from bitcoin.core import COIN # type: ignore from bitcoin.rpc import RawProxy as BitcoinProxy # type: ignore from bitcoin.rpc import JSONRPCError from contextlib import contextmanager from pathlib import Path from pyln.client import RpcError from pyln.testing.btcproxy import BitcoinRpcProxy from collections import OrderedDict from decimal import Decimal from ephemeral_port_reserve import reserve # type: ignore from pyln.client import LightningRpc from pyln.client import Millisatoshi import json import logging import lzma import math import os import psutil # type: ignore import random import re import shutil import sqlite3 import string import struct import subprocess import sys import threading import time import warnings BITCOIND_CONFIG = { "regtest": 1, "rpcuser": "rpcuser", "rpcpassword": "rpcpass", "fallbackfee": Decimal(1000) / COIN, } LIGHTNINGD_CONFIG = OrderedDict({ "log-level": "debug", "cltv-delta": 6, "cltv-final": 5, "watchtime-blocks": 5, "rescan": 1, 'disable-dns': None, }) FUNDAMOUNT = 10**6 def env(name, default=None): """Access to environment variables Allows access to environment variables, falling back to config.vars (part of c-lightning's `./configure` output), and finally falling back to a default value. """ fname = 'config.vars' if os.path.exists(fname): lines = open(fname, 'r').readlines() config = dict([(line.rstrip().split('=', 1)) for line in lines]) else: config = {} if name in os.environ: return os.environ[name] elif name in config: return config[name] else: return default VALGRIND = env("VALGRIND") == "1" TEST_NETWORK = env("TEST_NETWORK", 'regtest') DEVELOPER = env("DEVELOPER", "0") == "1" TEST_DEBUG = env("TEST_DEBUG", "0") == "1" SLOW_MACHINE = env("SLOW_MACHINE", "0") == "1" DEPRECATED_APIS = env("DEPRECATED_APIS", "0") == "1" TIMEOUT = int(env("TIMEOUT", 180 if SLOW_MACHINE else 60)) EXPERIMENTAL_DUAL_FUND = env("EXPERIMENTAL_DUAL_FUND", "0") == "1" def wait_for(success, timeout=TIMEOUT): start_time = time.time() interval = 0.25 while not success(): time_left = start_time + timeout - time.time() if time_left <= 0: raise ValueError("Timeout while waiting for {}", success) time.sleep(min(interval, time_left)) interval *= 2 if interval > 5: interval = 5 def write_config(filename, opts, regtest_opts=None, section_name='regtest'): with open(filename, 'w') as f: for k, v in opts.items(): f.write("{}={}\n".format(k, v)) if regtest_opts: f.write("[{}]\n".format(section_name)) for k, v in regtest_opts.items(): f.write("{}={}\n".format(k, v)) def only_one(arr): """Many JSON RPC calls return an array; often we only expect a single entry """ assert len(arr) == 1 return arr[0] def sync_blockheight(bitcoind, nodes): height = bitcoind.rpc.getblockchaininfo()['blocks'] for n in nodes: wait_for(lambda: n.rpc.getinfo()['blockheight'] == height) def wait_channel_quiescent(n1, n2): wait_for(lambda: only_one(only_one(n1.rpc.listpeers(n2.info['id'])['peers'])['channels'])['htlcs'] == []) wait_for(lambda: only_one(only_one(n2.rpc.listpeers(n1.info['id'])['peers'])['channels'])['htlcs'] == []) def get_tx_p2wsh_outnum(bitcoind, tx, amount): """Get output number of this tx which is p2wsh of amount""" decoded = bitcoind.rpc.decoderawtransaction(tx, True) for out in decoded['vout']: if out['scriptPubKey']['type'] == 'witness_v0_scripthash': if out['value'] == Decimal(amount) / 10**8: return out['n'] return None class TailableProc(object): """A monitorable process that we can start, stop and tail. This is the base class for the daemons. It allows us to directly tail the processes and react to their output. """ def __init__(self, outputDir=None, verbose=True): self.logs = [] self.logs_cond = threading.Condition(threading.RLock()) self.env = os.environ.copy() self.running = False self.proc = None self.outputDir = outputDir self.logsearch_start = 0 self.err_logs = [] self.prefix = "" # Should we be logging lines we read from stdout? self.verbose = verbose # A filter function that'll tell us whether to filter out the line (not # pass it to the log matcher and not print it to stdout). self.log_filter = lambda line: False def start(self, stdin=None, stdout=None, stderr=None): """Start the underlying process and start monitoring it. """ logging.debug("Starting '%s'", " ".join(self.cmd_line)) self.proc = subprocess.Popen(self.cmd_line, stdin=stdin, stdout=stdout if stdout else subprocess.PIPE, stderr=stderr, env=self.env) self.thread = threading.Thread(target=self.tail) self.thread.daemon = True self.thread.start() self.running = True def save_log(self): if self.outputDir: logpath = os.path.join(self.outputDir, 'log') with open(logpath, 'w') as f: for l in self.logs: f.write(l + '\n') def stop(self, timeout=10): self.save_log() self.proc.terminate() # Now give it some time to react to the signal rc = self.proc.wait(timeout) if rc is None: self.proc.kill() self.proc.wait() self.thread.join() return self.proc.returncode def kill(self): """Kill process without giving it warning.""" self.proc.kill() self.proc.wait() self.thread.join() def tail(self): """Tail the stdout of the process and remember it. Stores the lines of output produced by the process in self.logs