import asyncio import shutil import copy import tempfile from decimal import Decimal import os from contextlib import contextmanager from collections import defaultdict import logging import concurrent from concurrent import futures import unittest from typing import Iterable, NamedTuple, Tuple, List, Dict from aiorpcx import timeout_after, TaskTimeout from electrum_ecc import ECPrivkey import electrum import electrum.trampoline from electrum import bitcoin from electrum import util from electrum import constants from electrum.network import Network from electrum import simple_config, lnutil from electrum.lnaddr import lnencode, LnAddr, lndecode from electrum.bitcoin import COIN, sha256 from electrum.transaction import Transaction from electrum.util import NetworkRetryManager, bfh, OldTaskGroup, EventListener, InvoiceError from electrum.lnpeer import Peer from electrum.lntransport import LNPeerAddr from electrum.crypto import privkey_to_pubkey from electrum.lnutil import Keypair, PaymentFailure, LnFeatures, HTLCOwner, PaymentFeeBudget from electrum.lnchannel import ChannelState, PeerState, Channel from electrum.lnrouter import LNPathFinder, PathEdge, LNPathInconsistent from electrum.channel_db import ChannelDB from electrum.lnworker import LNWallet, NoPathFound, SentHtlcInfo, PaySession from electrum.lnmsg import encode_msg, decode_msg from electrum import lnmsg from electrum.logging import console_stderr_handler, Logger from electrum.lnworker import PaymentInfo, RECEIVED from electrum.lnonion import OnionFailureCode, OnionRoutingFailure from electrum.lnutil import UpdateAddHtlc from electrum.lnutil import LOCAL, REMOTE from electrum.invoices import PR_PAID, PR_UNPAID from electrum.interface import GracefulDisconnect from electrum.simple_config import SimpleConfig from .test_lnchannel import create_test_channels from . import ElectrumTestCase def keypair(): priv = ECPrivkey.generate_random_key().get_secret_bytes() k1 = Keypair( pubkey=privkey_to_pubkey(priv), privkey=priv) return k1 @contextmanager def noop_lock(): yield class MockNetwork: def __init__(self, tx_queue, *, config: SimpleConfig): self.callbacks = defaultdict(list) self.lnwatcher = None self.interface = None self.config = config self.asyncio_loop = util.get_asyncio_loop() self.channel_db = ChannelDB(self) self.channel_db.data_loaded.set() self.path_finder = LNPathFinder(self.channel_db) self.lngossip = MockLNGossip() self.tx_queue = tx_queue self._blockchain = MockBlockchain() @property def callback_lock(self): return noop_lock() def get_local_height(self): return self.blockchain().height() def blockchain(self): return self._blockchain async def broadcast_transaction(self, tx): if self.tx_queue: await self.tx_queue.put(tx) async def try_broadcasting(self, tx, name): await self.broadcast_transaction(tx) class MockBlockchain: def height(self): # Let's return a non-zero, realistic height. # 0 might hide relative vs abs locktime confusion bugs. return 600_000 def is_tip_stale(self): return False class MockADB: def add_transaction(self, tx): pass class MockWallet: receive_requests = {} adb = MockADB() def get_request(self, key): pass def get_key_for_receive_request(self, x): pass def set_label(self, x, y): pass def save_db(self): pass def is_lightning_backup(self): return False def is_mine(self, addr): return True def get_fingerprint(self): return '' class MockLNGossip: def get_sync_progress_estimate(self): return None, None, None class MockLNWallet(Logger, EventListener, NetworkRetryManager[LNPeerAddr]): MPP_EXPIRY = 2 # HTLC timestamps are cast to int, so this cannot be 1 PAYMENT_TIMEOUT = 120 TIMEOUT_SHUTDOWN_FAIL_PENDING_HTLCS = 0 MPP_SPLIT_PART_FRACTION = 1 # this disables the forced splitting MPP_SPLIT_PART_MINAMT_MSAT = 5_000_000 def __init__(self, *, local_keypair: Keypair, chans: Iterable['Channel'], tx_queue, name): self.name = name Logger.__init__(self) NetworkRetryManager.__init__(self, max_retry_delay_normal=1, init_retry_delay_normal=1) self.node_keypair = local_keypair self.payment_secret_key = os.urandom(32) # does not need to be deterministic in tests self._user_dir = tempfile.mkdtemp(prefix="electrum-lnpeer-test-") self.config = SimpleConfig({}, read_user_dir_function=lambda: self._user_dir) self.network = MockNetwork(tx_queue, config=self.config) self.taskgroup = OldTaskGroup() self.lnwatcher = None self.swap_manager = None self.listen_server = None self._channels = {chan.channel_id: chan for chan in chans} self.payment_info = {} self.logs = defaultdict(list) self.wallet = MockWallet() self.features = LnFeatures(0) self.features |= LnFeatures.OPTION_DATA_LOSS_PROTECT_OPT self.features |= LnFeatures.OPTION_UPFRONT_SHUTDOWN_SCRIPT_OPT self.features |= LnFeatures.VAR_ONION_OPT self.features |= LnFeatures.PAYMENT_SECRET_OPT self.features |= LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM self.features |= LnFeatures.OPTION_CHANNEL_TYPE_OPT self.features |= LnFeatures.OPTION_SCID_ALIAS_OPT self.pending_payments = defaultdict(asyncio.Future) for chan in chans: chan.lnworker = self self._peers = {} # bytes -> Peer # used in tests self.enable_htlc_settle = True self.enable_htlc_forwarding = True self.received_mpp_htlcs = dict() self._paysessions = dict() self.sent_htlcs_info = dict() self.sent_buckets = defaultdict(set) self.active_forwardings = {} self.forwarding_failures = {} self.inflight_payments = set() self.preimages = {} self.stopping_soon = False self.downstream_to_upstream_htlc = {} self.hold_invoice_callbacks = {} self.payment_bundles = [] # lists of hashes. todo:persist self.config.INITIAL_TRAMPOLINE_FEE_LEVEL = 0 self.logger.info(f"created LNWallet[{name}] with nodeID={local_keypair.pubkey.hex()}") def clear_invoices_cache(self): pass def pay_scheduled_invoices(self): pass def get_invoice_status(self, key): pass @property def lock(self): return noop_lock() @property def channel_db(self): return self.network.channel_db if self.network else None def uses_trampoline(self): return not bool(self.channel_db) @property def channels(self): return self._channels @property def peers(self): return self._peers def get_channel_by_short_id(self, short_channel_id): with self.lock: for chan in self._channels.values(): if chan.short_channel_id == short_channel_id: return chan def channel_state_changed(self, chan): pass def save_channel(self, chan): print("Ignoring channel save") def diagnostic_name(self): return self.name async def stop(self): await LNWallet.stop(self) if self.channel_db: self.channel_db.stop() await self.channel_db.stopped_event.wait() async def create_routes_from_invoice(self, amount_msat: int, decoded_invoice: LnAddr, *, full_path=None): paysession = PaySession( payment_hash=decoded_invoice.paymenthash, payment_secret=decoded_invoice.payment_secret, initial_trampoline_fee_level=0, invoice_features=decoded_invoice.get_features(), r_tags=decoded_invoice.get_routing_info('r'), min_final_cltv_delta=decoded_invoice.get_min_final_cltv_delta(), amount_to_pay=amount_msat, invoice_pubkey=decoded_invoice.pubkey.serialize(), uses_trampoline=False, use_two_trampolines=False, ) payment_key = decoded_invoice.paymenthash + decoded_invoice.payment_secret self._paysessions[payment_key] = paysession return [r async for r in self.create_routes_for_payment( amount_msat=amount_msat, paysession=paysession, full_path=full_path, budget=PaymentFeeBudget.default(invoice_amount_msat=amount_msat, config=self.config), )] get_payments = LNWallet.get_payments get_payment_secret = LNWallet.get_payment_secret get_payment_info = LNWallet.get_payment_info save_payment_info = LNWallet.save_payment_info set_invoice_status = LNWallet.set_invoice_status set_request_status = LNWallet.set_request_status set_payment_status = LNWallet.set_payment_status get_payment_status = LNWallet.get_payment_status check_mpp_status = LNWallet.check_mpp_status htlc_fulfilled = LNWallet.htlc_fulfilled htlc_failed = LNWallet.htlc_failed save_preimage = LNWallet.save_preimage get_preimage = LNWallet.get_preimage create_route_for_single_htlc = LNWallet.create_route_for_single_htlc create_routes_for_payment = LNWallet.create_routes_for_payment _check_invoice = LNWallet._check_invoice pay_to_route = LNWallet.pay_to_route pay_to_node = LNWallet.pay_to_node pay_invoice = LNWallet.pay_invoice force_close_channel = LNWallet.force_close_channel schedule_force_closing = LNWallet.schedule_force_closing get_first_timestamp = lambda self: 0 on_peer_successfully_established = LNWallet.on_peer_successfully_established get_channel_by_id = LNWallet.get_channel_by_id channels_for_peer = LNWallet.channels_for_peer calc_routing_hints_for_invoice = LNWallet.calc_routing_hints_for_invoice get_channels_for_receiving = LNWallet.get_channels_for_receiving handle_error_code_from_failed_htlc = LNWallet.handle_error_code_from_failed_htlc is_trampoline_peer = LNWallet.is_trampoline_peer wait_for_received_pending_htlcs_to_get_removed = LNWallet.wait_for_received_pending_htlcs_to_get_removed #on_event_proxy_set = LNWallet.on_event_proxy_set _decode_channel_update_msg = LNWallet._decode_channel_update_msg _handle_chanupd_from_failed_htlc = LNWallet._handle_chanupd_from_failed_htlc is_forwarded_htlc = LNWallet.is_forwarded_htlc notify_upstream_peer = LNWallet.notify_upstream_peer _force_close_channel = LNWallet._force_close_channel suggest_splits = LNWallet.suggest_splits register_hold_invoice = LNWallet.register_hold_invoice unregister_hold_invoice = LNWallet.unregister_hold_invoice add_payment_info_for_hold_invoice = LNWallet.add_payment_info_for_hold_invoice update_mpp_with_received_htlc = LNWallet.update_mpp_with_received_htlc set_mpp_resolution = LNWallet.set_mpp_resolution is_mpp_amount_reached = LNWallet.is_mpp_amount_reached get_first_timestamp_of_mpp = LNWallet.get_first_timestamp_of_mpp bundle_payments = LNWallet.bundle_payments get_payment_bundle = LNWallet.get_payment_bundle _get_payment_key = LNWallet._get_payment_key save_forwarding_failure = LNWallet.save_forwarding_failure get_forwarding_failure = LNWallet.get_forwarding_failure maybe_cleanup_forwarding = LNWallet.maybe_cleanup_forwarding current_target_feerate_per_kw = LNWallet.current_target_feerate_per_kw current_low_feerate_per_kw = LNWallet.current_low_feerate_per_kw maybe_cleanup_mpp = LNWallet.maybe_cleanup_mpp class MockTransport: def __init__(self, name): self.queue = asyncio.Queue() # incoming messages self._name = name self.peer_addr = None def name(self): return self._name async def read_messages(self): while True: data = await self.queue.get() if isinstance(data, asyncio.Event): # to artificially delay messages await data.wait() continue yield data class NoFeaturesTransport(MockTransport): """ This answers the init message with a init that doesn't signal any features. Used for testing that we require DATA_LOSS_PROTECT. """ def send_bytes(self, data): decoded = decode_msg(data) print(decoded) if decoded[0] == 'init': self.queue.put_nowait(encode_msg('init', lflen=1, gflen=1, localfeatures=b"\x00", globalfeatures=b"\x00")) class PutIntoOthersQueueTransport(MockTransport): def __init__(self, keypair, name): super().__init__(name) self.other_mock_transport = None self.privkey = keypair.privkey def send_bytes(self, data): self.other_mock_transport.queue.put_nowait(data) def transport_pair(k1, k2, name1, name2): t1 = PutIntoOthersQueueTransport(k1, name1) t2 = PutIntoOthersQueueTransport(k2, name2) t1.other_mock_transport = t2 t2.other_mock_transport = t1 return t1, t2 class PeerInTests(Peer): DELAY_INC_MSG_PROCESSING_SLEEP = 0 # disable rate-limiting high_fee_channel = { 'local_balance_msat': 10 * bitcoin.COIN * 1000 // 2, 'remote_balance_msat': 10 * bitcoin.COIN * 1000 // 2, 'local_base_fee_msat': 500_000, 'local_fee_rate_millionths': 500, 'remote_base_fee_msat': 500_000, 'remote_fee_rate_millionths': 500, } low_fee_channel = { 'local_balance_msat': 10 * bitcoin.COIN * 1000 // 2, 'remote_balance_msat': 10 * bitcoin.COIN * 1000 // 2, 'local_base_fee_msat': 1_000, 'local_fee_rate_millionths': 1, 'remote_base_fee_msat': 1_000, 'remote_fee_rate_millionths': 1, } depleted_channel = { 'local_balance_msat': 0, 'remote_balance_msat': 10 * bitcoin.COIN * 1000, 'local_base_fee_msat': 1_000, 'local_fee_rate_millionths': 1, 'remote_base_fee_msat': 1_000, 'remote_fee_rate_millionths': 1, } _GRAPH_DEFINITIONS = { 'square_graph': { 'alice': { 'channels': { # we should use copies of channel definitions if # we want to independently alter them in a test 'bob': high_fee_channel.copy(), 'carol': low_fee_channel.copy(), }, }, 'bob': { 'channels': { 'dave': high_fee_channel.copy(), }, 'config': { SimpleConfig.EXPERIMENTAL_LN_FORWARD_PAYMENTS: True, SimpleConfig.EXPERIMENTAL_LN_FORWARD_TRAMPOLINE_PAYMENTS: True, }, }, 'carol': { 'channels': { 'dave': low_fee_channel.copy(), }, 'config': { SimpleConfig.EXPERIMENTAL_LN_FORWARD_PAYMENTS: True, SimpleConfig.EXPERIMENTAL_LN_FORWARD_TRAMPOLINE_PAYMENTS: True, }, }, 'dave': { }, } } class Graph(NamedTuple): workers: Dict[str, MockLNWallet] peers: Dict[Tuple[str, str], Peer] channels: Dict[Tuple[str, str], Channel] class PaymentDone(Exception): pass class PaymentTimeout(Exception): pass class SuccessfulTest(Exception): pass class TestPeer(ElectrumTestCase): TESTNET = True @classmethod def setUpClass(cls): super().setUpClass() console_stderr_handler.setLevel(logging.DEBUG) def setUp(self): super().setUp() self.GRAPH_DEFINITIONS = copy.deepcopy(_GRAPH_DEFINITIONS) self._lnworkers_created = [] # type: List[MockLNWallet] async def asyncTearDown(self): # clean up lnworkers async with OldTaskGroup() as group: for lnworker in self._lnworkers_created: await group.spawn(lnworker.stop()) for lnworker in self._lnworkers_created: shutil.rmtree(lnworker._user_dir) self._lnworkers_created.clear() electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {} await super().asyncTearDown() @staticmethod def prepare_invoice( w2: MockLNWallet, # receiver *, amount_msat=100_000_000, include_routing_hints=False, payment_preimage: bytes = None, payment_hash: bytes = None, invoice_features: LnFeatures = None, min_final_cltv_delta: int = None, ) -> Tuple[LnAddr, str]: amount_btc = amount_msat/Decimal(COIN*1000) if payment_preimage is None and not payment_hash: payment_preimage = os.urandom(32) if payment_hash is None: payment_hash = sha256(payment_preimage) info = PaymentInfo(payment_hash, amount_msat, RECEIVED, PR_UNPAID) if payment_preimage: w2.save_preimage(payment_hash, payment_preimage) w2.save_payment_info(info) if include_routing_hints: routing_hints = w2.calc_routing_hints_for_invoice(amount_msat) else: routing_hints = [] trampoline_hints = [] if invoice_features is None: invoice_features = w2.features.for_invoice() if invoice_features.supports(LnFeatures.PAYMENT_SECRET_OPT): payment_secret = w2.get_payment_secret(payment_hash) else: payment_secret = None if min_final_cltv_delta is None: min_final_cltv_delta = lnutil.MIN_FINAL_CLTV_DELTA_FOR_INVOICE lnaddr1 = LnAddr( paymenthash=payment_hash, amount=amount_btc, tags=[ ('c', min_final_cltv_delta), ('d', 'coffee'), ('9', invoice_features), ] + routing_hints, payment_secret=payment_secret, ) invoice = lnencode(lnaddr1, w2.node_keypair.privkey) lnaddr2 = lndecode(invoice) # unlike lnaddr1, this now has a pubkey set return lnaddr2, invoice async def _activate_trampoline(self, w: MockLNWallet): if w.network.channel_db: w.network.channel_db.stop() await w.network.channel_db.stopped_event.wait() w.network.channel_db = None def prepare_recipient(self, w2, payment_hash, test_hold_invoice, test_failure): if not test_hold_invoice and not test_failure: return preimage = bytes.fromhex(w2.preimages.pop(payment_hash.hex())) if test_hold_invoice: async def cb(payment_hash): if not test_failure: w2.save_preimage(payment_hash, preimage) else: raise OnionRoutingFailure(code=OnionFailureCode.INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS, data=b'') w2.register_hold_invoice(payment_hash, cb) class TestPeerDirect(TestPeer): def prepare_peers( self, alice_channel: Channel, bob_channel: Channel, *, k1: Keypair = None, k2: Keypair = None, ): if k1 is None: k1 = keypair() if k2 is None: k2 = keypair() alice_channel.node_id = k2.pubkey bob_channel.node_id = k1.pubkey alice_channel.storage['node_id'] = alice_channel.node_id bob_channel.storage['node_id'] = bob_channel.node_id t1, t2 = transport_pair(k1, k2, alice_channel.name, bob_channel.name) q1, q2 = asyncio.Queue(), asyncio.Queue() w1 = MockLNWallet(local_keypair=k1, chans=[alice_channel], tx_queue=q1, name=bob_channel.name) w2 = MockLNWallet(local_keypair=k2, chans=[bob_channel], tx_queue=q2, name=alice_channel.name) self._lnworkers_created.extend([w1, w2]) p1 = PeerInTests(w1, k2.pubkey, t1) p2 = PeerInTests(w2, k1.pubkey, t2) w1._peers[p1.pubkey] = p1 w2._peers[p2.pubkey] = p2 # mark_open won't work if