Prefer non-onion nodes in blinded paths

[TheBlueMatt]

If, when building a blinded path, we pick a peer as an intro node, but that peer only supports onions, we may end up making responses difficult - (a) not all peers have a local tor daemon and can connect to onions to DC to respond, (b) connecting to an onion has substantial additional latency. IMO we should filter out onion nodes when building an onion message reply path until onion message routing is more common.

[Harshil-Jani]

Hey @TheBlueMatt I was looking at the unit test reply_path and was curious about the following

• How do we get to know if a node is onion node or not ? I have tried looking at the nodes by debugging it (attaching o/p below) but it got overwhelming at first sight to figure out the field which can help out.
• Where do we filter them out ? I guess in new_for_message ?

Completely new to lightening protocol technically.

#[test]
fn reply_path() {
	let mut nodes = create_nodes(4);
	let test_msg = TestCustomMessage::Request;
	let secp_ctx = Secp256k1::new();

	// Destination::Node
	let path = OnionMessagePath {
		intermediate_nodes: vec![nodes[1].node_id, nodes[2].node_id],
		destination: Destination::Node(nodes[3].node_id),
		first_node_addresses: None,
	};
	let reply_path = BlindedPath::new_for_message(&[nodes[2].node_id, nodes[1].node_id, nodes[0].node_id], &*nodes[0].entropy_source, &secp_ctx).unwrap();
	nodes[0].messenger.send_onion_message_using_path(path, test_msg.clone(), Some(reply_path)).unwrap();
	nodes[3].custom_message_handler.expect_message(TestCustomMessage::Request);
	pass_along_path(&nodes);
	// Make sure the last node successfully decoded the reply path.
	nodes[0].custom_message_handler.expect_message(TestCustomMessage::Response);
	nodes.reverse();
	pass_along_path(&nodes);

	// Destination::BlindedPath
	let blinded_path = BlindedPath::new_for_message(&[nodes[1].node_id, nodes[2].node_id, nodes[3].node_id], &*nodes[3].entropy_source, &secp_ctx).unwrap();
	let path = OnionMessagePath {
		intermediate_nodes: vec![],
		destination: Destination::BlindedPath(blinded_path),
		first_node_addresses: None,
	};
	let reply_path = BlindedPath::new_for_message(&[nodes[2].node_id, nodes[1].node_id, nodes[0].node_id], &*nodes[0].entropy_source, &secp_ctx).unwrap();

	nodes[0].messenger.send_onion_message_using_path(path, test_msg, Some(reply_path)).unwrap();
	nodes[3].custom_message_handler.expect_message(TestCustomMessage::Request);
	pass_along_path(&nodes);

	// Make sure the last node successfully decoded the reply path.
	nodes[0].custom_message_handler.expect_message(TestCustomMessage::Response);
	nodes.reverse();
	pass_along_path(&nodes);
}