and signals that a new line was read so that it can be picked up by consumers. """ for line in iter(self.proc.stdout.readline, ''): if len(line) == 0: break line = line.decode('UTF-8', 'replace').rstrip() if self.log_filter(line): continue if self.verbose: sys.stdout.write("{}: {}\n".format(self.prefix, line)) with self.logs_cond: self.logs.append(line) self.logs_cond.notifyAll() self.running = False self.proc.stdout.close() if self.proc.stderr: for line in iter(self.proc.stderr.readline, ''): if line is None or len(line) == 0: break line = line.rstrip().decode('UTF-8', 'replace') self.err_logs.append(line) self.proc.stderr.close() def is_in_log(self, regex, start=0): """Look for `regex` in the logs.""" ex = re.compile(regex) for l in self.logs[start:]: if ex.search(l): logging.debug("Found '%s' in logs", regex) return l logging.debug("Did not find '%s' in logs", regex) return None def is_in_stderr(self, regex): """Look for `regex` in stderr.""" ex = re.compile(regex) for l in self.err_logs: if ex.search(l): logging.debug("Found '%s' in stderr", regex) return l logging.debug("Did not find '%s' in stderr", regex) return None def wait_for_logs(self, regexs, timeout=TIMEOUT): """Look for `regexs` in the logs. We tail the stdout of the process and look for each regex in `regexs`, starting from last of the previous waited-for log entries (if any). We fail if the timeout is exceeded or if the underlying process exits before all the `regexs` were found. If timeout is None, no time-out is applied. """ logging.debug("Waiting for {} in the logs".format(regexs)) exs = [re.compile(r) for r in regexs] start_time = time.time() pos = self.logsearch_start while True: if timeout is not None and time.time() > start_time + timeout: print("Time-out: can't find {} in logs".format(exs)) for r in exs: if self.is_in_log(r): print("({} was previously in logs!)".format(r)) raise TimeoutError('Unable to find "{}" in logs.'.format(exs)) elif not self.running: raise ValueError('Process died while waiting for logs') with self.logs_cond: if pos >= len(self.logs): self.logs_cond.wait(1) continue for r in exs.copy(): self.logsearch_start = pos + 1 if r.search(self.logs[pos]): logging.debug("Found '%s' in logs", r) exs.remove(r) break if len(exs) == 0: return self.logs[pos] pos += 1 def wait_for_log(self, regex, timeout=TIMEOUT): """Look for `regex` in the logs. Convenience wrapper for the common case of only seeking a single entry. """ return self.wait_for_logs([regex], timeout) class SimpleBitcoinProxy: """Wrapper for BitcoinProxy to reconnect. Long wait times between calls to the Bitcoin RPC could result in `bitcoind` closing the connection, so here we just create throwaway connections. This is easier than to reach into the RPC library to close, reopen and reauth upon failure. """ def __init__(self, btc_conf_file, *args, **kwargs): self.__btc_conf_file__ = btc_conf_file def __getattr__(self, name): if name.startswith('__') and name.endswith('__'): # Python internal stuff raise AttributeError # Create a callable to do the actual call proxy = BitcoinProxy(btc_conf_file=self.__btc_conf_file__) def f(*args): logging.debug("Calling {name} with arguments {args}".format( name=name, args=args )) res = proxy._call(name, *args) logging.debug("Result for {name} call: {res}".format( name=name, res=res, )) return res # Make debuggers show rather than > f.__name__ = name return f class BitcoinD(TailableProc): def __init__(self, bitcoin_dir="/tmp/bitcoind-test", rpcport=None): TailableProc.__init__(self, bitcoin_dir, verbose=False) if rpcport is None: rpcport = reserve() self.bitcoin_dir = bitcoin_dir self.rpcport = rpcport self.prefix = 'bitcoind' regtestdir = os.path.join(bitcoin_dir, 'regtest') if not os.path.exists(regtestdir): os.makedirs(regtestdir) self.cmd_line = [ 'bitcoind', '-datadir={}'.format(bitcoin_dir), '-printtoconsole', '-server', '-logtimestamps', '-nolisten', '-txindex', '-nowallet', '-addresstype=bech32' ] # For up to and including 0.16.1, this needs to be in main section. BITCOIND_CONFIG['rpcport'] = rpcport # For after 0.16.1 (eg. 3f398d7a17f136cd4a67998406ca41a124ae2966), this # needs its own [regtest] section. BITCOIND_REGTEST = {'rpcport': rpcport} self.conf_file = os.path.join(bitcoin_dir, 'bitcoin.conf') write_config(self.conf_file, BITCOIND_CONFIG, BITCOIND_REGTEST) self.rpc = SimpleBitcoinProxy(btc_conf_file=self.conf_file) self.proxies = [] def start(self): TailableProc.start(self) self.wait_for_log("Done loading", timeout=TIMEOUT) logging.info("BitcoinD started") try: self.rpc.createwallet("lightningd-tests") except JSONRPCError: self.rpc.loadwallet("lightningd-tests") def stop(self): for p in self.proxies: p.stop() self.rpc.stop() return TailableProc.stop(self) def get_proxy(self): proxy = BitcoinRpcProxy(self) self.proxies.append(proxy) proxy.start() return proxy # wait_for_mempool can be used to wait for the mempool before generating blocks: # True := wait for at least 1 transation # int > 0 := wait for at least N transactions # 'tx_id' := wait for one transaction id given as a string # ['tx_id1', 'tx_id2'] := wait until all of the specified transaction IDs def