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We might only have seen one side of the channel, as shown below. Wait
for both:
```
_____________________________ test_wumbo_channels ______________________________
[gw2] linux -- Python 3.7.13 /opt/hostedtoolcache/Python/3.7.13/x64/bin/python3
node_factory = <pyln.testing.utils.NodeFactory object at 0x7f5d51743b10>
bitcoind = <pyln.testing.utils.BitcoinD object at 0x7f5d51699d10>
@pytest.mark.openchannel('v1')
@pytest.mark.openchannel('v2')
def test_wumbo_channels(node_factory, bitcoind):
l1, l2, l3 = node_factory.get_nodes(3,
opts=[{'large-channels': None},
{'large-channels': None},
{}])
conn = l1.rpc.connect(l2.info['id'], 'localhost', port=l2.port)
expected_features = expected_peer_features(wumbo_channels=True)
if l1.config('experimental-dual-fund'):
expected_features = expected_peer_features(wumbo_channels=True,
extra=[21, 29])
assert conn['features'] == expected_features
assert only_one(l1.rpc.listpeers(l2.info['id'])['peers'])['features'] == expected_features
# Now, can we open a giant channel?
l1.fundwallet(1 << 26)
l1.rpc.fundchannel(l2.info['id'], 1 << 24)
# Get that mined, and announced.
bitcoind.generate_block(6, wait_for_mempool=1)
# Connect l3, get gossip.
l3.rpc.connect(l1.info['id'], 'localhost', port=l1.port)
wait_for(lambda: len(l3.rpc.listnodes(l1.info['id'])['nodes']) == 1)
wait_for(lambda: 'features' in only_one(l3.rpc.listnodes(l1.info['id'])['nodes']))
# Make sure channel capacity is what we expected.
> assert ([c['amount_msat'] for c in l3.rpc.listchannels()['channels']]
== [Millisatoshi(str(1 << 24) + "sat")] * 2)
E assert [16777216000msat] == [16777216000m...777216000msat]
E Right contains one more item: 16777216000msat
E Full diff:
E - [16777216000msat, 16777216000msat]
E + [16777216000msat]
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>