Function test_funding_push

tests/test_connection.py:1200–1244

Try to push peer some sats

(node_factory, bitcoind, chainparams)

@pytest.mark.openchannel('v1')
def test_funding_push(node_factory, bitcoind, chainparams):
    """ Try to push peer some sats """
    # We track balances, to verify that accounting is ok.
    coin_mvt_plugin = os.path.join(os.getcwd(), 'tests/plugins/coin_movements.py')

    l1 = node_factory.get_node(options={'plugin': coin_mvt_plugin})
    l2 = node_factory.get_node(options={'plugin': coin_mvt_plugin})

    l1.rpc.connect(l2.info['id'], 'localhost', l2.port)

    # Send funds.
    amount = 2**24
    push_msat = 20000 * 1000
    bitcoind.rpc.sendtoaddress(l1.rpc.newaddr('bech32')['bech32'], amount / 10**8 + 0.01)
    bitcoind.generate_block(1)

    # Wait for it to arrive.
    wait_for(lambda: len(l1.rpc.listfunds()['outputs']) > 0)

    # Fail to open (try to push too much)
    with pytest.raises(RpcError, match=r'Requested to push_msat of 20000000msat is greater than available funding amount 10000sat'):
        l1.rpc.fundchannel(l2.info['id'], 10000, push_msat=push_msat)

    # This should work.
    amount = amount - 1
    l1.rpc.fundchannel(l2.info['id'], amount, push_msat=push_msat)

    bitcoind.generate_block(1)
    sync_blockheight(bitcoind, [l1])
    funds = only_one(l1.rpc.listfunds()['channels'])
    assert funds['our_amount_msat'] + push_msat == funds['amount_msat']

    chanid = first_channel_id(l2, l1)
    channel_mvts_1 = [
        {'type': 'chain_mvt', 'credit_msat': 16777215000, 'debit_msat': 0, 'tags': ['channel_open', 'opener']},
        {'type': 'channel_mvt', 'credit_msat': 0, 'debit_msat': 20000000, 'tags': ['pushed'], 'fees_msat': '0msat'},
    ]
    channel_mvts_2 = [
        {'type': 'chain_mvt', 'credit_msat': 0, 'debit_msat': 0, 'tags': ['channel_open']},
        {'type': 'channel_mvt', 'credit_msat': 20000000, 'debit_msat': 0, 'tags': ['pushed'], 'fees_msat': '0msat'},
    ]
    check_coin_moves(l1, chanid, channel_mvts_1, chainparams)
    check_coin_moves(l2, chanid, channel_mvts_2, chainparams)

    assert account_balance(l1, chanid) == amount * 1000 - push_msat


@pytest.mark.openchannel('v1')