generate_block(self, numblocks=1, wait_for_mempool=0): if wait_for_mempool: if isinstance(wait_for_mempool, str): wait_for_mempool = [wait_for_mempool] if isinstance(wait_for_mempool, list): wait_for(lambda: all(txid in self.rpc.getrawmempool() for txid in wait_for_mempool)) else: wait_for(lambda: len(self.rpc.getrawmempool()) >= wait_for_mempool) mempool = self.rpc.getrawmempool() logging.debug("Generating {numblocks}, confirming {lenmempool} transactions: {mempool}".format( numblocks=numblocks, mempool=mempool, lenmempool=len(mempool), )) # As of 0.16, generate() is removed; use generatetoaddress. return self.rpc.generatetoaddress(numblocks, self.rpc.getnewaddress()) def simple_reorg(self, height, shift=0): """ Reorganize chain by creating a fork at height=[height] and re-mine all mempool transactions into [height + shift], where shift >= 0. Returns hashes of generated blocks. Note that tx's that become invalid at [height] (because coin maturity, locktime etc.) are removed from mempool. The length of the new chain will be original + 1 OR original + [shift], whichever is larger. For example: to push tx's backward from height h1 to h2 < h1, use [height]=h2. Or to change the txindex of tx's at height h1: 1. A block at height h2 < h1 should contain a non-coinbase tx that can be pulled forward to h1. 2. Set [height]=h2 and [shift]= h1-h2 """ hashes = [] fee_delta = 1000000 orig_len = self.rpc.getblockcount() old_hash = self.rpc.getblockhash(height) final_len = height + shift if height + shift > orig_len else 1 + orig_len # TODO: raise error for insane args? self.rpc.invalidateblock(old_hash) self.wait_for_log(r'InvalidChainFound: invalid block=.* height={}'.format(height)) memp = self.rpc.getrawmempool() if shift == 0: hashes += self.generate_block(1 + final_len - height) else: for txid in memp: # lower priority (to effective feerate=0) so they are not mined self.rpc.prioritisetransaction(txid, None, -fee_delta) hashes += self.generate_block(shift) for txid in memp: # restore priority so they are mined self.rpc.prioritisetransaction(txid, None, fee_delta) hashes += self.generate_block(1 + final_len - (height + shift)) self.wait_for_log(r'UpdateTip: new best=.* height={}'.format(final_len)) return hashes def getnewaddress(self): return self.rpc.getnewaddress() class ElementsD(BitcoinD): def __init__(self, bitcoin_dir="/tmp/bitcoind-test", rpcport=None): config = BITCOIND_CONFIG.copy() if 'regtest' in config: del config['regtest'] config['chain'] = 'liquid-regtest' BitcoinD.__init__(self, bitcoin_dir, rpcport) self.cmd_line = [ 'elementsd', '-datadir={}'.format(bitcoin_dir), '-printtoconsole', '-server', '-logtimestamps', '-nolisten', '-nowallet', '-validatepegin=0', '-con_blocksubsidy=5000000000', ] conf_file = os.path.join(bitcoin_dir, 'elements.conf') config['rpcport'] = self.rpcport BITCOIND_REGTEST = {'rpcport': self.rpcport} write_config(conf_file, config, BITCOIND_REGTEST, section_name='liquid-regtest') self.conf_file = conf_file self.rpc = SimpleBitcoinProxy(btc_conf_file=self.conf_file) self.prefix = 'elementsd' def getnewaddress(self): """Need to get an address and then make it unconfidential """ addr = self.rpc.getnewaddress() info = self.rpc.getaddressinfo(addr) return info['unconfidential'] class LightningD(TailableProc): def __init__(self, lightning_dir, bitcoindproxy, port=9735, random_hsm=False, node_id=0): TailableProc.__init__(self, lightning_dir) self.executable = 'lightningd' self.lightning_dir = lightning_dir self.port = port self.cmd_prefix = [] self.disconnect_file = None self.rpcproxy = bitcoindproxy self.opts = LIGHTNINGD_CONFIG.copy() opts = { 'lightning-dir': lightning_dir, 'addr': '127.0.0.1:{}'.format(port), 'allow-deprecated-apis': '{}'.format("true" if DEPRECATED_APIS else "false"), 'network': TEST_NETWORK, 'ignore-fee-limits': 'false', 'bitcoin-rpcuser': BITCOIND_CONFIG['rpcuser'], 'bitcoin-rpcpassword': BITCOIND_CONFIG['rpcpassword'], # Make sure we don't touch any existing config files in the user's $HOME 'bitcoin-datadir': lightning_dir, } for k, v in opts.items(): self.opts[k] = v if not os.path.exists(os.path.join(lightning_dir, TEST_NETWORK)): os.makedirs(os.path.join(lightning_dir, TEST_NETWORK)) # Last 32-bytes of final part of dir -> seed. seed = (bytes(re.search('([^/]+)/*$', lightning_dir).group(1), encoding='utf-8') + bytes(32))[:32] if not random_hsm: with open(os.path.join(lightning_dir, TEST_NETWORK, 'hsm_secret'), 'wb') as f: f.write(seed) if DEVELOPER: self.opts['dev-fast-gossip'] = None self.opts['dev-bitcoind-poll'] = 1 self.prefix = 'lightningd-%d' % (node_id) def cleanup(self): # To force blackhole to exit, disconnect file must be truncated! if self.disconnect_file: with open(self.disconnect_file, "w") as f: f.truncate() @property def cmd_line(self): opts = [] for k, v in self.opts.items(): if v is None: opts.append("--{}".format(k)) elif isinstance(v, list): for i in v: opts.append("--{}={}".format(k, i)) else: opts.append("--{}={}".format(k, v)) return self.cmd_prefix + [self.executable] + opts def start(self, stdin=None, stdout=None, stderr=None, wait_for_initialized=True): self.opts['bitcoin-rpcport'] = self.rpcproxy.rpcport