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pytest: test askrene treats htlc_maximum_msat and htlc_minimum_msat restrictions properly.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell 2024-09-18 17:17:27 +09:30
parent db29a2d6b5
commit 3e96955c72
1 changed files with 49 additions and 0 deletions
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49
tests/test_askrene.py
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@ -607,3 +607,52 @@ def test_limits_fake_gossmap(node_factory, bitcoind):
# Must deliver exact amount.
assert sum(r['amount_msat'] for r in routes["routes"]) == 800_000_001
def test_max_htlc(node_factory, bitcoind):
"""A route which looks good isn't actually, because of max htlc limits"""
gsfile, nodemap = generate_gossip_store([GenChannel(0, 1, capacity_sats=500_000,
forward=GenChannel.Half(htlc_max=1_000_000)),
GenChannel(0, 1, capacity_sats=20_000)])
l1 = node_factory.get_node(gossip_store_file=gsfile.name)
routes = l1.rpc.getroutes(source=nodemap[0],
destination=nodemap[1],
amount_msat=20_000_000,
layers=[],
maxfee_msat=20_000_000,
final_cltv=10)
check_route_as_expected(routes['routes'],
[[{'short_channel_id': '0x1x0', 'amount_msat': 1_000_001, 'delay': 10 + 6}],
[{'short_channel_id': '0x1x1', 'amount_msat': 19_000_019, 'delay': 10 + 6}]])
# If we can't use channel 2, we fail.
l1.rpc.askrene_inform_channel(layer='removechan2',
short_channel_id='0x1x1', direction=1,
maximum_msat=0)
# FIXME: Better diag!
with pytest.raises(RpcError, match="Could not find route"):
l1.rpc.getroutes(source=nodemap[0],
destination=nodemap[1],
amount_msat=20_000_000,
layers=['removechan2'],
maxfee_msat=20_000_000,
final_cltv=10)
def test_min_htlc(node_factory, bitcoind):
"""A route which looks good isn't actually, because of min htlc limits"""
gsfile, nodemap = generate_gossip_store([GenChannel(0, 1, capacity_sats=500_000,
forward=GenChannel.Half(htlc_min=2_000)),
GenChannel(0, 1, capacity_sats=20_000)])
l1 = node_factory.get_node(gossip_store_file=gsfile.name)
with pytest.raises(RpcError, match="Amount 1000msat below minimum across 0x1x0/1"):
l1.rpc.getroutes(source=nodemap[0],
destination=nodemap[1],
amount_msat=1000,
layers=[],
maxfee_msat=20_000_000,
final_cltv=10)