mirrors/core-lightning
1
0
Fork 0
mirror of https://github.com/ElementsProject/lightning.git synced 2024-11-19 09:54:16 +01:00
Code Issues Projects Releases Wiki Activity

pytest: test for commitment feerate.

Browse Source 
Interesting we didn't actually test that the feerate we use is
actually delivered.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2023-06-26 08:33:21 +09:30
parent e47e51edf2
commit d895ef4fee
1 changed files with 42 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
tests/test_opening.py
View File

@ -2176,3 +2176,45 @@ def test_no_anchor_liquidity_ads(node_factory, bitcoind):
assert chan['state'] == 'DUALOPEND_AWAITING_LOCKIN'
assert chan['funding']['local_funds_msat'] == chan['funding']['remote_funds_msat']
assert 'option_anchor_outputs' not in chan['features']
@unittest.skipIf(TEST_NETWORK != 'regtest', 'elementsd has different feerates')
def test_commitment_feerate(bitcoind, node_factory):
l1, l2 = node_factory.get_nodes(2)
opening_feerate = commitment_feerate = 2000
l1.fundwallet(10**8)
l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
l1.rpc.fundchannel(l2.info['id'], 10**6,
feerate=f'{opening_feerate}perkw')
wait_for(lambda: bitcoind.rpc.getrawmempool() != [])
tx = only_one([t for t in bitcoind.rpc.getrawmempool(True).values()])
feerate_perkw = int(tx['fees']['base'] * 100_000_000) / (tx['weight'] / 1000)
assert opening_feerate - 10 < feerate_perkw < opening_feerate + 10
bitcoind.generate_block(1)
l2.stop()
l1.rpc.close(l2.info['id'], unilateraltimeout=1)
# feerate for this will be the same
wait_for(lambda: bitcoind.rpc.getrawmempool() != [])
tx = only_one([t for t in bitcoind.rpc.getrawmempool(True).values()])
fee = int(tx['fees']['base'] * 100_000_000)
# Weight is idealized worst case, and we don't meet it!
if anchor_expected():
# 200 is the approximate cost estimate used for anchor outputs.
assert tx['weight'] < 1124 - 200
else:
assert tx['weight'] < 724
if anchor_expected():
# We pay for two anchors, but only produce one.
fee -= 330
weight = 1124
else:
weight = 724
feerate_perkw = fee / (weight / 1000)
assert commitment_feerate - 10 < feerate_perkw < commitment_feerate + 10