Function test_channel_abandon

tests/test_connection.py:380–411

Our open tx isn't mined, we doublespend it away

(node_factory, bitcoind)

def test_channel_abandon(node_factory, bitcoind):
    """Our open tx isn't mined, we doublespend it away"""
    l1, l2 = node_factory.get_nodes(2)

    SATS = 10**6

    # Add some for fees
    l1.fundwallet(SATS + 10000)
    l1.rpc.connect(l2.info['id'], 'localhost', l2.port)
    l1.rpc.fundchannel(l2.info['id'], SATS, feerate='1875perkw')

    opening_utxo = only_one([o for o in l1.rpc.listfunds()['outputs'] if o['reserved']])
    psbt = l1.rpc.utxopsbt(0, "253perkw", 0, [opening_utxo['txid'] + ':' + str(opening_utxo['output'])], reserve=0, reservedok=True)['psbt']

    # We expect a reservation for 2016 blocks; unreserve it.
    reservations = only_one(l1.rpc.unreserveinputs(psbt, reserve=2015)['reservations'])
    assert reservations['reserved']
    assert reservations['reserved_to_block'] == bitcoind.rpc.getblockchaininfo()['blocks'] + 1

    assert only_one(l1.rpc.unreserveinputs(psbt, reserve=1)['reservations'])['reserved'] is False

    # Now it's unreserved, we can doublespend it (as long as we exceed
    # previous fee to RBF!).
    withdraw = l1.rpc.withdraw(l1.rpc.newaddr()['bech32'], "all")

    assert bitcoind.rpc.decoderawtransaction(withdraw['tx'])['vout'][0]['value'] > SATS / 10**8
    bitcoind.generate_block(1, wait_for_mempool=withdraw['txid'])

    # FIXME: lightningd should notice channel will never now open!
    print(l1.rpc.listpeers())
    assert (only_one(only_one(l1.rpc.listpeers()['peers'])['channels'])['state']
            == 'CHANNELD_AWAITING_LOCKIN')


@pytest.mark.developer