TailableProc.start(self, stdin, stdout, stderr) if wait_for_initialized: self.wait_for_log("Server started with public key") logging.info("LightningD started") def wait(self, timeout=10): """Wait for the daemon to stop for up to timeout seconds Returns the returncode of the process, None if the process did not return before the timeout triggers. """ self.proc.wait(timeout) return self.proc.returncode class PrettyPrintingLightningRpc(LightningRpc): """A version of the LightningRpc that pretty-prints calls and results. Useful when debugging based on logs, and less painful to the eyes. It has some overhead since we re-serialize the request and result to json in order to pretty print it. Also validates (optional) schemas for us. """ def __init__(self, socket_path, executor=None, logger=logging, patch_json=True, jsonschemas={}): super().__init__( socket_path, executor, logger, patch_json, ) self.jsonschemas = jsonschemas def call(self, method, payload=None): id = self.next_id self.logger.debug(json.dumps({ "id": id, "method": method, "params": payload }, indent=2)) res = LightningRpc.call(self, method, payload) self.logger.debug(json.dumps({ "id": id, "result": res }, indent=2)) if method in self.jsonschemas: self.jsonschemas[method].validate(res) return res class LightningNode(object): def __init__(self, node_id, lightning_dir, bitcoind, executor, valgrind, may_fail=False, may_reconnect=False, allow_broken_log=False, allow_warning=False, allow_bad_gossip=False, db=None, port=None, disconnect=None, random_hsm=None, options=None, jsonschemas={}, **kwargs): self.bitcoin = bitcoind self.executor = executor self.may_fail = may_fail self.may_reconnect = may_reconnect self.allow_broken_log = allow_broken_log self.allow_bad_gossip = allow_bad_gossip self.allow_warning = allow_warning self.db = db # Assume successful exit self.rc = 0 socket_path = os.path.join(lightning_dir, TEST_NETWORK, "lightning-rpc").format(node_id) self.rpc = PrettyPrintingLightningRpc(socket_path, self.executor, jsonschemas=jsonschemas) self.daemon = LightningD( lightning_dir, bitcoindproxy=bitcoind.get_proxy(), port=port, random_hsm=random_hsm, node_id=node_id ) # If we have a disconnect string, dump it to a file for daemon. if disconnect: self.daemon.disconnect_file = os.path.join(lightning_dir, TEST_NETWORK, "dev_disconnect") with open(self.daemon.disconnect_file, "w") as f: f.write("\n".join(disconnect)) self.daemon.opts["dev-disconnect"] = "dev_disconnect" if DEVELOPER: self.daemon.opts["dev-fail-on-subdaemon-fail"] = None # Don't run --version on every subdaemon if we're valgrinding and slow. if SLOW_MACHINE and VALGRIND: self.daemon.opts["dev-no-version-checks"] = None if os.getenv("DEBUG_SUBD"): self.daemon.opts["dev-debugger"] = os.getenv("DEBUG_SUBD") if valgrind: self.daemon.env["LIGHTNINGD_DEV_NO_BACKTRACE"] = "1" else: # Under valgrind, scanning can access uninitialized mem. self.daemon.env["LIGHTNINGD_DEV_MEMLEAK"] = "1" if not may_reconnect: self.daemon.opts["dev-no-reconnect"] = None if EXPERIMENTAL_DUAL_FUND: self.daemon.opts["experimental-dual-fund"] = None if options is not None: self.daemon.opts.update(options) dsn = db.get_dsn() if dsn is not None: self.daemon.opts['wallet'] = dsn if valgrind: self.daemon.cmd_prefix = [ 'valgrind', '-q', '--trace-children=yes', '--trace-children-skip=*python*,*bitcoin-cli*,*elements-cli*', '--error-exitcode=7', '--log-file={}/valgrind-errors.%p'.format(self.daemon.lightning_dir) ] # Reduce precision of errors, speeding startup and reducing memory greatly: if SLOW_MACHINE: self.daemon.cmd_prefix += ['--read-inline-info=no'] def connect(self, remote_node): self.rpc.connect(remote_node.info['id'], '127.0.0.1', remote_node.daemon.port) def is_connected(self, remote_node): return remote_node.info['id'] in [p['id'] for p in self.rpc.listpeers()['peers']] def openchannel(self, remote_node, capacity=FUNDAMOUNT, addrtype="p2sh-segwit", confirm=True, wait_for_announce=True, connect=True): addr, wallettxid = self.fundwallet(10 * capacity, addrtype) if connect and not self.is_connected(remote_node): self.connect(remote_node) fundingtx = self.rpc.fundchannel(remote_node.info['id'], capacity) # Wait for the funding transaction to be in bitcoind's mempool wait_for(lambda: fundingtx['txid'] in self.bitcoin.rpc.getrawmempool()) if confirm or wait_for_announce: self.bitcoin.generate_block(1) if wait_for_announce: self.bitcoin.generate_block(5) if confirm or wait_for_announce: self.daemon.wait_for_log( r'Funding tx {} depth'.format(fundingtx['txid'])) return {'address': addr, 'wallettxid': wallettxid, 'fundingtx': fundingtx} def fundwallet(self, sats, addrtype="p2sh-segwit"): addr = self.rpc.newaddr(addrtype)[addrtype] txid = self.bitcoin.rpc.sendtoaddress(addr, sats / 10**8) self.bitcoin.generate_block(1) self.daemon.wait_for_log('Owning output .