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pytest: test for emergency minimum fund violations.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell
2023-06-29 09:44:10 +09:30
parent 3e57496af9
commit e6d23b5677
1 changed files with 56 additions and 0 deletions
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56
tests/test_opening.py
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@@ -2216,3 +2216,59 @@ def test_commitment_feerate(bitcoind, node_factory, anchors):
weight = 724
feerate_perkw = fee / (weight / 1000)
assert commitment_feerate - 10 < feerate_perkw < commitment_feerate + 10
@unittest.skipIf(TEST_NETWORK != 'regtest', 'elementsd has different tx costs')
def test_anchor_min_emergency(bitcoind, node_factory):
l1, l2 = node_factory.line_graph(2, opts={'experimental-anchors': None},
fundchannel=False)
addr = l1.rpc.newaddr()['bech32']
bitcoind.rpc.sendtoaddress(addr, 5000000 / 10**8)
bitcoind.generate_block(1, wait_for_mempool=1)
wait_for(lambda: l1.rpc.listfunds()['outputs'] != [])
# Cost of tx itself is 3637.
with pytest.raises(RpcError, match=r'We would not have enough left for min-emergency-msat 25000sat'):
l1.rpc.fundchannel(l2.info['id'], f'{5000000 - 3637}sat')
l1.rpc.fundchannel(l2.info['id'], 'all')
bitcoind.generate_block(1, wait_for_mempool=1)
# Wait for l1 to see that spend.
wait_for(lambda: len(l1.rpc.listfunds()['outputs']) == 1)
# Default is 25000 sats.
assert only_one(l1.rpc.listfunds()['outputs'])['amount_msat'] == Millisatoshi('25000sat')
# And we can't spend it, either!
addr2 = l2.rpc.newaddr()['bech32']
with pytest.raises(RpcError, match=r'We would not have enough left for min-emergency-msat 25000sat'):
l1.rpc.withdraw(addr2, '500sat')
with pytest.raises(RpcError, match=r'We would not have enough left for min-emergency-msat 25000sat'):
l1.rpc.withdraw(addr2, 'all')
# Even with onchain anchor channel, it still keeps reserve (just in case!).
l1.rpc.close(l2.info['id'])
bitcoind.generate_block(1, wait_for_mempool=1)
sync_blockheight(bitcoind, [l1])
# This workse, but will leave the emergency funds as change.
l1.rpc.withdraw(addr2, 'all')
bitcoind.generate_block(1, wait_for_mempool=1)
sync_blockheight(bitcoind, [l1])
wait_for(lambda: [(o['amount_msat'], o['status']) for o in l1.rpc.listfunds()['outputs']] == [(Millisatoshi('25000sat'), 'confirmed')])
# Can't spend it!
with pytest.raises(RpcError, match=r'We would not have enough left for min-emergency-msat 25000sat'):
l1.rpc.withdraw(addr2, 'all')
# Once it's totally forgotten, we can spend that!
bitcoind.generate_block(99)
wait_for(lambda: l1.rpc.listpeerchannels()['channels'] == [])
# And it's *all* gone!
l1.rpc.withdraw(addr2, 'all')
bitcoind.generate_block(1, wait_for_mempool=1)
wait_for(lambda: l1.rpc.listfunds()['outputs'] == [])