Output of nodes being created

[
    MessengerNode {
        node_id: PublicKey(
            8f07ddd5e9f5179cff19486034181ed76505baaad53e5d994064127b56c5841bd1e8a8697ad42251de39f6a72081dfdf42abc542a6d6fe0715548b588fafbe70,
        ),
        entropy_source: TestKeysInterface {
            backing: PhantomKeysManager {
                inner: KeysManager {
                    secp_ctx: <secp256k1 context 0x7f5e640027f0, all capabilities>,
                    node_secret: SecretKey(
                        #50b52cf79f2cc4e4,
                    ),
                    node_id: PublicKey(
                        88ce8f35acfc83a200d0b3bf998a4bd18ffdecad1061e3707c0cacf28515927f4e1b189ad34db624e1e906128da9b9428d73532b728d4d44dfd97ab21ac33459,
                    ),
                    inbound_payment_key: KeyMaterial(
                        [
                            42,
                            90,
                            154,
                            123,
                            239,
                            238,
                            192,
                            97,
                            51,
                            63,
                            55,
                            130,
                            194,
                            193,
                            107,
                            129,
                            71,
                            4,
                            143,
                            131,
                            4,
                            176,
                            187,
                            222,
                            174,
                            101,
                            172,
                            77,
                            4,
                            221,
                            230,
                            168,
                        ],
                    ),
                    destination_script: Script(OP_0 OP_PUSHBYTES_20 d5a9aa98b89acc215fc3d23d6fec0ad59ca3665f),
                    shutdown_pubkey: PublicKey(
                        ea575385e673323088405b596c69ec54f2726dc958e5a0c146aa3e070e76b665ed28c1ec994d22f2d8204420df70fb43259fc198fe83d7c25b72038ae0e12aaf,
                    ),
                    channel_master_key: ExtendedPrivKey {
                        network: Testnet,
                        depth: 1,
                        parent_fingerprint: 0x729c0d85,
                        child_number: Hardened {
                            index: 3,
                        },
                        private_key: SecretKey(
                            #ae13f0902beb3dbe,
                        ),
                        chain_code: 0xbc7f5327a8cb1cd2cd6d46527fec11fb5c3dc8af359add792e2d02b2f5893a66,
                    },
                    channel_child_index: 0,
                    entropy_source: RandomBytes {
                        seed: [
                            15,
                            154,
                            183,
                            3,
                            49,
                            171,
                            42,
                            47,
                            153,
                            213,
                            11,
                            238,
                            54,
                            18,
                            22,
                            51,
                            108,
                            224,
                            96,
                            136,
                            252,
                            46,
                            167,
                            28,
                            196,
                            241,
                            67,
                            202,
                            176,
                            74,
                            13,
                            116,
                        ],
                        index: AtomicCounter {
                            counter_low: 2,
                            counter_high: 1,
                        },
                    },
                    seed: [
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                    ],
                    starting_time_secs: 1296688602,
                    starting_time_nanos: 0,
                },
                inbound_payment_key: KeyMaterial(
                    [
                        127,
                        78,
                        106,
                        114,
                        154,
                        160,
                        10,
                        226,
                        11,
                        80,
                        228,
                        106,
                        117,
                        176,
                        213,
                        250,
                        62,
                        50,
                        224,
                        51,
                        86,
                        108,
                        170,
                        69,
                        175,
                        159,
                        207,
                        93,
                        58,
                        49,
                        30,
                        204,
                    ],
                ),
                phantom_secret: SecretKey(
                    #4c37b22d677ad8d8,
                ),
                phantom_node_id: PublicKey(
                    62fe0a59825cb4cf520904d0710dac6cc3a1164de248b8fe36f4a35966d6c55685675e056757b5d49c3ee0712783ca997ba2585b1b066c9d5f11bcf0d6fbbbf8,
                ),
            },
            override_random_bytes: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218013,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            disable_revocation_policy_check: false,
            enforcement_states: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218014,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            expectations: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218015,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            unavailable_signers: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218016,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
        messenger: OnionMessenger {
            entropy_source: TestKeysInterface {
                backing: PhantomKeysManager {
                    inner: KeysManager {
                        secp_ctx: <secp256k1 context 0x7f5e640027f0, all capabilities>,
                        node_secret: SecretKey(
                            #50b52cf79f2cc4e4,
                        ),
                        node_id: PublicKey(