* txid {} CONFIRMED'.format(txid)) return addr, txid def fundbalancedchannel(self, remote_node, total_capacity, announce=True): ''' Creates a perfectly-balanced channel, as all things should be. ''' if isinstance(total_capacity, Millisatoshi): total_capacity = int(total_capacity.to_satoshi()) else: total_capacity = int(total_capacity) self.fundwallet(total_capacity + 10000) if remote_node.config('experimental-dual-fund'): remote_node.fundwallet(total_capacity + 10000) # We cut the total_capacity in half, since the peer's # expected to contribute that same amount chan_capacity = total_capacity // 2 total_capacity = chan_capacity * 2 # Tell the node to equally dual-fund the channel remote_node.rpc.call('funderupdate', {'policy': 'match', 'policy_mod': 100, 'fuzz_percent': 0}) else: chan_capacity = total_capacity self.rpc.connect(remote_node.info['id'], 'localhost', remote_node.port) # Make sure the fundchannel is confirmed. num_tx = len(self.bitcoin.rpc.getrawmempool()) res = self.rpc.fundchannel(remote_node.info['id'], chan_capacity, feerate='slow', minconf=0, announce=announce, push_msat=Millisatoshi(chan_capacity * 500)) wait_for(lambda: len(self.bitcoin.rpc.getrawmempool()) == num_tx + 1) blockid = self.bitcoin.generate_block(1)[0] # Generate the scid. outnum = get_tx_p2wsh_outnum(self.bitcoin, res['tx'], total_capacity) if outnum is None: raise ValueError("no outnum found. capacity {} tx {}".format(total_capacity, res['tx'])) for i, txid in enumerate(self.bitcoin.rpc.getblock(blockid)['tx']): if txid == res['txid']: txnum = i return '{}x{}x{}'.format(self.bitcoin.rpc.getblockcount(), txnum, outnum) def getactivechannels(self): return [c for c in self.rpc.listchannels()['channels'] if c['active']] def db_query(self, query): return self.db.query(query) # Assumes node is stopped! def db_manip(self, query): db = sqlite3.connect(os.path.join(self.daemon.lightning_dir, TEST_NETWORK, "lightningd.sqlite3")) db.row_factory = sqlite3.Row c = db.cursor() c.execute(query) db.commit() c.close() db.close() def is_synced_with_bitcoin(self, info=None): if info is None: info = self.rpc.getinfo() return 'warning_bitcoind_sync' not in info and 'warning_lightningd_sync' not in info def start(self, wait_for_bitcoind_sync=True, stderr=None): self.daemon.start(stderr=stderr) # Cache `getinfo`, we'll be using it a lot self.info = self.rpc.getinfo() # This shortcut is sufficient for our simple tests. self.port = self.info['binding'][0]['port'] if wait_for_bitcoind_sync and not self.is_synced_with_bitcoin(self.info): wait_for(lambda: self.is_synced_with_bitcoin()) def stop(self, timeout=10): """ Attempt to do a clean shutdown, but kill if it hangs """ # Tell the daemon to stop try: # May fail if the process already died self.rpc.stop() except Exception: pass self.rc = self.daemon.wait(timeout) # If it did not stop be more insistent if self.rc is None: self.rc = self.daemon.stop() self.daemon.save_log() self.daemon.cleanup() if self.rc != 0 and not self.may_fail: raise ValueError("Node did not exit cleanly, rc={}".format(self.rc)) else: return self.rc def restart(self, timeout=10, clean=True): """Stop and restart the lightning node. Keyword arguments: timeout: number of seconds to wait for a shutdown clean: whether to issue a `stop` RPC command before killing """ if clean: self.stop(timeout) else: self.daemon.stop() self.start() def fund_channel(self, l2, amount, wait_for_active=True, announce_channel=True): warnings.warn("LightningNode.fund_channel is deprecated in favor of " "LightningNode.fundchannel", category=DeprecationWarning) return self.fundchannel(l2, amount, wait_for_active, announce_channel) def fundchannel(self, l2, amount=FUNDAMOUNT, wait_for_active=True, announce_channel=True, **kwargs): # Give yourself some funds to work with addr = self.rpc.newaddr()['bech32'] def has_funds_on_addr(addr): """Check if the given address has funds in the internal wallet. """ outs = self.rpc.listfunds()['outputs'] addrs = [o['address'] for o in outs] return addr in addrs # We should not have funds on that address yet, we just generated it. assert(not has_funds_on_addr(addr)) self.bitcoin.rpc.sendtoaddress(addr, (amount + 1000000) / 10**8) self.bitcoin.generate_block(1) # Now we should. wait_for(lambda: has_funds_on_addr(addr)) # Now go ahead and open a channel res = self.rpc.fundchannel(l2.info['id'], amount, announce=announce_channel, **kwargs) wait_for(lambda: res['txid'] in self.bitcoin.rpc.getrawmempool()) blockid = self.bitcoin.generate_block(1)[0] for i, txid in enumerate(self.bitcoin.rpc.getblock(blockid)['tx']): if txid == res['txid']: txnum = i scid = "{}x{}x{}".format(self.bitcoin.rpc.getblockcount(), txnum, res['outnum']) if wait_for_active: self.wait_channel_active(scid) l2.wait_channel_active(scid) return scid, res def subd_pid(self, subd, peerid=None): """Get the process id of the given subdaemon, eg channeld or gossipd""" if peerid: ex = re.compile(r'{}-.*{}.*: pid ([0-9]*),' .format(peerid, subd)) else: ex = re.compile('{}-.