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pytest: test fee estimates which start working after channel establishment.

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They need to specify fees to get a channel before this, but it's possible.
The test revealed no surprises (other than the last change).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2021-03-01 14:31:56 +10:30
parent 959d1c9983
commit 804c2c2c20
1 changed files with 51 additions and 0 deletions
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51
tests/test_connection.py
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@ -2039,6 +2039,57 @@ def test_fee_limits(node_factory, bitcoind):
l1.rpc.close(chan)
@unittest.skipIf(not DEVELOPER, "needs dev-no-fake-fees")
def test_update_fee_dynamic(node_factory, bitcoind):
# l1 has no fee estimates to start.
l1 = node_factory.get_node(options={'log-level': 'io',
'dev-no-fake-fees': True}, start=False)
l1.daemon.rpcproxy.mock_rpc('estimatesmartfee', {
'error': {"errors": ["Insufficient data or no feerate found"], "blocks": 0}
})
l1.start()
l2 = node_factory.get_node()
l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
# Fails due to lack of fee estimate.
with pytest.raises(RpcError, match='Cannot estimate fees'):
l1.fundchannel(l2, 10**6)
# Explicit feerate works.
l1.fundchannel(l2, 10**6, feerate='10000perkw')
l1.set_feerates((15000, 11000, 7500, 3750))
# It will send UPDATE_FEE when it tries to send HTLC.
inv = l2.rpc.invoice(5000, 'test_update_fee_dynamic', 'test_update_fee_dynamic')['bolt11']
l1.rpc.pay(inv)
l2.daemon.wait_for_log('peer_in.*UPDATE_FEE')
# Now we take it away again!
l1.daemon.rpcproxy.mock_rpc('estimatesmartfee', {
'error': {"errors": ["Insufficient data or no feerate found"], "blocks": 0}
})
# Make sure that registers! (DEVELOPER means polling every second)
time.sleep(2)
inv = l2.rpc.invoice(5000, 'test_update_fee_dynamic2', 'test_update_fee_dynamic2')['bolt11']
l1.rpc.pay(inv)
# Won't update fee.
assert not l2.daemon.is_in_log('peer_in.*UPDATE_FEE',
start=l2.daemon.logsearch_start)
# Bring it back.
l1.set_feerates((14000, 10000, 7000, 3000))
# It will send UPDATE_FEE when it tries to send HTLC.
inv = l2.rpc.invoice(5000, 'test_update_fee_dynamic3', 'test_update_fee_dynamic')['bolt11']
l1.rpc.pay(inv)
l2.daemon.wait_for_log('peer_in.*UPDATE_FEE')
@unittest.skipIf(not DEVELOPER, "needs DEVELOPER=1")
def test_update_fee_reconnect(node_factory, bitcoind):
# Disconnect after commitsig for fee update.