                            88ce8f35acfc83a200d0b3bf998a4bd18ffdecad1061e3707c0cacf28515927f4e1b189ad34db624e1e906128da9b9428d73532b728d4d44dfd97ab21ac33459,
                        ),
                        inbound_payment_key: KeyMaterial(
                            [
                                42,
                                90,
                                154,
                                123,
                                239,
                                238,
                                192,
                                97,
                                51,
                                63,
                                55,
                                130,
                                194,
                                193,
                                107,
                                129,
                                71,
                                4,
                                143,
                                131,
                                4,
                                176,
                                187,
                                222,
                                174,
                                101,
                                172,
                                77,
                                4,
                                221,
                                230,
                                168,
                            ],
                        ),
                        destination_script: Script(OP_0 OP_PUSHBYTES_20 d5a9aa98b89acc215fc3d23d6fec0ad59ca3665f),
                        shutdown_pubkey: PublicKey(
                            ea575385e673323088405b596c69ec54f2726dc958e5a0c146aa3e070e76b665ed28c1ec994d22f2d8204420df70fb43259fc198fe83d7c25b72038ae0e12aaf,
                        ),
                        channel_master_key: ExtendedPrivKey {
                            network: Testnet,
                            depth: 1,
                            parent_fingerprint: 0x729c0d85,
                            child_number: Hardened {
                                index: 3,
                            },
                            private_key: SecretKey(
                                #ae13f0902beb3dbe,
                            ),
                            chain_code: 0xbc7f5327a8cb1cd2cd6d46527fec11fb5c3dc8af359add792e2d02b2f5893a66,
                        },
                        channel_child_index: 0,
                        entropy_source: RandomBytes {
                            seed: [
                                15,
                                154,
                                183,
                                3,
                                49,
                                171,
                                42,
                                47,
                                153,
                                213,
                                11,
                                238,
                                54,
                                18,
                                22,
                                51,
                                108,
                                224,
                                96,
                                136,
                                252,
                                46,
                                167,
                                28,
                                196,
                                241,
                                67,
                                202,
                                176,
                                74,
                                13,
                                116,
                            ],
                            index: AtomicCounter {
                                counter_low: 2,
                                counter_high: 1,
                            },
                        },
                        seed: [
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                            0,
                        ],
                        starting_time_secs: 1296688602,
                        starting_time_nanos: 0,
                    },
                    inbound_payment_key: KeyMaterial(
                        [
                            127,
                            78,
                            106,
                            114,
                            154,
                            160,
                            10,
                            226,
                            11,
                            80,
                            228,
                            106,
                            117,
                            176,
                            213,
                            250,
                            62,
                            50,
                            224,
                            51,
                            86,
                            108,
                            170,
                            69,
                            175,
                            159,
                            207,
                            93,
                            58,
                            49,
                            30,
                            204,
                        ],
                    ),
                    phantom_secret: SecretKey(
                        #4c37b22d677ad8d8,
                    ),
                    phantom_node_id: PublicKey(
                        62fe0a59825cb4cf520904d0710dac6cc3a1164de248b8fe36f4a35966d6c55685675e056757b5d49c3ee0712783ca997ba2585b1b066c9d5f11bcf0d6fbbbf8,
                    ),
                },
                override_random_bytes: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218013,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                disable_revocation_policy_check: false,
                enforcement_states: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218014,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                expectations: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218015,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                unavailable_signers: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218016,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            node_signer: TestNodeSigner {
                node_secret: SecretKey(
                    #04e23f57764f0da5,
                ),
            },
            logger: TestLogger {
                level: Trace,
                id: "node 0",
                lines: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218009,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                context: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218010,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            message_recipients: Mutex {