*: pid ([0-9]*),'.format(subd)) # Make sure we get latest one if it's restarted! for l in reversed(self.daemon.logs): group = ex.search(l) if group: return group.group(1) raise ValueError("No daemon {} found".format(subd)) def channel_state(self, other): """Return the state of the channel to the other node. Returns None if there is no such peer, or a channel hasn't been funded yet. """ peers = self.rpc.listpeers(other.info['id'])['peers'] if not peers or 'channels' not in peers[0]: return None channel = peers[0]['channels'][0] return channel['state'] def get_channel_scid(self, other): """Get the short_channel_id for the channel to the other node. """ peers = self.rpc.listpeers(other.info['id'])['peers'] if not peers or 'channels' not in peers[0]: return None channel = peers[0]['channels'][0] return channel['short_channel_id'] def get_channel_id(self, other): """Get the channel_id for the channel to the other node. """ peers = self.rpc.listpeers(other.info['id'])['peers'] if not peers or 'channels' not in peers[0]: return None channel = peers[0]['channels'][0] return channel['channel_id'] def is_channel_active(self, chanid): channels = self.rpc.listchannels(chanid)['channels'] active = [(c['short_channel_id'], c['channel_flags']) for c in channels if c['active']] return (chanid, 0) in active and (chanid, 1) in active def wait_for_channel_onchain(self, peerid): txid = only_one(only_one(self.rpc.listpeers(peerid)['peers'])['channels'])['scratch_txid'] wait_for(lambda: txid in self.bitcoin.rpc.getrawmempool()) def wait_channel_active(self, chanid): wait_for(lambda: self.is_channel_active(chanid)) # This waits until gossipd sees channel_update in both directions # (or for local channels, at least a local announcement) def wait_for_channel_updates(self, scids): # Could happen in any order... self.daemon.wait_for_logs(['Received channel_update for channel {}/0'.format(c) for c in scids] + ['Received channel_update for channel {}/1'.format(c) for c in scids]) def wait_for_route(self, destination, timeout=30): """ Wait for a route to the destination to become available. """ start_time = time.time() while time.time() < start_time + timeout: try: self.rpc.getroute(destination.info['id'], 1, 1) return True except Exception: time.sleep(1) if time.time() > start_time + timeout: raise ValueError("Error waiting for a route to destination {}".format(destination)) # This helper waits for all HTLCs to settle # `scids` can be a list of strings. If unset wait on all channels. def wait_for_htlcs(self, scids=None): peers = self.rpc.listpeers()['peers'] for p, peer in enumerate(peers): if 'channels' in peer: for c, channel in enumerate(peer['channels']): if scids is not None and channel['short_channel_id'] not in scids: continue if 'htlcs' in channel: wait_for(lambda: len(self.rpc.listpeers()['peers'][p]['channels'][c]['htlcs']) == 0) # This sends money to a directly connected peer def pay(self, dst, amt, label=None): if not label: label = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(20)) # check we are connected dst_id = dst.info['id'] assert len(self.rpc.listpeers(dst_id).get('peers')) == 1 # make an invoice rhash = dst.rpc.invoice(amt, label, label)['payment_hash'] invoices = dst.rpc.listinvoices(label)['invoices'] assert len(invoices) == 1 and invoices[0]['status'] == 'unpaid' routestep = { 'msatoshi': amt, 'id': dst_id, 'delay': 5, 'channel': '1x1x1' # note: can be bogus for 1-hop direct payments } # sendpay is async now self.rpc.sendpay([routestep], rhash) # wait for sendpay to comply result = self.rpc.waitsendpay(rhash) assert(result.get('status') == 'complete') # This helper sends all money to a peer until even 1 msat can't get through. def drain(self, peer): total = 0 msat = 4294967295 # Max payment size in some configs while msat != 0: try: logging.debug("Drain step with size={}".format(msat)) self.pay(peer, msat) total += msat except RpcError as e: logging.debug("Got an exception while draining channel: {}".format(e)) msat //= 2 logging.debug("Draining complete after sending a total of {}msats".format(total)) return total # Note: this feeds through the smoother in update_feerate, so changing # it on a running daemon may not give expected result! def set_feerates(self, feerates, wait_for_effect=True): # (bitcoind returns bitcoin per kb, so these are * 4) def mock_estimatesmartfee(r): params = r['params'] if params == [2, 'CONSERVATIVE']: feerate = feerates[0] * 4 elif params == [6, 'ECONOMICAL']: feerate = feerates[1] * 4 elif params == [12, 'ECONOMICAL']: feerate = feerates[2] * 4 elif params == [100, 'ECONOMICAL']: feerate = feerates[3] * 4 else: warnings.warn("Don't have a feerate set for {}/{}.".format( params[0], params[1], )) feerate = 42 return { 'id': r['id'], 'error': None, 'result': { 'feerate': Decimal(feerate) / 10**8 }, } self.daemon.rpcproxy.mock_rpc('estimatesmartfee', mock_estimatesmartfee) # Technically, this waits until it's called, not until it's processed. # We wait until all three levels have been called. if wait_for_effect: wait_for(lambda: self.daemon.rpcproxy.mock_counts['estimatesmartfee'] >= 4) # force new feerates by restarting and thus skipping slow smoothed process # Note: testnode must be created with: opts={'may_reconnect': True} def force_feerates(self, rate): assert(self.may_reconnect) self.set_feerates([rate] * 4, False) self.restart() self.daemon.wait_for_log('peer_out WIRE_UPDATE_FEE') assert(self.rpc.feerates('perkw')['perkw']['opening'] == rate) def wait_for_onchaind_broadcast(self, name, resolve=None): """Wait for onchaind to drop tx name to resolve (if any)""" if resolve: r = self.daemon.wait_for_log('Broadcasting {} .