splice: Agressive restart testing during splices

Test node restarts in lots of phases of splice.

Changelog-None

Author: ddustin

lightningd/channel.c

@@ -137,7 +137,6 @@ new_inflight(struct channel *channel,
 	     s64 splice_amnt,
 	     bool i_am_initiator)
 {
-	struct wally_psbt *last_tx_psbt_clone;
 	struct channel_inflight *inflight
 		= tal(channel, struct channel_inflight);
 	struct funding_info *funding
@@ -156,10 +155,8 @@ new_inflight(struct channel *channel,
 
 	/* Make a 'clone' of this tx */
 	inflight->last_tx = NULL;
-	if (last_tx) {
-		last_tx_psbt_clone = clone_psbt(inflight, last_tx->psbt);
-		inflight->last_tx = bitcoin_tx_with_psbt(inflight, last_tx_psbt_clone);
-	}
+	if (last_tx)
+		inflight->last_tx = clone_bitcoin_tx(inflight, last_tx);
 	inflight->last_sig = last_sig;
 	inflight->tx_broadcast = false;
 

tests/test_splicing.py

@@ -39,3 +39,149 @@ def test_splice(node_factory, bitcoind):
     # Check that the splice doesn't generate a unilateral close transaction
     time.sleep(5)
     assert l1.db_query("SELECT count(*) as c FROM channeltxs;")[0]['c'] == 0
+
+
+def make_pending_splice(node_factory):
+    l1, l2 = node_factory.line_graph(2, fundamount=1000000, wait_for_announce=True, opts={'experimental-splicing': None, 'may_reconnect': True})
+
+    chan_id = l1.get_channel_id(l2)
+
+    funds_result = l1.rpc.fundpsbt("109000sat", "slow", 166, excess_as_change=True)
+
+    result = l1.rpc.splice_init(chan_id, 100000, funds_result['psbt'])
+    result = l1.rpc.splice_update(chan_id, result['psbt'])
+    result = l1.rpc.signpsbt(result['psbt'])
+    result = l1.rpc.splice_signed(chan_id, result['signed_psbt'])
+
+    return [l1, l2]
+
+
+def wait_for_await(l1, l2):
+    l2.daemon.wait_for_log(r'CHANNELD_NORMAL to CHANNELD_AWAITING_SPLICE')
+    l1.daemon.wait_for_log(r'CHANNELD_NORMAL to CHANNELD_AWAITING_SPLICE')
+
+
+def wait_for_confirm(l1, l2):
+    l2.daemon.wait_for_log(r'CHANNELD_AWAITING_SPLICE to CHANNELD_NORMAL')
+    l1.daemon.wait_for_log(r'CHANNELD_AWAITING_SPLICE to CHANNELD_NORMAL')
+
+
+def confirm(bitcoind):
+    bitcoind.generate_block(6, wait_for_mempool=1)
+
+
+def confirm_and_wait(l1, l2, bitcoind):
+    confirm(bitcoind)
+    wait_for_confirm(l1, l2)
+
+
+def wait_for_await_and_finish(l1, l2, bitcoind):
+    wait_for_await(l1, l2)
+    confirm_and_wait(l1, l2, bitcoind)
+
+
+def confirm_funding_not_spent(nodes):
+    for node in nodes:
+        assert not node.daemon.is_in_log("Funding transaction spent")
+        assert node.db_query("SELECT count(*) as c FROM channeltxs;")[0]['c'] == 0
+
+
+@pytest.mark.openchannel('v1')
+@pytest.mark.openchannel('v2')
+@unittest.skipIf(TEST_NETWORK != 'regtest', 'elementsd doesnt yet support PSBT features we need')
+def test_splice_restart(node_factory, bitcoind):
+    nodes = []
+
+    l1, l2 = make_pending_splice(node_factory)
+    l2.restart()
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    l1.restart()
+    # failing here "bad commit sig"
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    l1.restart()
+    l2.restart()
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    l1.restart()
+    confirm_and_wait(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    l2.restart()
+    confirm_and_wait(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    l1.restart()
+    l2.restart()
+    confirm_and_wait(l1, l2, bitcoind)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    l1.restart()
+    wait_for_confirm(l1, l2)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    l2.restart()
+    wait_for_confirm(l1, l2)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    l1.restart()
+    l2.restart()
+    wait_for_confirm(l1, l2)
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    l1.restart()
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    l2.restart()
+    nodes.append(l1)
+    nodes.append(l2)
+
+    l1, l2 = make_pending_splice(node_factory)
+    wait_for_await(l1, l2)
+    confirm(bitcoind)
+    wait_for_await_and_finish(l1, l2, bitcoind)
+    l1.restart()
+    l2.restart()
+    nodes.append(l1)
+    nodes.append(l2)
+
+    confirm_funding_not_spent(nodes)