                inner: Mutex {
                    data: {
                        PublicKey(
                            66074d25a751c4743342c90ad8ead9454daa00d9b9aed29bca321036d16c4b4dd036ed0d31bd98c1546bb6577f852e668442060feb7c256d8b20fed0a2ad3e2a,
                        ): ConnectedPeer(
                            [],
                        ),
                    },
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218020,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            secp_ctx: <secp256k1 context 0x7f5e64000e00, all capabilities>,
            message_router: TestMessageRouter,
            offers_handler: TestOffersMessageHandler,
            custom_handler: TestCustomMessageHandler {
                expected_messages: Mutex {
                    inner: Mutex {
                        data: [],
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218017,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
        },
        custom_message_handler: TestCustomMessageHandler {
            expected_messages: Mutex {
                inner: Mutex {
                    data: [],
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218017,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
    },
    MessengerNode {
        node_id: PublicKey(
            66074d25a751c4743342c90ad8ead9454daa00d9b9aed29bca321036d16c4b4dd036ed0d31bd98c1546bb6577f852e668442060feb7c256d8b20fed0a2ad3e2a,
        ),
        entropy_source: TestKeysInterface {
            backing: PhantomKeysManager {
                inner: KeysManager {
                    secp_ctx: <secp256k1 context 0x7f5e640040e0, all capabilities>,
                    node_secret: SecretKey(
                        #597567cc36675d0d,
                    ),
                    node_id: PublicKey(
                        236cdaa42692b2c9dcaa1e9755b09f01015badea0cbd02b6162d328a23d2f8550b2875c8c2a0382aa31936f841ca09946202c0c6d5177ed9a1234ff4969b49db,
                    ),
                    inbound_payment_key: KeyMaterial(
                        [
                            218,
                            54,
                            8,
                            139,
                            87,
                            95,
                            253,
                            119,
                            35,
                            70,
                            37,
                            0,
                            106,
                            154,
                            74,
                            24,
                            43,
                            188,
                            203,
                            20,
                            174,
                            180,
                            4,
                            28,
                            236,
                            88,
                            195,
                            23,
                            23,
                            121,
                            154,
                            227,
                        ],
                    ),
                    destination_script: Script(OP_0 OP_PUSHBYTES_20 8e0535b611153ef3f0963737a65bc447a32469a8),
                    shutdown_pubkey: PublicKey(
                        106160fb2f019f976a483c41c19d32fc4eacd8caa22fd5f7188c87bfe6d76934edecea6a5c30fae74c668895da465f719f356b04e8dadb0e0abdd56a9c525050,
                    ),
                    channel_master_key: ExtendedPrivKey {
                        network: Testnet,
                        depth: 1,
                        parent_fingerprint: 0x4ba43603,
                        child_number: Hardened {
                            index: 3,
                        },
                        private_key: SecretKey(
                            #09c93f6cd849983c,
                        ),
                        chain_code: 0xaa9df5e08653966926d540a5244fe0837f31cbb83aaeef2a68228992a322d0ca,
                    },
                    channel_child_index: 0,
                    entropy_source: RandomBytes {
                        seed: [
                            114,
                            225,
                            251,
                            140,
                            0,
                            167,
                            127,
                            163,
                            127,
                            59,
                            173,
                            129,
                            207,
                            166,
                            141,
                            31,
                            63,
                            138,
                            4,
                            191,
                            27,
                            239,
                            213,
                            211,
                            185,
                            163,
                            4,
                            164,
                            116,
                            54,
                            200,
                            36,
                        ],
                        index: AtomicCounter {
                            counter_low: 2,
                            counter_high: 1,
                        },
                    },
                    seed: [
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                        1,
                    ],
                    starting_time_secs: 1296688602,
                    starting_time_nanos: 0,
                },
                inbound_payment_key: KeyMaterial(
                    [
                        204,
                        163,
                        250,
                        128,
                        138,
                        222,
                        183,
                        229,
                        224,
                        210,
                        212,
                        4,
                        109,
                        95,
                        226,
                        58,
                        130,
                        28,
                        149,
                        67,
                        58,
                        126,
                        69,
                        175,
                        133,
                        165,
                        49,
                        221,
                        217,
                        17,
                        203,
                        54,
                    ],
                ),
                phantom_secret: SecretKey(