state is already OPEN. # so set it to FUNDED alice_channel._state = ChannelState.FUNDED bob_channel._state = ChannelState.FUNDED # this populates the channel graph: p1.mark_open(alice_channel) p2.mark_open(bob_channel) return p1, p2, w1, w2, q1, q2 async def test_reestablish(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) for chan in (alice_channel, bob_channel): chan.peer_state = PeerState.DISCONNECTED async def reestablish(): await asyncio.gather( p1.reestablish_channel(alice_channel), p2.reestablish_channel(bob_channel)) self.assertEqual(alice_channel.peer_state, PeerState.GOOD) self.assertEqual(bob_channel.peer_state, PeerState.GOOD) gath.cancel() gath = asyncio.gather(reestablish(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p1.htlc_switch()) with self.assertRaises(asyncio.CancelledError): await gath async def test_reestablish_with_old_state(self): async def f(alice_slow: bool, bob_slow: bool): random_seed = os.urandom(32) alice_channel, bob_channel = create_test_channels(random_seed=random_seed) alice_channel_0, bob_channel_0 = create_test_channels(random_seed=random_seed) # these are identical p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) lnaddr, pay_req = self.prepare_invoice(w2) async def pay(): result, log = await w1.pay_invoice(pay_req) self.assertEqual(result, True) gath.cancel() gath = asyncio.gather(pay(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(asyncio.CancelledError): await gath p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel_0, bob_channel) for chan in (alice_channel_0, bob_channel): chan.peer_state = PeerState.DISCONNECTED async def alice_sends_reest(): if alice_slow: await asyncio.sleep(0.05) await p1.reestablish_channel(alice_channel_0) async def bob_sends_reest(): if bob_slow: await asyncio.sleep(0.05) await p2.reestablish_channel(bob_channel) with self.assertRaises(GracefulDisconnect): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await group.spawn(alice_sends_reest) await group.spawn(bob_sends_reest) self.assertEqual(alice_channel_0.peer_state, PeerState.BAD) self.assertEqual(alice_channel_0._state, ChannelState.WE_ARE_TOXIC) self.assertEqual(bob_channel._state, ChannelState.FORCE_CLOSING) with self.subTest(msg="both fast"): # FIXME: we want to test the case where both Alice and Bob sends channel-reestablish before # receiving what the other sent. This is not a reliable way to do that... await f(alice_slow=False, bob_slow=False) with self.subTest(msg="alice is slow"): await f(alice_slow=True, bob_slow=False) with self.subTest(msg="bob is slow"): await f(alice_slow=False, bob_slow=True) @staticmethod def _send_fake_htlc(peer: Peer, chan: Channel) -> UpdateAddHtlc: htlc = UpdateAddHtlc(amount_msat=10000, payment_hash=os.urandom(32), cltv_abs=999, timestamp=1) htlc = chan.add_htlc(htlc) peer.send_message( "update_add_htlc", channel_id=chan.channel_id, id=htlc.htlc_id, cltv_expiry=htlc.cltv_abs, amount_msat=htlc.amount_msat, payment_hash=htlc.payment_hash, onion_routing_packet=1366 * b"0", ) return htlc async def test_reestablish_replay_messages_rev_then_sig(self): """ See https://github.com/lightning/bolts/pull/810#issue-728299277 Rev then Sig A B <---add----- ----add----> <---sig----- ----rev----x ----sig----x A needs to retransmit: ----rev--> (note that 'add' can be first too) ----add--> ----sig--> """ chan_AB, chan_BA = create_test_channels() k1, k2 = keypair(), keypair() # note: we don't start peer.htlc_switch() so that the fake htlcs are left alone. async def f(): p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2) async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p2._message_loop()) await p1.initialized await p2.initialized self._send_fake_htlc(p2, chan_BA) self._send_fake_htlc(p1, chan_AB) p2.transport.queue.put_nowait(asyncio.Event()) # break Bob's incoming pipe self.assertTrue(p2.maybe_send_commitment(chan_BA)) await p1.received_commitsig_event.wait() await group.cancel_remaining() # simulating disconnection. recreate transports. self.logger.info("simulating disconnection. recreating transports.") p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2) for chan in (chan_AB, chan_BA): chan.peer_state = PeerState.DISCONNECTED async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p2._message_loop()) with self.assertLogs('electrum', level='INFO') as logs: async with OldTaskGroup() as group2: await group2.spawn(p1.reestablish_channel(chan_AB)) await group2.spawn(p2.reestablish_channel(chan_BA)) self.assertTrue(any(("alice->bob" in msg and "replaying a revoke_and_ack first" in msg) for msg in logs.output)) self.assertTrue(any(("alice->bob" in msg and "replayed 2 unacked messages. ['update_add_htlc', 'commitment_signed']" in msg) for msg in logs.output)) self.assertEqual(chan_AB.peer_state, PeerState.GOOD) self.assertEqual(chan_BA.peer_state, PeerState.GOOD) await group.cancel_remaining() raise SuccessfulTest() with self.assertRaises(SuccessfulTest): await f() async def test_reestablish_replay_messages_sig_then_rev(self): """ See https://github.com/lightning/bolts/pull/810#issue-728299277 Sig then Rev A B <---add----- ----add----> ----sig----x <---sig----- ----rev----x A needs to retransmit: ----add--> ----sig--> ----rev--> """ chan_AB, chan_BA = create_test_channels() k1, k2 = keypair(), keypair() # note: we don't start peer.htlc_switch() so that the fake htlcs are left alone. async def f(): p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2) async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p2._message_loop()) await p1.initialized await p2.initialized self._send_fake_htlc(p2, chan_BA) self._send_fake_htlc(p1, chan_AB) p2.transport.queue.put_nowait(asyncio.Event()) # break Bob's incoming pipe self.assertTrue(p1.maybe_send_commitment(chan_AB)) self.assertTrue(p2.maybe_send_commitment(chan_BA)) await p1.received_commitsig_event.wait() await group.cancel_remaining() # simulating disconnection. recreate transports. self.logger.info("simulating disconnection. recreating transports.") p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2) for chan in (chan_AB, chan_BA): chan.peer_state = PeerState.DISCONNECTED async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p2._message_loop()) with self.assertLogs('electrum', level='INFO') as logs: async with OldTaskGroup() as group2: await group2.spawn(p1.reestablish_channel(chan_AB)) await group2.spawn(p2.reestablish_channel(chan_BA)) self.assertTrue(any(("alice->bob" in msg and "replaying a revoke_and_ack last" in msg) for msg in logs.output)) self.assertTrue(any(("alice->bob" in msg and "replayed 2 unacked messages. ['update_add_htlc', 'commitment_signed']" in msg) for msg in logs.output)) self.assertEqual(chan_AB.peer_state, PeerState.GOOD) self.assertEqual(chan_BA.peer_state, PeerState.GOOD) await group.cancel_remaining() raise SuccessfulTest() with self.assertRaises(SuccessfulTest): await f() async def _test_simple_payment( self, test_trampoline: bool, test_hold_invoice=False, test_failure=False, test_bundle=False, test_bundle_timeout=False ): """Alice pays Bob a single HTLC via direct channel.""" alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def pay(lnaddr, pay_req): self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr.paymenthash)) result, log = await w1.pay_invoice(pay_req) if result is True: self.assertEqual(PR_PAID, w2.get_payment_status(lnaddr.paymenthash)) raise PaymentDone() else: raise PaymentFailure() lnaddr, pay_req = self.prepare_invoice(w2) self.prepare_recipient(w2, lnaddr.paymenthash, test_hold_invoice, test_failure) if test_bundle: lnaddr2, pay_req2 = self.prepare_invoice(w2) w2.bundle_payments([lnaddr.paymenthash, lnaddr2.paymenthash]) if test_trampoline: await self._activate_trampoline(w1) # declare bob as trampoline node electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = { 'bob': LNPeerAddr(host="127.0.0.1", port=9735, pubkey=w2.node_keypair.pubkey), } async def f(): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await asyncio.sleep(0.01) invoice_features = lnaddr.get_features() self.assertFalse(invoice_features.supports(LnFeatures.BASIC_MPP_OPT)) await group.spawn(pay(lnaddr, pay_req)) if test_bundle and not test_bundle_timeout: await group.spawn(pay(lnaddr2, pay_req2)) await f() async def test_simple_payment_success(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentDone): await self._test_simple_payment(test_trampoline=test_trampoline) async