Function test_getroutes_single_path

tests/test_askrene.py:852–934

Test getroutes generating single path payments

(node_factory)

def test_getroutes_single_path(node_factory):
    """Test getroutes generating single path payments"""
    gsfile, nodemap = generate_gossip_store(
        [
            GenChannel(0, 1),
            GenChannel(1, 2, capacity_sats=9000),
            GenChannel(1, 2, capacity_sats=10000),
        ]
    )
    # Set up l1 with this as the gossip_store
    l1 = node_factory.get_node(gossip_store_file=gsfile.name)

    # To be able to route this amount two parts are needed, therefore a single
    # pay search will fail.
    # FIXME: the explanation for the failure is wrong
    with pytest.raises(RpcError):
        l1.rpc.getroutes(
            source=nodemap[1],
            destination=nodemap[2],
            amount_msat=10000001,
            layers=[],
            maxparts=1,
            maxfee_msat=1000,
            final_cltv=99,
        )

    # For this amount, only one solution is possible
    check_getroute_paths(
        l1,
        nodemap[1],
        nodemap[2],
        10000000,
        [
            [
                {
                    "short_channel_id_dir": "3x2x2/1",
                    "node_id_out": nodemap[2],
                    "amount_in_msat": 10000010,
                    "cltv_in": 99 + 6,
                }
            ]
        ],
        maxparts=1,
    )

    # To be able to route this amount two parts are needed, therefore a single
    # pay search will fail.
    # FIXME: the explanation for the failure is wrong
    with pytest.raises(RpcError):
        l1.rpc.getroutes(
            source=nodemap[0],
            destination=nodemap[2],
            amount_msat=10000001,
            layers=[],
            maxparts=1,
            maxfee_msat=1000,
            final_cltv=99,
        )