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channeld: send error, not warning, if peer has old commitment number.
This is the minimal change to meet the desired outcome of https://github.com/lightning/bolts/issues/934 which wants to give obsolete-db nodes a chance to fix things up, before we close the channel. We need to dance around a bit here, since we *will* close the channel if we receive an ERROR, so we suppress that. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
Christian Decker
parent
437ae11610
commit
b698a5a5ef
2 changed files with 74 additions and 10 deletions
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@ -3002,12 +3002,14 @@ skip_tlvs:
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}
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retransmit_revoke_and_ack = true;
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} else if (next_revocation_number < peer->next_index[LOCAL] - 1) {
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peer_failed_err(peer->pps,
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&peer->channel_id,
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"bad reestablish revocation_number: %"PRIu64
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" vs %"PRIu64,
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next_revocation_number,
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peer->next_index[LOCAL]);
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/* Send a warning here! Because this is what it looks like if peer is
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* in the past, and they might still recover. */
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peer_failed_warn(peer->pps,
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&peer->channel_id,
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"bad reestablish revocation_number: %"PRIu64
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" vs %"PRIu64,
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next_revocation_number,
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peer->next_index[LOCAL]);
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} else if (next_revocation_number > peer->next_index[LOCAL] - 1) {
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if (!check_extra_fields)
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/* They don't support option_data_loss_protect or
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@ -2926,11 +2926,11 @@ def test_opener_simple_reconnect(node_factory, bitcoind):
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@unittest.skipIf(os.getenv('TEST_DB_PROVIDER', 'sqlite3') != 'sqlite3', "sqlite3-specific DB rollback")
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@pytest.mark.developer("needs LIGHTNINGD_DEV_LOG_IO")
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@pytest.mark.openchannel('v1')
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@pytest.mark.openchannel('v2')
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def test_dataloss_protection(node_factory, bitcoind):
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l1 = node_factory.get_node(may_reconnect=True, options={'log-level': 'io'},
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allow_warning=True,
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feerates=(7500, 7500, 7500, 7500))
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l2 = node_factory.get_node(may_reconnect=True, options={'log-level': 'io'},
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feerates=(7500, 7500, 7500, 7500), allow_broken_log=True)
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@ -2998,14 +2998,16 @@ def test_dataloss_protection(node_factory, bitcoind):
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# l2 should freak out!
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l2.daemon.wait_for_log("Peer permanent failure in CHANNELD_NORMAL: Awaiting unilateral close")
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# l1 should drop to chain.
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l1.wait_for_channel_onchain(l2.info['id'])
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# l2 must NOT drop to chain.
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l2.daemon.wait_for_log("Cannot broadcast our commitment tx: they have a future one")
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assert not l2.daemon.is_in_log('sendrawtx exit 0',
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start=l2.daemon.logsearch_start)
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# l1 should drop to chain, but doesn't always receive ERROR before it sends warning.
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# We have to reconnect once
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l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
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l1.wait_for_channel_onchain(l2.info['id'])
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closetxid = only_one(bitcoind.rpc.getrawmempool(False))
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# l2 should still recover something!
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@ -3024,6 +3026,66 @@ def test_dataloss_protection(node_factory, bitcoind):
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assert (closetxid, "confirmed") in set([(o['txid'], o['status']) for o in l2.rpc.listfunds()['outputs']])
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@unittest.skipIf(os.getenv('TEST_DB_PROVIDER', 'sqlite3') != 'sqlite3', "sqlite3-specific DB rollback")
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@pytest.mark.openchannel('v1')
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@pytest.mark.openchannel('v2')
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@pytest.mark.developer("needs dev-disconnect, dev-no-reconnect")
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def test_dataloss_protection_no_broadcast(node_factory, bitcoind):
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# If l2 sends an old version, but *doesn't* send an error, l1 should not broadcast tx.
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# (https://github.com/lightning/bolts/issues/934)
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l1 = node_factory.get_node(may_reconnect=True,
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feerates=(7500, 7500, 7500, 7500),
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allow_warning=True,
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options={'dev-no-reconnect': None})
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l2 = node_factory.get_node(may_reconnect=True,
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feerates=(7500, 7500, 7500, 7500), allow_broken_log=True,
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disconnect=['-WIRE_ERROR'],
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options={'dev-no-reconnect': None})
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l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
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l1.fundchannel(l2, 10**6)
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l2.stop()
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# Save copy of the db.
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dbpath = os.path.join(l2.daemon.lightning_dir, TEST_NETWORK, "lightningd.sqlite3")
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orig_db = open(dbpath, "rb").read()
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l2.start()
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l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
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# After an htlc, we should get different results (two more commits)
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l1.pay(l2, 200000000)
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# Make sure both sides consider it completely settled (has received both
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# REVOKE_AND_ACK)
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l1.daemon.wait_for_logs(["peer_in WIRE_REVOKE_AND_ACK"] * 2)
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l2.daemon.wait_for_logs(["peer_in WIRE_REVOKE_AND_ACK"] * 2)
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# Now, move l2 back in time.
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l2.stop()
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# Save new db
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new_db = open(dbpath, "rb").read()
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# Overwrite with OLD db.
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open(dbpath, "wb").write(orig_db)
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l2.start()
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l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
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# l2 should freak out!
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l2.daemon.wait_for_logs(["Peer permanent failure in CHANNELD_NORMAL: Awaiting unilateral close"])
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# l1 should NOT drop to chain, since it didn't receive an error.
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time.sleep(5)
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assert bitcoind.rpc.getrawmempool(False) == []
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# fix up l2.
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l2.stop()
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open(dbpath, "wb").write(new_db)
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l2.start()
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# All is forgiven
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l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
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l1.pay(l2, 200000000)
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@pytest.mark.developer("needs dev_disconnect")
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def test_restart_multi_htlc_rexmit(node_factory, bitcoind, executor):
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# l1 disables commit timer once we send first htlc, dies on commit
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