def test_simple_payment_failure(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentFailure): await self._test_simple_payment(test_trampoline=test_trampoline, test_failure=True) async def test_payment_bundle(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentDone): await self._test_simple_payment(test_trampoline=test_trampoline, test_bundle=True) async def test_payment_bundle_timeout(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentFailure): await self._test_simple_payment(test_trampoline=test_trampoline, test_bundle=True, test_bundle_timeout=True) async def test_simple_payment_success_with_hold_invoice(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentDone): await self._test_simple_payment(test_trampoline=test_trampoline, test_hold_invoice=True) async def test_simple_payment_failure_with_hold_invoice(self): for test_trampoline in [False, True]: with self.assertRaises(PaymentFailure): await self._test_simple_payment(test_trampoline=test_trampoline, test_hold_invoice=True, test_failure=True) async def test_check_invoice_before_payment(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def try_paying_some_invoices(): # feature bits: unknown even fbit invoice_features = w2.features.for_invoice() | (1 << 990) # add undefined even fbit lnaddr, pay_req = self.prepare_invoice(w2, invoice_features=invoice_features) with self.assertRaises(lnutil.UnknownEvenFeatureBits): result, log = await w1.pay_invoice(pay_req) # feature bits: not all transitive dependencies are set invoice_features = LnFeatures((1 << 8) + (1 << 17)) lnaddr, pay_req = self.prepare_invoice(w2, invoice_features=invoice_features) with self.assertRaises(lnutil.IncompatibleOrInsaneFeatures): result, log = await w1.pay_invoice(pay_req) # too large CLTV lnaddr, pay_req = self.prepare_invoice(w2, min_final_cltv_delta=10**6) with self.assertRaises(InvoiceError): result, log = await w1.pay_invoice(pay_req) raise SuccessfulTest() async def f(): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await asyncio.sleep(0.01) await group.spawn(try_paying_some_invoices()) with self.assertRaises(SuccessfulTest): await f() async def test_payment_race(self): """Alice and Bob pay each other simultaneously. They both send 'update_add_htlc' and receive each other's update before sending 'commitment_signed'. Neither party should fulfill the respective HTLCs until those are irrevocably committed to. """ alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def pay(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # prep _maybe_send_commitment1 = p1.maybe_send_commitment _maybe_send_commitment2 = p2.maybe_send_commitment lnaddr2, pay_req2 = self.prepare_invoice(w2) lnaddr1, pay_req1 = self.prepare_invoice(w1) # alice sends htlc BUT NOT COMMITMENT_SIGNED p1.maybe_send_commitment = lambda x: None route1 = (await w1.create_routes_from_invoice(lnaddr2.get_amount_msat(), decoded_invoice=lnaddr2))[0][0].route paysession1 = w1._paysessions[lnaddr2.paymenthash + lnaddr2.payment_secret] shi1 = SentHtlcInfo( route=route1, payment_secret_orig=lnaddr2.payment_secret, payment_secret_bucket=lnaddr2.payment_secret, amount_msat=lnaddr2.get_amount_msat(), bucket_msat=lnaddr2.get_amount_msat(), amount_receiver_msat=lnaddr2.get_amount_msat(), trampoline_fee_level=None, trampoline_route=None, ) await w1.pay_to_route( sent_htlc_info=shi1, paysession=paysession1, min_final_cltv_delta=lnaddr2.get_min_final_cltv_delta(), ) p1.maybe_send_commitment = _maybe_send_commitment1 # bob sends htlc BUT NOT COMMITMENT_SIGNED p2.maybe_send_commitment = lambda x: None route2 = (await w2.create_routes_from_invoice(lnaddr1.get_amount_msat(), decoded_invoice=lnaddr1))[0][0].route paysession2 = w2._paysessions[lnaddr1.paymenthash + lnaddr1.payment_secret] shi2 = SentHtlcInfo( route=route2, payment_secret_orig=lnaddr1.payment_secret, payment_secret_bucket=lnaddr1.payment_secret, amount_msat=lnaddr1.get_amount_msat(), bucket_msat=lnaddr1.get_amount_msat(), amount_receiver_msat=lnaddr1.get_amount_msat(), trampoline_fee_level=None, trampoline_route=None, ) await w2.pay_to_route( sent_htlc_info=shi2, paysession=paysession2, min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(), ) p2.maybe_send_commitment = _maybe_send_commitment2 # sleep a bit so that they both receive msgs sent so far await asyncio.sleep(0.2) # now they both send COMMITMENT_SIGNED p1.maybe_send_commitment(alice_channel) p2.maybe_send_commitment(bob_channel) htlc_log1 = await paysession1.sent_htlcs_q.get() self.assertTrue(htlc_log1.success) htlc_log2 = await paysession2.sent_htlcs_q.get() self.assertTrue(htlc_log2.success) raise PaymentDone() async def f(): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await asyncio.sleep(0.01) await group.spawn(pay()) with self.assertRaises(PaymentDone): await f() #@unittest.skip("too expensive") async def test_payments_stresstest(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) alice_init_balance_msat = alice_channel.balance(HTLCOwner.LOCAL) bob_init_balance_msat = bob_channel.balance(HTLCOwner.LOCAL) num_payments = 50 payment_value_msat = 10_000_000 # make it large enough so that there are actually HTLCs on the ctx max_htlcs_in_flight = asyncio.Semaphore(5) async def single_payment(pay_req): async with max_htlcs_in_flight: await w1.pay_invoice(pay_req) async def many_payments(): async with OldTaskGroup() as group: for i in range(num_payments): lnaddr, pay_req = self.prepare_invoice(w2, amount_msat=payment_value_msat) await group.spawn(single_payment(pay_req)) gath.cancel() gath = asyncio.gather(many_payments(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(asyncio.CancelledError): await gath self.assertEqual(alice_init_balance_msat - num_payments * payment_value_msat, alice_channel.balance(HTLCOwner.LOCAL)) self.assertEqual(alice_init_balance_msat - num_payments * payment_value_msat, bob_channel.balance(HTLCOwner.REMOTE)) self.assertEqual(bob_init_balance_msat + num_payments * payment_value_msat, bob_channel.balance(HTLCOwner.LOCAL)) self.assertEqual(bob_init_balance_msat + num_payments * payment_value_msat, alice_channel.balance(HTLCOwner.REMOTE)) async def test_payment_recv_mpp_confusion1(self): """Regression test for https://github.com/spesmilo/electrum/security/advisories/GHSA-8r85-vp7r-hjxf""" # This test checks that the following attack does not work: # - Bob creates invoice1: 1 BTC, H1, S1 # - Bob creates invoice2: 1 BTC, H2, S2; both given to attacker to pay # - Alice sends htlc1: 0.1 BTC, H1, S1 (total_msat=1 BTC) # - Alice sends htlc2: 0.9 BTC, H2, S1 (total_msat=1 BTC) # - Bob(victim) reveals preimage for H1 and fulfills htlc1 (fails other) alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def pay(): self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr1.paymenthash)) self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr2.paymenthash)) route = (await w1.create_routes_from_invoice(amount_msat=1000, decoded_invoice=lnaddr1))[0][0].route p1.pay( route=route, chan=alice_channel, amount_msat=1000, total_msat=lnaddr1.get_amount_msat(), payment_hash=lnaddr1.paymenthash, min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(), payment_secret=lnaddr1.payment_secret, ) p1.pay( route=route, chan=alice_channel, amount_msat=lnaddr1.get_amount_msat() - 1000, total_msat=lnaddr1.get_amount_msat(), payment_hash=lnaddr2.paymenthash, min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(), payment_secret=lnaddr1.payment_secret, ) while nhtlc_success + nhtlc_failed < 2: await htlc_resolved.wait() self.assertEqual(0, nhtlc_success) self.assertEqual(2, nhtlc_failed) raise SuccessfulTest() w2.features |= LnFeatures.BASIC_MPP_OPT lnaddr1, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000) lnaddr2, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000) self.assertTrue(lnaddr1.get_features().supports(LnFeatures.BASIC_MPP_OPT)) self.assertTrue(lnaddr2.get_features().supports(LnFeatures.BASIC_MPP_OPT)) async def f(): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await asyncio.sleep(0.01) await group.spawn(pay()) htlc_resolved = asyncio.Event() nhtlc_success = 0 nhtlc_failed = 0 async def on_htlc_fulfilled(*args): htlc_resolved.set() htlc_resolved.clear() nonlocal nhtlc_success nhtlc_success += 1 async def on_htlc_failed(*args): htlc_resolved.set() htlc_resolved.clear() nonlocal nhtlc_failed nhtlc_failed += 1 util.register_callback(on_htlc_fulfilled, ["htlc_fulfilled"]) util.register_callback(on_htlc_failed, ["htlc_failed"]) try: with self.assertRaises(SuccessfulTest): await f() finally: util.unregister_callback(on_htlc_fulfilled) util.unregister_callback(on_htlc_failed) async def test_payment_recv_mpp_confusion2(self): """Regression test for https://github.com/spesmilo/electrum/security/advisories/GHSA-8r85-vp7r-hjxf""" # This test checks that the following attack does not work: # - Bob creates invoice: 1 BTC # - Alice sends htlc1: 0.1 BTC (total_msat=0.2 BTC) # - Alice sends htlc2: 0.1 BTC (total_msat=1 BTC) # - Bob(victim) reveals preimage and fulfills htlc2 (fails other) alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def pay(): self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr1.paymenthash)) route = (await w1.create_routes_from_invoice(amount_msat=1000, decoded_invoice=lnaddr1))[0][0].route p1.pay( route=route, chan=alice_channel, amount_msat=1000, total_msat=2000, payment_hash=lnaddr1.paymenthash, min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(), payment_secret=lnaddr1.payment_secret, ) p1.pay( route=route, chan=alice_channel, amount_msat=1000, total_msat=lnaddr1.get_amount_msat(), payment_hash=lnaddr1.paymenthash, min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(), payment_secret=lnaddr1.payment_secret, ) while nhtlc_success + nhtlc_failed < 2: await htlc_resolved.wait() self.assertEqual(0, nhtlc_success) self.assertEqual(2, nhtlc_failed) raise SuccessfulTest() w2.features |= LnFeatures.BASIC_MPP_OPT lnaddr1, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000) self.assertTrue(lnaddr1.get_features().supports(LnFeatures.BASIC_MPP_OPT)) async def f(): async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) await asyncio.sleep(0.01) await group.spawn(pay()) htlc_resolved = asyncio.Event() nhtlc_success = 0 nhtlc_failed = 0 async def on_htlc_fulfilled(*args): htlc_resolved.set() htlc_resolved.clear() nonlocal nhtlc_success nhtlc_success += 1 async def on_htlc_failed(*args): htlc_resolved.set() htlc_resolved.clear() nonlocal nhtlc_failed nhtlc_failed += 1 util.register_callback(on_htlc_fulfilled, ["htlc_fulfilled"]) util.register_callback(on_htlc_failed, ["htlc_failed"]) try: with self.assertRaises(SuccessfulTest): await f() finally: util.unregister_callback(on_htlc_fulfilled) util.unregister_callback(on_htlc_failed) async def test_legacy_shutdown_low(self): await self._test_shutdown(alice_fee=100, bob_fee=150) async def test_legacy_shutdown_high(self): await self._test_shutdown(alice_fee=2000, bob_fee=100) async def test_modern_shutdown_with_overlap(self): await self._test_shutdown( alice_fee=1, bob_fee=200, alice_fee_range={'min_fee_satoshis': 1, 'max_fee_satoshis': 10}, bob_fee_range={'min_fee_satoshis': 10, 'max_fee_satoshis': 300}) ## This test works but it is too slow (LN_P2P_NETWORK_TIMEOUT) ## because tests do not use a proper LNWorker object #def test_modern_shutdown_no_overlap(self): # self.assertRaises(Exception, lambda: asyncio.run( # self._test_shutdown( # alice_fee=1, # bob_fee=200, # alice_fee_range={'min_fee_satoshis': 1, 'max_fee_satoshis': 10}, # bob_fee_range={'min_fee_satoshis': 50, 'max_fee_satoshis': 300}) # )) async def _test_shutdown(self, alice_fee, bob_fee, alice_fee_range=None, bob_fee_range=None): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) w1.network.config.TEST_SHUTDOWN_FEE = alice_fee w2.network.config.TEST_SHUTDOWN_FEE = bob_fee if alice_fee_range is not None: w1.network.config.TEST_SHUTDOWN_FEE_RANGE = alice_fee_range else: w1.network.config.TEST_SHUTDOWN_LEGACY = True if bob_fee_range is not None: w2.network.config.TEST_SHUTDOWN_FEE_RANGE = bob_fee_range else: w2.network.config.TEST_SHUTDOWN_LEGACY = True w2.enable_htlc_settle = False lnaddr, pay_req = self.prepare_invoice(w2) async def pay(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # alice sends htlc route = (await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr))[0][0].route p1.pay(route=route, chan=alice_channel, amount_msat=lnaddr.get_amount_msat(), total_msat=lnaddr.get_amount_msat(), payment_hash=lnaddr.paymenthash, min_final_cltv_delta=lnaddr.get_min_final_cltv_delta(), payment_secret=lnaddr.payment_secret) # alice closes await p1.close_channel(alice_channel.channel_id) gath.cancel() async def set_settle(): await asyncio.sleep(0.1) w2.enable_htlc_settle = True gath = asyncio.gather(pay(), set_settle(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(asyncio.CancelledError): await gath async def test_warning(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def action(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) await p1.send_warning(alice_channel.channel_id, 'be warned!', close_connection=True) gath = asyncio.gather(action(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(GracefulDisconnect): await gath async def test_error(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def action(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) await p1.send_error(alice_channel.channel_id, 'some error happened!', force_close_channel=True) assert alice_channel.is_closed() gath.cancel() gath = asyncio.gather(action(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(GracefulDisconnect): await gath async def test_close_upfront_shutdown_script(self): alice_channel, bob_channel = create_test_channels() # create upfront shutdown script for bob, alice doesn't use upfront # shutdown script bob_uss_pub = privkey_to_pubkey(os.urandom(32)) bob_uss_addr = bitcoin.pubkey_to_address('p2wpkh', bob_uss_pub.hex()) bob_uss = bitcoin.address_to_script(bob_uss_addr) # bob commits to close to bob_uss alice_channel.config[HTLCOwner.REMOTE].upfront_shutdown_script = bob_uss # but bob closes to some receiving address, which we achieve by not # setting the upfront shutdown script in the channel config bob_channel.config[HTLCOwner.LOCAL].upfront_shutdown_script = b'' p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel) w1.network.config.FEE_EST_DYNAMIC = False w2.network.config.FEE_EST_DYNAMIC = False w1.network.config.FEE_EST_STATIC_FEERATE = 5000 w2.network.config.FEE_EST_STATIC_FEERATE = 1000 async def test(): async def close(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # bob closes channel with different shutdown script await p1.close_channel(alice_channel.channel_id) self.fail("p1.close_channel should have raised above!") async def main_loop(peer): async with peer.taskgroup as group: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) coros = [close(), main_loop(p1), main_loop(p2)] gath = asyncio.gather(*coros) await gath with self.assertRaises(GracefulDisconnect): await test() # check that neither party broadcast a closing tx (as it was not even signed) self.assertEqual(0, q1.qsize()) self.assertEqual(0, q2.qsize()) # -- new scenario: # bob sends the same upfront_shutdown_script has he announced alice_channel.config[HTLCOwner.REMOTE].upfront_shutdown_script = bob_uss bob_channel.config[HTLCOwner.LOCAL].upfront_shutdown_script = bob_uss p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel) w1.network.config.FEE_EST_DYNAMIC = False w2.network.config.FEE_EST_DYNAMIC = False w1.network.config.FEE_EST_STATIC_FEERATE = 5000 w2.network.config.FEE_EST_STATIC_FEERATE = 1000 async def test(): async def close(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) await p1.close_channel(alice_channel.channel_id) gath.cancel() async def main_loop(peer): async with peer.taskgroup as group: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) coros = [close(), main_loop(p1), main_loop(p2)] gath = asyncio.gather(*coros) await gath with self.assertRaises(asyncio.CancelledError): await test() # check if p1 has broadcast the closing tx, and if it pays to Bob's uss self.assertEqual(1, q1.qsize()) closing_tx = q1.get_nowait() # type: Transaction self.assertEqual(2, len(closing_tx.outputs())) self.assertEqual(1, len(closing_tx.get_output_idxs_from_address(bob_uss_addr))) async def test_channel_usage_after_closing(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel) lnaddr, pay_req = self.prepare_invoice(w2) lnaddr = w1._check_invoice(pay_req) shi = (await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr))[0][0] route, amount_msat = shi.route, shi.amount_msat assert amount_msat == lnaddr.get_amount_msat() await w1.force_close_channel(alice_channel.channel_id) # check if a tx (commitment transaction) was broadcasted: assert q1.qsize() == 1 with