    break
                s = s["llmq_test"]
                if s["quorumHash"] != quorum_hash:
                    all_ok = False
                    break
            return all_ok
        wait_until(check_dkg_comitments, timeout=timeout, sleep=0.1)

    def mine_quorum(self, expected_members=None, expected_connections=2, expected_probes=0, expected_contributions=None, expected_complaints=0, expected_justifications=0, expected_commitments=None, mninfos=None):
        if expected_members is None:
            expected_members = self.llmq_size
        if expected_contributions is None:
            expected_contributions = self.llmq_size
        if expected_commitments is None:
            expected_commitments = self.llmq_size
        if mninfos is None:
            mninfos = self.mninfo

        self.log.info("Mining quorum: expected_members=%d, expected_connections=%d, expected_probes=%d, expected_contributions=%d, expected_complaints=%d, expected_justifications=%d, "
                      "expected_commitments=%d" % (expected_members, expected_connections, expected_probes, expected_contributions, expected_complaints,
                                                   expected_justifications, expected_commitments))

        nodes = [self.nodes[0]] + [mn.node for mn in mninfos]

        quorums = self.nodes[0].quorum("list")

        # move forward to next DKG
        skip_count = 24 - (self.nodes[0].getblockcount() % 24)
        if skip_count != 0:
            self.bump_mocktime(1)
            set_node_times(nodes, self.mocktime)
            self.nodes[0].generate(skip_count)
        sync_blocks(nodes)

        q = self.nodes[0].getbestblockhash()

        self.log.info("Waiting for phase 1 (init)")
        def bump_time():
            self.bump_mocktime(1)
            set_node_times(nodes, self.mocktime)
        self.wait_for_quorum_phase(q, 1, expected_members, None, 0, mninfos)
        self.wait_for_quorum_connections(expected_connections, nodes, wait_proc=bump_time)
        self.wait_for_masternode_probes(expected_probes, mninfos, wait_proc=bump_time)
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(2)
        sync_blocks(nodes)

        self.log.info("Waiting for phase 2 (contribute)")
        self.wait_for_quorum_phase(q, 2, expected_members, "receivedContributions", expected_contributions, mninfos)
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(2)
        sync_blocks(nodes)

        self.log.info("Waiting for phase 3 (complain)")
        self.wait_for_quorum_phase(q, 3, expected_members, "receivedComplaints", expected_complaints, mninfos)
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(2)
        sync_blocks(nodes)

        self.log.info("Waiting for phase 4 (justify)")
        self.wait_for_quorum_phase(q, 4, expected_members, "receivedJustifications", expected_justifications, mninfos)
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(2)
        sync_blocks(nodes)

        self.log.info("Waiting for phase 5 (commit)")
        self.wait_for_quorum_phase(q, 5, expected_members, "receivedPrematureCommitments", expected_commitments, mninfos)
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(2)
        sync_blocks(nodes)

        self.log.info("Waiting for phase 6 (mining)")
        self.wait_for_quorum_phase(q, 6, expected_members, None, 0, mninfos)

        self.log.info("Waiting final commitment")
        self.wait_for_quorum_commitment(q, nodes)

        self.log.info("Mining final commitment")
        self.bump_mocktime(1)
        set_node_times(nodes, self.mocktime)
        self.nodes[0].generate(1)
        while quorums == self.nodes[0].quorum("list"):
            time.sleep(2)
            self.bump_mocktime(1)
            set_node_times(nodes, self.mocktime)
            self.nodes[0].generate(1)
            sync_blocks(nodes)
        new_quorum = self.nodes[0].quorum("list", 1)["llmq_test"][0]
        quorum_info = self.nodes[0].quorum("info", 100, new_quorum)

        # Mine 8 (SIGN_HEIGHT_OFFSET) more blocks to make sure that the new quorum gets eligable for signing sessions
        self.nodes[0].generate(8)

        sync_blocks(nodes)

        self.log.info("New quorum: height=%d, quorumHash=%s, minedBlock=%s" % (quorum_info["height"], new_quorum, quorum_info["minedBlock"]))

        return new_quorum

    def get_quorum_masternodes(self, q):
        qi = self.nodes[0].quorum('info', 100, q)
        result = []
        for m in qi['members']:
            for mn in self.mninfo:
                if mn.proTxHash == m['proTxHash']:
                    result.append(mn)
                    break
        return result

    def wait_for_mnauth(self, node, count, timeout=10):
        def test():
            pi = node.getpeerinfo()
            c = 0
            for p in pi:
                if "verified_proregtx_hash" in p and p["verified_proregtx_hash"] != "":
                    c += 1
            return c >= count
        wait_until(test, timeout=timeout)


class SkipTest(Exception):
    """This exception is raised to skip a test"""
    def __init__(self, message):
        self.message = message