                    #ed3d1499c151be01,
                ),
                phantom_node_id: PublicKey(
                    cfb24b933b5b3516dbc45892e649b56ce1cb3c03036def993a777c304ff1b39953ecf735cc16672e7c3148459bd690413a629f6fca74f0770ab4cddf63be4226,
                ),
            },
            override_random_bytes: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218023,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            disable_revocation_policy_check: false,
            enforcement_states: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218024,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            expectations: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218025,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            unavailable_signers: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218026,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
        messenger: OnionMessenger {
            entropy_source: TestKeysInterface {
                backing: PhantomKeysManager {
                    inner: KeysManager {
                        secp_ctx: <secp256k1 context 0x7f5e640040e0, all capabilities>,
                        node_secret: SecretKey(
                            #597567cc36675d0d,
                        ),
                        node_id: PublicKey(
                            236cdaa42692b2c9dcaa1e9755b09f01015badea0cbd02b6162d328a23d2f8550b2875c8c2a0382aa31936f841ca09946202c0c6d5177ed9a1234ff4969b49db,
                        ),
                        inbound_payment_key: KeyMaterial(
                            [
                                218,
                                54,
                                8,
                                139,
                                87,
                                95,
                                253,
                                119,
                                35,
                                70,
                                37,
                                0,
                                106,
                                154,
                                74,
                                24,
                                43,
                                188,
                                203,
                                20,
                                174,
                                180,
                                4,
                                28,
                                236,
                                88,
                                195,
                                23,
                                23,
                                121,
                                154,
                                227,
                            ],
                        ),
                        destination_script: Script(OP_0 OP_PUSHBYTES_20 8e0535b611153ef3f0963737a65bc447a32469a8),
                        shutdown_pubkey: PublicKey(
                            106160fb2f019f976a483c41c19d32fc4eacd8caa22fd5f7188c87bfe6d76934edecea6a5c30fae74c668895da465f719f356b04e8dadb0e0abdd56a9c525050,
                        ),
                        channel_master_key: ExtendedPrivKey {
                            network: Testnet,
                            depth: 1,
                            parent_fingerprint: 0x4ba43603,
                            child_number: Hardened {
                                index: 3,
                            },
                            private_key: SecretKey(
                                #09c93f6cd849983c,
                            ),
                            chain_code: 0xaa9df5e08653966926d540a5244fe0837f31cbb83aaeef2a68228992a322d0ca,
                        },
                        channel_child_index: 0,
                        entropy_source: RandomBytes {
                            seed: [
                                114,
                                225,
                                251,
                                140,
                                0,
                                167,
                                127,
                                163,
                                127,
                                59,
                                173,
                                129,
                                207,
                                166,
                                141,
                                31,
                                63,
                                138,
                                4,
                                191,
                                27,
                                239,
                                213,
                                211,
                                185,
                                163,
                                4,
                                164,
                                116,
                                54,
                                200,
                                36,
                            ],
                            index: AtomicCounter {
                                counter_low: 2,
                                counter_high: 1,
                            },
                        },
                        seed: [
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                            1,
                        ],
                        starting_time_secs: 1296688602,
                        starting_time_nanos: 0,
                    },
                    inbound_payment_key: KeyMaterial(
                        [
                            204,
                            163,
                            250,
                            128,
                            138,
                            222,
                            183,
                            229,
                            224,
                            210,
                            212,
                            4,
                            109,
                            95,
                            226,
                            58,
                            130,
                            28,
                            149,
                            67,
                            58,
                            126,
                            69,
                            175,
                            133,
                            165,
                            49,
                            221,
                            217,
                            17,
                            203,
                            54,
                        ],
                    ),
                    phantom_secret: SecretKey(
                        #ed3d1499c151be01,