self.assertRaises(NoPathFound) as e: await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr) peer = w1.peers[route[0].node_id] # AssertionError is ok since we shouldn't use old routes, and the # route finding should fail when channel is closed async def f(): shi = SentHtlcInfo( route=route, payment_secret_orig=lnaddr.payment_secret, payment_secret_bucket=lnaddr.payment_secret, amount_msat=amount_msat, bucket_msat=amount_msat, amount_receiver_msat=amount_msat, trampoline_fee_level=None, trampoline_route=None, ) paysession = w1._paysessions[lnaddr.paymenthash + lnaddr.payment_secret] pay = w1.pay_to_route( sent_htlc_info=shi, paysession=paysession, min_final_cltv_delta=lnaddr.get_min_final_cltv_delta(), ) await asyncio.gather(pay, p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch()) with self.assertRaises(PaymentFailure): await f() async def test_sending_weird_messages_that_should_be_ignored(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def send_weird_messages(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # peer1 sends known message with trailing garbage # BOLT-01 says peer2 should ignore trailing garbage raw_msg1 = encode_msg('ping', num_pong_bytes=4, byteslen=4) + bytes(range(55)) p1.transport.send_bytes(raw_msg1) await asyncio.sleep(0.05) # peer1 sends unknown 'odd-type' message # BOLT-01 says peer2 should ignore whole message raw_msg2 = (43333).to_bytes(length=2, byteorder="big") + bytes(range(55)) p1.transport.send_bytes(raw_msg2) await asyncio.sleep(0.05) raise SuccessfulTest() async def f(): async with OldTaskGroup() as group: for peer in [p1, p2]: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in [p1, p2]: await peer.initialized await group.spawn(send_weird_messages()) with self.assertRaises(SuccessfulTest): await f() async def test_sending_weird_messages__unknown_even_type(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def send_weird_messages(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # peer1 sends unknown 'even-type' message # BOLT-01 says peer2 should close the connection raw_msg2 = (43334).to_bytes(length=2, byteorder="big") + bytes(range(55)) p1.transport.send_bytes(raw_msg2) await asyncio.sleep(0.05) failing_task = None async def f(): nonlocal failing_task async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) failing_task = await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) for peer in [p1, p2]: await peer.initialized await group.spawn(send_weird_messages()) with self.assertRaises(GracefulDisconnect): await f() self.assertTrue(isinstance(failing_task.exception().__cause__, lnmsg.UnknownMandatoryMsgType)) async def test_sending_weird_messages__known_msg_with_insufficient_length(self): alice_channel, bob_channel = create_test_channels() p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel) async def send_weird_messages(): await util.wait_for2(p1.initialized, 1) await util.wait_for2(p2.initialized, 1) # peer1 sends known message with insufficient length for the contents # BOLT-01 says peer2 should fail the connection raw_msg1 = encode_msg('ping', num_pong_bytes=4, byteslen=4)[:-1] p1.transport.send_bytes(raw_msg1) await asyncio.sleep(0.05) failing_task = None async def f(): nonlocal failing_task async with OldTaskGroup() as group: await group.spawn(p1._message_loop()) await group.spawn(p1.htlc_switch()) failing_task = await group.spawn(p2._message_loop()) await group.spawn(p2.htlc_switch()) for peer in [p1, p2]: await peer.initialized await group.spawn(send_weird_messages()) with self.assertRaises(GracefulDisconnect): await f() self.assertTrue(isinstance(failing_task.exception().__cause__, lnmsg.UnexpectedEndOfStream)) class TestPeerForwarding(TestPeer): def prepare_chans_and_peers_in_graph(self, graph_definition) -> Graph: keys = {k: keypair() for k in graph_definition} txs_queues = {k: asyncio.Queue() for k in graph_definition} channels = {} # type: Dict[Tuple[str, str], Channel] transports = {} workers = {} # type: Dict[str, MockLNWallet] peers = {} # create channels for a, definition in graph_definition.items(): for b, channel_def in definition.get('channels', {}).items(): channel_ab, channel_ba = create_test_channels( alice_name=a, bob_name=b, alice_pubkey=keys[a].pubkey, bob_pubkey=keys[b].pubkey, local_msat=channel_def['local_balance_msat'], remote_msat=channel_def['remote_balance_msat'], ) channels[(a, b)], channels[(b, a)] = channel_ab, channel_ba transport_ab, transport_ba = transport_pair(keys[a], keys[b], channel_ab.name, channel_ba.name) transports[(a, b)], transports[(b, a)] = transport_ab, transport_ba # set fees channel_ab.forwarding_fee_proportional_millionths = channel_def['local_fee_rate_millionths'] channel_ab.forwarding_fee_base_msat = channel_def['local_base_fee_msat'] channel_ba.forwarding_fee_proportional_millionths = channel_def['remote_fee_rate_millionths'] channel_ba.forwarding_fee_base_msat = channel_def['remote_base_fee_msat'] # create workers and peers for a, definition in graph_definition.items(): channels_of_node = [c for k, c in channels.items() if k[0] == a] workers[a] = MockLNWallet(local_keypair=keys[a], chans=channels_of_node, tx_queue=txs_queues[a], name=a) self._lnworkers_created.extend(list(workers.values())) # create peers for ab in channels.keys(): peers[ab] = Peer(workers[ab[0]], keys[ab[1]].pubkey, transports[ab]) # add peers to workers for a, w in workers.items(): for ab, peer_ab in peers.items(): if ab[0] == a: w._peers[peer_ab.pubkey] = peer_ab # set forwarding properties for a, definition in graph_definition.items(): for property in definition.get('config', {}).items(): workers[a].network.config.set_key(*property) # mark_open won't work if state is already OPEN. # so set it to FUNDED for channel_ab in channels.values(): channel_ab._state = ChannelState.FUNDED # this populates the channel graph: for ab, peer_ab in peers.items(): peer_ab.mark_open(channels[ab]) graph = Graph( workers=workers, peers=peers, channels=channels, ) for a in workers: print(f"{a:5s}: {keys[a].pubkey}") print(f" {keys[a].pubkey.hex()}") return graph async def test_payment_multihop(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) peers = graph.peers.values() async def pay(lnaddr, pay_req): self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) result, log = await graph.workers['alice'].pay_invoice(pay_req) self.assertTrue(result) self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) raise PaymentDone() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True) await group.spawn(pay(lnaddr, pay_req)) with self.assertRaises(PaymentDone): await f() async def test_payment_multihop_with_preselected_path(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) peers = graph.peers.values() async def pay(pay_req): with self.subTest(msg="bad path: edges do not chain together"): path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey, end_node=graph.workers['carol'].node_keypair.pubkey, short_channel_id=graph.channels[('alice', 'bob')].short_channel_id), PathEdge(start_node=graph.workers['bob'].node_keypair.pubkey, end_node=graph.workers['dave'].node_keypair.pubkey, short_channel_id=graph.channels['bob', 'dave'].short_channel_id)] with self.assertRaises(LNPathInconsistent): await graph.workers['alice'].pay_invoice(pay_req, full_path=path) with self.subTest(msg="bad path: last node id differs from invoice pubkey"): path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey, end_node=graph.workers['bob'].node_keypair.pubkey, short_channel_id=graph.channels[('alice', 'bob')].short_channel_id)] with self.assertRaises(LNPathInconsistent): await graph.workers['alice'].pay_invoice(pay_req, full_path=path) with self.subTest(msg="good path"): path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey, end_node=graph.workers['bob'].node_keypair.pubkey, short_channel_id=graph.channels[('alice', 'bob')].short_channel_id), PathEdge(start_node=graph.workers['bob'].node_keypair.pubkey, end_node=graph.workers['dave'].node_keypair.pubkey, short_channel_id=graph.channels['bob', 'dave'].short_channel_id)] result, log = await graph.workers['alice'].pay_invoice(pay_req, full_path=path) self.assertTrue(result) self.assertEqual( [edge.short_channel_id for edge in path], [edge.short_channel_id for edge in log[0].route]) raise PaymentDone() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True) await group.spawn(pay(pay_req)) with self.assertRaises(PaymentDone): await