* to resolve {}' .format(name, resolve)) else: r = self.daemon.wait_for_log('Broadcasting {} .* to resolve ' .format(name)) rawtx = re.search(r'.* \(([0-9a-fA-F]*)\) ', r).group(1) txid = self.bitcoin.rpc.decoderawtransaction(rawtx, True)['txid'] wait_for(lambda: txid in self.bitcoin.rpc.getrawmempool()) def query_gossip(self, querytype, *args, filters=[]): """Generate a gossip query, feed it into this node and get responses in hex""" query = subprocess.run(['devtools/mkquery', querytype] + [str(a) for a in args], check=True, timeout=TIMEOUT, stdout=subprocess.PIPE).stdout.strip() out = subprocess.run(['devtools/gossipwith', '--timeout-after={}'.format(int(math.sqrt(TIMEOUT) + 1)), '{}@localhost:{}'.format(self.info['id'], self.port), query], check=True, timeout=TIMEOUT, stdout=subprocess.PIPE).stdout def passes_filters(hmsg, filters): for f in filters: if hmsg.startswith(f): return False return True msgs = [] while len(out): length = struct.unpack('>H', out[0:2])[0] hmsg = out[2:2 + length].hex() if passes_filters(hmsg, filters): msgs.append(out[2:2 + length].hex()) out = out[2 + length:] return msgs def config(self, config_name): try: opt = self.rpc.listconfigs(config_name) return opt[config_name] except RpcError: return None @contextmanager def flock(directory: Path): """A fair filelock, based on atomic fs operations. """ if not isinstance(directory, Path): directory = Path(directory) d = directory / Path(".locks") os.makedirs(str(d), exist_ok=True) fname = None while True: # Try until we find a filename that doesn't exist yet. try: fname = d / Path("lock-{}".format(time.time())) fd = os.open(str(fname), flags=os.O_CREAT | os.O_EXCL) os.close(fd) break except FileExistsError: time.sleep(0.1) # So now we have a position in the lock, let's check if we are the # next one to go: while True: files = sorted([f.resolve() for f in d.iterdir() if f.is_file()]) # We're queued, so it should at least have us. assert len(files) >= 1 if files[0] == fname: break time.sleep(0.1) # We can continue yield fname # Remove our file, so the next one can go ahead. fname.unlink() class Throttler(object): """Throttles the creation of system-processes to avoid overload. There is no reason to overload the system with too many processes being spawned or run at the same time. It causes timeouts by aggressively preempting processes and swapping if the memory limit is reached. In order to reduce this loss of performance we provide a `wait()` method which will serialize the creation of processes, but also delay if the system load is too high. Notice that technically we are throttling too late, i.e., we react to an overload, but chances are pretty good that some other already running process is about to terminate, and so the overload is short-lived. We throttle when the process object is first created, not when restarted, in order to avoid delaying running tests, which could cause more timeouts. """ def __init__(self, directory: str, target: float = 90): """If specified we try to stick to a load of target (in percent). """ self.target = target self.current_load = self.target # Start slow psutil.cpu_percent() # Prime the internal load metric self.directory = directory def wait(self): start_time = time.time() with flock(self.directory): # We just got the lock, assume someone else just released it self.current_load = 100 while self.load() >= self.target: time.sleep(1) self.current_load = 100 # Back off slightly to avoid triggering right away print("Throttler delayed startup for {} seconds".format(time.time() - start_time)) def load(self): """An exponential moving average of the load """ decay = 0.5 load = psutil.cpu_percent() self.current_load = decay * load + (1 - decay) * self.current_load return self.current_load class NodeFactory(object): """A factory to setup and start `lightningd` daemons. """ def __init__(self, request, testname, bitcoind, executor, directory, db_provider, node_cls, throttler, jsonschemas): if request.node.get_closest_marker("slow_test") and SLOW_MACHINE: self.valgrind = False else: self.valgrind = VALGRIND self.testname = testname self.next_id = 1 self.nodes = [] self.executor = executor self.bitcoind = bitcoind self.directory = directory self.lock = threading.Lock() self.db_provider = db_provider self.node_cls = node_cls self.throttler = throttler self.jsonschemas = jsonschemas def split_options(self, opts): """Split node options from cli options Some options are used to instrument the node wrapper and some are passed to the daemon on the command line. Split them so we know where to use them. """ node_opt_keys = [ 'disconnect', 'may_fail', 'allow_broken_log', 'allow_warning', 'may_reconnect', 'random_hsm', 'feerates', 'wait_for_bitcoind_sync', 'allow_bad_gossip', 'start', ] node_opts = {k: v for k, v in opts.items() if k in node_opt_keys} cli_opts = {k: v for k, v in opts.items() if k not in node_opt_keys} return node_opts, cli_opts def get_next_port(self): with self.lock: return reserve() def get_node_id(self): """Generate a unique numeric ID for a lightning node """ with self.lock: node_id = self.next_id self.next_id += 1 return