                    ),
                    phantom_node_id: PublicKey(
                        cfb24b933b5b3516dbc45892e649b56ce1cb3c03036def993a777c304ff1b39953ecf735cc16672e7c3148459bd690413a629f6fca74f0770ab4cddf63be4226,
                    ),
                },
                override_random_bytes: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218023,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                disable_revocation_policy_check: false,
                enforcement_states: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218024,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                expectations: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218025,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                unavailable_signers: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218026,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            node_signer: TestNodeSigner {
                node_secret: SecretKey(
                    #33f4cec88838cc84,
                ),
            },
            logger: TestLogger {
                level: Trace,
                id: "node 1",
                lines: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218021,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                context: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218022,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            message_recipients: Mutex {
                inner: Mutex {
                    data: {
                        PublicKey(
                            8f07ddd5e9f5179cff19486034181ed76505baaad53e5d994064127b56c5841bd1e8a8697ad42251de39f6a72081dfdf42abc542a6d6fe0715548b588fafbe70,
                        ): ConnectedPeer(
                            [],
                        ),
                        PublicKey(
                            37e31fcbbdbdc5c3449a7e533cc8a68fac67c827321323273d50348106e61f5358546af286730e3bd9924e52cd0f205a70ac475a67842aa81b481ee765c2929e,
                        ): ConnectedPeer(
                            [],
                        ),
                    },
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218028,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            secp_ctx: <secp256k1 context 0x7f5e64022280, all capabilities>,
            message_router: TestMessageRouter,
            offers_handler: TestOffersMessageHandler,
            custom_handler: TestCustomMessageHandler {
                expected_messages: Mutex {
                    inner: Mutex {
                        data: [],
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218027,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
        },
        custom_message_handler: TestCustomMessageHandler {
            expected_messages: Mutex {
                inner: Mutex {
                    data: [],
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218027,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
    },
    MessengerNode {
        node_id: PublicKey(
            37e31fcbbdbdc5c3449a7e533cc8a68fac67c827321323273d50348106e61f5358546af286730e3bd9924e52cd0f205a70ac475a67842aa81b481ee765c2929e,
        ),
        entropy_source: TestKeysInterface {
            backing: PhantomKeysManager {
                inner: KeysManager {
                    secp_ctx: <secp256k1 context 0x7f5e64004310, all capabilities>,
                    node_secret: SecretKey(
                        #970a5a14c5cece90,
                    ),
                    node_id: PublicKey(
                        ce1dc610d880181464ae9a76568387c1fd3839d8af69f74012d241f33d2e8f88c4e526dbe59946cf190e949a2c5f92bafcccce5aa9708d2455d18231162afeb5,
                    ),
                    inbound_payment_key: KeyMaterial(
                        [
                            58,
                            76,
                            117,
                            40,
                            156,
                            49,
                            180,
                            221,
                            3,
                            102,
                            10,
                            231,
                            184,
                            102,
                            56,
                            224,
                            24,
                            15,
                            51,
                            212,
                            88,
                            119,
                            242,
                            49,
                            145,
                            74,
                            83,
                            178,
                            217,
                            219,
                            13,
                            170,
                        ],
                    ),
                    destination_script: Script(OP_0 OP_PUSHBYTES_20 96f1652787d6269c8e83a5e7c1c5fb78df7c11a8),
                    shutdown_pubkey: PublicKey(
                        d8904787e86a0881e0447078bd26f46ec72f163f92012ddcb9f6259f95708cfd7c81e1812d9c19d1f2292bc86f188757539e547d370baf52c88ad8e0166acf76,
                    ),
                    channel_master_key: ExtendedPrivKey {
                        network: Testnet,
                        depth: 1,
                        parent_fingerprint: 0x8dfc9b34,
                        child_number: Hardened {
                            index: 3,
                        },
                        private_key: SecretKey(
                            #d7624282ca88001c,
                        ),
                        chain_code: 0xceedc3ba738e60910282a0df3cfdf38585f8c8e8f314d4d72dc785c7d0d18530,
                    },
                    channel_child_index: 0,
                    entropy_source: RandomBytes {
                        seed: [
                            170,
                            74,
                            174,
                            247,
                            227,
                            36,
                            254,
                            196,
                            22,
                            138,
                            167,
                            184,
                            59,
                            31,
                            253,
                            185,
                            117,
                            12,
                            61,
                            138,
                            71,
                            179,
                            211,
                            88,
                            83,
                            241,
                            236,
                            36,
                            114,