f() async def test_payment_multihop_temp_node_failure(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) graph.workers['bob'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True graph.workers['carol'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True peers = graph.peers.values() async def pay(lnaddr, pay_req): self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) result, log = await graph.workers['alice'].pay_invoice(pay_req) self.assertFalse(result) self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code) raise PaymentDone() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True) await group.spawn(pay(lnaddr, pay_req)) with self.assertRaises(PaymentDone): await f() async def test_payment_multihop_route_around_failure(self): # Alice will pay Dave. Alice first tries A->C->D route, due to lower fees, but Carol # will fail the htlc and get blacklisted. Alice will then try A->B->D and succeed. graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) graph.workers['carol'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True peers = graph.peers.values() async def pay(lnaddr, pay_req): self.assertEqual(500000000000, graph.channels[('alice', 'bob')].balance(LOCAL)) self.assertEqual(500000000000, graph.channels[('dave', 'bob')].balance(LOCAL)) self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=2) self.assertEqual(2, len(log)) self.assertTrue(result) self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) self.assertEqual([graph.channels[('alice', 'carol')].short_channel_id, graph.channels[('carol', 'dave')].short_channel_id], [edge.short_channel_id for edge in log[0].route]) self.assertEqual([graph.channels[('alice', 'bob')].short_channel_id, graph.channels[('bob', 'dave')].short_channel_id], [edge.short_channel_id for edge in log[1].route]) self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code) self.assertEqual(499899450000, graph.channels[('alice', 'bob')].balance(LOCAL)) await asyncio.sleep(0.2) # wait for COMMITMENT_SIGNED / REVACK msgs to update balance self.assertEqual(500100000000, graph.channels[('dave', 'bob')].balance(LOCAL)) raise PaymentDone() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True) invoice_features = lnaddr.get_features() self.assertFalse(invoice_features.supports(LnFeatures.BASIC_MPP_OPT)) await group.spawn(pay(lnaddr, pay_req)) with self.assertRaises(PaymentDone): await f() async def test_refuse_to_forward_htlc_that_corresponds_to_payreq_we_created(self): # This test checks that the following attack does not work: # - Bob creates payment request with HASH1, for 1 BTC; and gives the payreq to Alice # - Alice sends htlc A->B->D, for 100k sat, with HASH1 # - Bob must not release the preimage of HASH1 graph_def = self.GRAPH_DEFINITIONS['square_graph'] graph_def.pop('carol') graph_def['alice']['channels'].pop('carol') # now graph is linear: A <-> B <-> D graph = self.prepare_chans_and_peers_in_graph(graph_def) peers = graph.peers.values() async def pay(): lnaddr1, pay_req1 = self.prepare_invoice( graph.workers['bob'], amount_msat=100_000_000_000, ) lnaddr2, pay_req2 = self.prepare_invoice( graph.workers['dave'], amount_msat=100_000_000, payment_hash=lnaddr1.paymenthash, # Dave is cooperating with Alice, and he reuses Bob's hash include_routing_hints=True, ) with self.subTest(msg="try to make Bob forward in legacy (non-trampoline) mode"): result, log = await graph.workers['alice'].pay_invoice(pay_req2, attempts=1) self.assertFalse(result) self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code) self.assertEqual(None, graph.workers['alice'].get_preimage(lnaddr1.paymenthash)) with self.subTest(msg="try to make Bob forward in trampoline mode"): # declare Bob as trampoline forwarding node electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = { graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey), } await self._activate_trampoline(graph.workers['alice']) result, log = await graph.workers['alice'].pay_invoice(pay_req2, attempts=5) self.assertFalse(result) self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code) self.assertEqual(None, graph.workers['alice'].get_preimage(lnaddr1.paymenthash)) raise SuccessfulTest() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized await group.spawn(pay()) with self.assertRaises(SuccessfulTest): await f() async def test_payment_with_temp_channel_failure_and_liquidity_hints(self): # prepare channels such that a temporary channel failure happens at c->d graph_definition = self.GRAPH_DEFINITIONS['square_graph'] graph_definition['alice']['channels']['carol']['local_balance_msat'] = 200_000_000 graph_definition['alice']['channels']['carol']['remote_balance_msat'] = 200_000_000 graph_definition['carol']['channels']['dave']['local_balance_msat'] = 50_000_000 graph_definition['carol']['channels']['dave']['remote_balance_msat'] = 200_000_000 graph_definition['alice']['channels']['bob']['local_balance_msat'] = 200_000_000 graph_definition['alice']['channels']['bob']['remote_balance_msat'] = 200_000_000 graph_definition['bob']['channels']['dave']['local_balance_msat'] = 200_000_000 graph_definition['bob']['channels']['dave']['remote_balance_msat'] = 200_000_000 graph = self.prepare_chans_and_peers_in_graph(graph_definition) # the payment happens in two attempts: # 1. along a->c->d due to low fees with temp channel failure: # with chanupd: ORPHANED, private channel update # c->d gets a liquidity hint and gets blocked # 2. along a->b->d with success amount_to_pay = 100_000_000 peers = graph.peers.values() async def pay(lnaddr, pay_req): self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=3) self.assertTrue(result) self.assertEqual(2, len(log)) self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash)) self.assertEqual(OnionFailureCode.TEMPORARY_CHANNEL_FAILURE, log[0].failure_msg.code) liquidity_hints = graph.workers['alice'].network.path_finder.liquidity_hints pubkey_a = graph.workers['alice'].node_keypair.pubkey pubkey_b = graph.workers['bob'].node_keypair.pubkey pubkey_c = graph.workers['carol'].node_keypair.pubkey pubkey_d = graph.workers['dave'].node_keypair.pubkey # check liquidity hints for failing route: hint_ac = liquidity_hints.get_hint(graph.channels[('alice', 'carol')].short_channel_id) hint_cd = liquidity_hints.get_hint(graph.channels[('carol', 'dave')].short_channel_id) self.assertEqual(amount_to_pay, hint_ac.can_send(pubkey_a < pubkey_c)) self.assertEqual(None, hint_ac.cannot_send(pubkey_a < pubkey_c)) self.assertEqual(None, hint_cd.can_send(pubkey_c < pubkey_d)) self.assertEqual(amount_to_pay, hint_cd.cannot_send(pubkey_c < pubkey_d)) # check liquidity hints for successful route: hint_ab = liquidity_hints.get_hint(graph.channels[('alice', 'bob')].short_channel_id) hint_bd = liquidity_hints.get_hint(graph.channels[('bob', 'dave')].short_channel_id) self.assertEqual(amount_to_pay, hint_ab.can_send(pubkey_a < pubkey_b)) self.assertEqual(None, hint_ab.cannot_send(pubkey_a < pubkey_b)) self.assertEqual(amount_to_pay, hint_bd.can_send(pubkey_b < pubkey_d)) self.assertEqual(None, hint_bd.cannot_send(pubkey_b < pubkey_d)) raise PaymentDone() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], amount_msat=amount_to_pay, include_routing_hints=True) await group.spawn(pay(lnaddr, pay_req)) with self.assertRaises(PaymentDone): await f() async def _run_mpp(self, graph, kwargs): """Tests a multipart payment scenario for failing and successful cases.""" self.assertEqual(500_000_000_000, graph.channels[('alice', 'bob')].balance(LOCAL)) self.assertEqual(500_000_000_000, graph.channels[('alice', 'carol')].balance(LOCAL)) amount_to_pay = 600_000_000_000 peers = graph.peers.values() async def pay( attempts=1, alice_uses_trampoline=False, bob_forwarding=True, mpp_invoice=True, disable_trampoline_receiving=False, test_hold_invoice=False, test_failure=False, ): alice_w = graph.workers['alice'] bob_w = graph.workers['bob'] carol_w = graph.workers['carol'] dave_w = graph.workers['dave'] if mpp_invoice: dave_w.features |= LnFeatures.BASIC_MPP_OPT if disable_trampoline_receiving: dave_w.features &= ~LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM if not bob_forwarding: bob_w.enable_htlc_forwarding = False if alice_uses_trampoline: await self._activate_trampoline(alice_w) else: assert alice_w.network.channel_db is not None lnaddr, pay_req = self.prepare_invoice(dave_w, include_routing_hints=True, amount_msat=amount_to_pay) self.prepare_recipient(dave_w, lnaddr.paymenthash, test_hold_invoice, test_failure) self.assertEqual(PR_UNPAID, dave_w.get_payment_status(lnaddr.paymenthash)) result, log = await alice_w.pay_invoice(pay_req, attempts=attempts) if not bob_forwarding: # reset to previous state, sleep 2s so that the second htlc can time out graph.workers['bob'].enable_htlc_forwarding = True await asyncio.sleep(2) if result: self.assertEqual(PR_PAID, dave_w.get_payment_status(lnaddr.paymenthash)) # check mpp is cleaned up async with OldTaskGroup() as g: for peer in peers: await g.spawn(peer.wait_one_htlc_switch_iteration()) for peer in peers: self.assertEqual(len(peer.lnworker.received_mpp_htlcs), 0) raise PaymentDone() elif len(log) == 1 and log[0].failure_msg.code == OnionFailureCode.MPP_TIMEOUT: raise PaymentTimeout() else: raise NoPathFound() async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized await group.spawn(pay(**kwargs)) async def test_payment_multipart(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) with self.assertRaises(PaymentDone): await self._run_mpp(graph, {}) async def test_payment_multipart_with_hold_invoice(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) with self.assertRaises(PaymentDone): await self._run_mpp(graph, {'test_hold_invoice': True}) async def test_payment_multipart_with_timeout(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) with self.assertRaises(PaymentTimeout): await self._run_mpp(graph, {'bob_forwarding': False}) async def test_payment_multipart_wrong_invoice(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) with self.assertRaises(NoPathFound): await self._run_mpp(graph, {'mpp_invoice': False}) async def test_payment_multipart_trampoline_e2e(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = { graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey), graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey), } # end-to-end trampoline: we attempt # * a payment with one trial: fails, because # we need at least one trial because the initial fees are too low # * a payment with several trials: should succeed with self.assertRaises(NoPathFound): await self._run_mpp(graph, {'alice_uses_trampoline': True, 'attempts': 1}) with self.assertRaises(PaymentDone): await self._run_mpp(graph,{'alice_uses_trampoline': True, 'attempts': 30}) async def test_payment_multipart_trampoline_legacy(self): graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = { graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey), graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey), } # trampoline-to-legacy: this is restricted, as there are no forwarders capable of doing this with self.assertRaises(NoPathFound): await self._run_mpp(graph, {'alice_uses_trampoline': True, 'attempts': 30, 'disable_trampoline_receiving': True}) async def test_fail_pending_htlcs_on_shutdown(self): """Alice tries to pay Dave via MPP. Dave receives some HTLCs but not all. Dave shuts down (stops wallet). We test if Dave fails the pending HTLCs during shutdown. """ graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph']) self.assertEqual(500_000_000_000, graph.channels[('alice', 'bob')].balance(LOCAL)) self.assertEqual(500_000_000_000, graph.channels[('alice', 'carol')].balance(LOCAL)) amount_to_pay = 600_000_000_000 peers = graph.peers.values() graph.workers['dave'].MPP_EXPIRY = 120 graph.workers['dave'].TIMEOUT_SHUTDOWN_FAIL_PENDING_HTLCS = 3 async def pay(): graph.workers['dave'].features |= LnFeatures.BASIC_MPP_OPT graph.workers['bob'].enable_htlc_forwarding = False # Bob will hold forwarded HTLCs assert graph.workers['alice'].network.channel_db is not None lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True, amount_msat=amount_to_pay) result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=1) async def stop(): hm = graph.channels[('dave', 'carol')].hm while len(hm.htlcs(LOCAL)) == 0 or len(hm.htlcs(REMOTE)) == 0: await asyncio.sleep(0.1) self.assertTrue(len(hm.htlcs(LOCAL)) > 0) self.assertTrue(len(hm.htlcs(REMOTE)) > 0) await graph.workers['dave'].stop() # Dave is supposed to have failed the pending incomplete MPP HTLCs self.assertEqual(0, len(hm.htlcs(LOCAL))) self.assertEqual(0, len(hm.htlcs(REMOTE))) raise SuccessfulTest() async def f(): async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized await group.spawn(pay()) await group.spawn(stop()) with self.assertRaises(SuccessfulTest): await f() async def _run_trampoline_payment( self, graph, *, include_routing_hints=True, test_hold_invoice=False, test_failure=False, attempts=2): alice_w = graph.workers['alice'] dave_w = graph.workers['dave'] async def pay(lnaddr, pay_req): self.assertEqual(PR_UNPAID, dave_w.get_payment_status(lnaddr.paymenthash)) result, log = await alice_w.pay_invoice(pay_req, attempts=attempts) async with OldTaskGroup() as g: for peer in peers: await g.spawn(peer.wait_one_htlc_switch_iteration()) for peer in peers: self.assertEqual(len(peer.lnworker.active_forwardings), 0) if result: self.assertEqual(PR_PAID, dave_w.get_payment_status(lnaddr.paymenthash)) raise PaymentDone() else: raise NoPathFound() async def f(): await self._activate_trampoline(alice_w) async with OldTaskGroup() as group: for peer in peers: await group.spawn(peer._message_loop()) await group.spawn(peer.htlc_switch()) for peer in peers: await peer.initialized lnaddr, pay_req = self.prepare_invoice(dave_w, include_routing_hints=include_routing_hints) self.prepare_recipient(dave_w, lnaddr.paymenthash, test_hold_invoice, test_failure) await group.spawn(pay(lnaddr, pay_req)) peers = graph.peers.values() # declare routing nodes as trampoline nodes electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = { graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey), graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey), } await f() def create_square_graph(self, *, direct=False, test_mpp_consolidation=False, is_legacy=False): graph_definition = self.GRAPH_DEFINITIONS['square_graph'] if not direct: # deplete channel from alice to carol and from bob to dave graph_definition['alice']['channels']['carol'] = depleted_channel graph_definition['bob']['channels']['dave'] = depleted_channel # insert a channel from bob to carol graph_definition['bob']['channels']['carol'] = low_fee_channel # now the only route possible is alice -> bob -> carol -> dave if test_mpp_consolidation: # deplete alice to carol so that all htlcs go through bob graph_definition['alice']['channels']['carol'] = depleted_channel graph = self.prepare_chans_and_peers_in_graph(graph_definition) if test_mpp_consolidation: graph.workers['dave'].features |= LnFeatures.BASIC_MPP_OPT graph.workers['alice'].network.config.TEST_FORCE_MPP = True if is_legacy: # turn off trampoline features in invoice graph.workers['dave'].features = graph.workers['dave'].features ^ LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM return graph async def test_trampoline_mpp_consolidation(self): with self.assertRaises(PaymentDone): graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True) await self._run_trampoline_payment(graph) async def test_trampoline_mpp_consolidation_with_hold_invoice(self): with self.assertRaises(PaymentDone): graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True) await self._run_trampoline_payment(graph, test_hold_invoice=True) async def test_trampoline_mpp_consolidation_with_hold_invoice_failure(self): with self.assertRaises(NoPathFound): graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True) await self._run_trampoline_payment(graph, test_hold_invoice=True, test_failure=True) async def test_payment_trampoline_legacy(self): with self.assertRaises(PaymentDone): graph = self.create_square_graph(direct=False, is_legacy=True) await self._run_trampoline_payment(graph, include_routing_hints=True) with self.assertRaises(NoPathFound): graph = self.create_square_graph(direct=False, is_legacy=True) await self._run_trampoline_payment(graph, include_routing_hints=False) async def test_payment_trampoline_e2e_direct(self): with self.assertRaises(PaymentDone): graph = self.create_square_graph(direct=True, is_legacy=False) await self._run_trampoline_payment(graph) async def test_payment_trampoline_e2e_indirect(self): # must use two trampolines with self.assertRaises(PaymentDone): graph = self.create_square_graph(direct=False, is_legacy=False) await self._run_trampoline_payment(graph)