node_id def get_nodes(self, num_nodes, opts=None): """Start a number of nodes in parallel, each with its own options """ if opts is None: # No opts were passed in, give some dummy opts opts = [{} for _ in range(num_nodes)] elif isinstance(opts, dict): # A single dict was passed in, so we use these opts for all nodes opts = [opts] * num_nodes assert len(opts) == num_nodes jobs = [] for i in range(num_nodes): node_opts, cli_opts = self.split_options(opts[i]) jobs.append(self.executor.submit( self.get_node, options=cli_opts, node_id=self.get_node_id(), **node_opts )) return [j.result() for j in jobs] def get_node(self, node_id=None, options=None, dbfile=None, feerates=(15000, 11000, 7500, 3750), start=True, wait_for_bitcoind_sync=True, may_fail=False, expect_fail=False, cleandir=True, **kwargs): self.throttler.wait() node_id = self.get_node_id() if not node_id else node_id port = self.get_next_port() lightning_dir = os.path.join( self.directory, "lightning-{}/".format(node_id)) if cleandir and os.path.exists(lightning_dir): shutil.rmtree(lightning_dir) # Get the DB backend DSN we should be using for this test and this # node. db = self.db_provider.get_db(os.path.join(lightning_dir, TEST_NETWORK), self.testname, node_id) node = self.node_cls( node_id, lightning_dir, self.bitcoind, self.executor, self.valgrind, db=db, port=port, options=options, may_fail=may_fail or expect_fail, jsonschemas=self.jsonschemas, **kwargs ) # Regtest estimatefee are unusable, so override. node.set_feerates(feerates, False) self.nodes.append(node) if dbfile: out = open(os.path.join(node.daemon.lightning_dir, TEST_NETWORK, 'lightningd.sqlite3'), 'xb') with lzma.open(os.path.join('tests/data', dbfile), 'rb') as f: out.write(f.read()) if start: try: # Capture stderr if we're failing if expect_fail: stderr = subprocess.PIPE else: stderr = None node.start(wait_for_bitcoind_sync, stderr=stderr) except Exception: if expect_fail: return node node.daemon.stop() raise return node def join_nodes(self, nodes, fundchannel=True, fundamount=FUNDAMOUNT, wait_for_announce=False, announce_channels=True) -> None: """Given nodes, connect them in a line, optionally funding a channel""" assert not (wait_for_announce and not announce_channels), "You've asked to wait for an announcement that's not coming. (wait_for_announce=True,announce_channels=False)" connections = [(nodes[i], nodes[i + 1]) for i in range(len(nodes) - 1)] for src, dst in connections: src.rpc.connect(dst.info['id'], 'localhost', dst.port) # If we're returning now, make sure dst all show connections in # getpeers. if not fundchannel: for src, dst in connections: dst.daemon.wait_for_log(r'{}-.*-chan#[0-9]*: Handed peer, entering loop'.format(src.info['id'])) return bitcoind = nodes[0].bitcoin # If we got here, we want to fund channels for src, dst in connections: addr = src.rpc.newaddr()['bech32'] bitcoind.rpc.sendtoaddress(addr, (fundamount + 1000000) / 10**8) bitcoind.generate_block(1) sync_blockheight(bitcoind, nodes) txids = [] for src, dst in connections: txids.append(src.rpc.fundchannel(dst.info['id'], fundamount, announce=announce_channels)['txid']) wait_for(lambda: set(txids).issubset(set(bitcoind.rpc.getrawmempool()))) # Confirm all channels and wait for them to become usable bitcoind.generate_block(1) scids = [] for src, dst in connections: wait_for(lambda: src.channel_state(dst) == 'CHANNELD_NORMAL') scid = src.get_channel_scid(dst) scids.append(scid) # Wait for all channels to be active (locally) for i, n in enumerate(scids): nodes[i].wait_channel_active(scids[i]) nodes[i + 1].wait_channel_active(scids[i]) if not wait_for_announce: return bitcoind.generate_block(5) # Make sure everyone sees all channels: we can cheat and # simply check the ends (since it's a line). nodes[0].wait_channel_active(scids[-1]) nodes[-1].wait_channel_active(scids[0]) # Make sure we have all node announcements, too (just check ends) for n in nodes: for end in (nodes[0], nodes[-1]): wait_for(lambda: 'alias' in only_one(end.rpc.listnodes(n.info['id'])['nodes'])) def line_graph(self, num_nodes, fundchannel=True, fundamount=FUNDAMOUNT, wait_for_announce=False, opts=None, announce_channels=True): """ Create nodes, connect them and optionally fund channels. """ nodes = self.get_nodes(num_nodes, opts=opts) self.join_nodes(nodes, fundchannel, fundamount, wait_for_announce, announce_channels) return nodes def killall(self, expected_successes): """Returns true if every node we expected to succeed actually succeeded""" unexpected_fail = False err_msgs = [] for i in range(len(self.nodes)): leaks = None # leak detection upsets VALGRIND by reading uninitialized mem. # If it's dead, we'll catch it below. if not self.valgrind and DEVELOPER: try: # This also puts leaks in log. leaks = self.nodes[i].rpc.dev_memleak()['leaks'] except Exception: pass try: self.nodes[i].stop() except Exception: if expected_successes[i]: unexpected_fail = True if leaks is not None and len(leaks) != 0: unexpected_fail = True err_msgs.append("Node {} has memory leaks: {}".format( self.nodes[i].daemon.lightning_dir, json.dumps(leaks, sort_keys=True, indent=4) )) return not unexpected_fail, err_msgs