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lnchannel: apply stricter max_htlc_value_in_flight rules for receiving

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Otherwise we create invoices that eclair cannot route to us
This commit is contained in:
ThomasV
2025-05-20 12:11:20 +02:00
parent 713a20e309
commit b432a1406a
2 changed files with 23 additions and 6 deletions
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19
tests/test_lnchannel.py
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@@ -738,24 +738,31 @@ class TestAvailableToSpend(ElectrumTestCase):
local_max_inflight=1000000000,
remote_max_inflight=2000000000)
# alice can send 20 but bob can only receive 10, because of stricter receiving rules
self.assertEqual(2000000000, alice_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, bob_channel.available_to_spend(REMOTE))
# bob can send 10, alice can receive 10
self.assertEqual(1000000000, bob_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, alice_channel.available_to_spend(REMOTE))
paymentPreimage1 = b"\x01" * 32
htlc = UpdateAddHtlc(
payment_hash=bitcoin.sha256(paymentPreimage1),
amount_msat=1500000000,
amount_msat=1000000000,
cltv_abs=5,
timestamp=0,
)
# put 15mBTC inflight a->b
# put 10mBTC inflight a->b
alice_idx1 = alice_channel.add_htlc(htlc).htlc_id
bob_idx1 = bob_channel.receive_htlc(htlc).htlc_id
force_state_transition(alice_channel, bob_channel)
self.assertEqual(500000000, alice_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, alice_channel.available_to_spend(LOCAL))
self.assertEqual(0, bob_channel.available_to_spend(REMOTE))
self.assertEqual(1000000000, bob_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, alice_channel.available_to_spend(REMOTE))
paymentPreimage2 = b"\x02" * 32
htlc2 = UpdateAddHtlc(
@@ -764,7 +771,6 @@ class TestAvailableToSpend(ElectrumTestCase):
cltv_abs=5,
timestamp=0,
)
# try to add another 15mBTC HTLC while 15mBTC already inflight
with self.assertRaises(lnutil.PaymentFailure):
alice_idx2 = alice_channel.add_htlc(htlc2).htlc_id
@@ -775,7 +781,10 @@ class TestAvailableToSpend(ElectrumTestCase):
force_state_transition(alice_channel, bob_channel)
self.assertEqual(2000000000, alice_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, alice_channel.available_to_spend(REMOTE))
self.assertEqual(1000000000, bob_channel.available_to_spend(LOCAL))
self.assertEqual(1000000000, alice_channel.available_to_spend(REMOTE))
class TestAvailableToSpendAnchors(TestAvailableToSpend):