                            5,
                            25,
                            179,
                        ],
                        index: AtomicCounter {
                            counter_low: 2,
                            counter_high: 1,
                        },
                    },
                    seed: [
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                        2,
                    ],
                    starting_time_secs: 1296688602,
                    starting_time_nanos: 0,
                },
                inbound_payment_key: KeyMaterial(
                    [
                        208,
                        229,
                        135,
                        232,
                        65,
                        18,
                        142,
                        117,
                        162,
                        32,
                        41,
                        21,
                        15,
                        147,
                        255,
                        163,
                        14,
                        148,
                        106,
                        190,
                        36,
                        59,
                        138,
                        108,
                        35,
                        161,
                        41,
                        85,
                        87,
                        0,
                        40,
                        74,
                    ],
                ),
                phantom_secret: SecretKey(
                    #90b3a5c7b9851ffe,
                ),
                phantom_node_id: PublicKey(
                    7e725f8b0ff0742ba919c01b57b7bded72148a2e39d883a1de70bd7608658ab930aaa4508fd6f54299bdf73370efe26206004bae3a98d8ba74125004ea6b7ba3,
                ),
            },
            override_random_bytes: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218038,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            disable_revocation_policy_check: false,
            enforcement_states: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218039,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            expectations: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218040,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            unavailable_signers: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218041,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
        messenger: OnionMessenger {
            entropy_source: TestKeysInterface {
                backing: PhantomKeysManager {
                    inner: KeysManager {
                        secp_ctx: <secp256k1 context 0x7f5e64004310, all capabilities>,
                        node_secret: SecretKey(
                            #970a5a14c5cece90,
                        ),
                        node_id: PublicKey(
                            ce1dc610d880181464ae9a76568387c1fd3839d8af69f74012d241f33d2e8f88c4e526dbe59946cf190e949a2c5f92bafcccce5aa9708d2455d18231162afeb5,
                        ),
                        inbound_payment_key: KeyMaterial(
                            [
                                58,
                                76,
                                117,
                                40,
                                156,
                                49,
                                180,
                                221,
                                3,
                                102,
                                10,
                                231,
                                184,
                                102,
                                56,
                                224,
                                24,
                                15,
                                51,
                                212,
                                88,
                                119,
                                242,
                                49,
                                145,
                                74,
                                83,
                                178,
                                217,
                                219,
                                13,
                                170,
                            ],
                        ),
                        destination_script: Script(OP_0 OP_PUSHBYTES_20 96f1652787d6269c8e83a5e7c1c5fb78df7c11a8),
                        shutdown_pubkey: PublicKey(
                            d8904787e86a0881e0447078bd26f46ec72f163f92012ddcb9f6259f95708cfd7c81e1812d9c19d1f2292bc86f188757539e547d370baf52c88ad8e0166acf76,
                        ),
                        channel_master_key: ExtendedPrivKey {
                            network: Testnet,
                            depth: 1,
                            parent_fingerprint: 0x8dfc9b34,
                            child_number: Hardened {
                                index: 3,
                            },
                            private_key: SecretKey(
                                #d7624282ca88001c,
                            ),
                            chain_code: 0xceedc3ba738e60910282a0df3cfdf38585f8c8e8f314d4d72dc785c7d0d18530,
                        },
                        channel_child_index: 0,
                        entropy_source: RandomBytes {
                            seed: [
                                170,
                                74,
                                174,
                                247,
                                227,
                                36,
                                254,
                                196,
                                22,
                                138,
                                167,
                                184,
                                59,
                                31,
                                253,
                                185,
                                117,
                                12,
                                61,
                                138,
                                71,
                                179,
                                211,
                                88,
                                83,
                                241,
                                236,
                                36,
                                114,
                                5,
                                25,
                                179,
                            ],
                            index: AtomicCounter {
                                counter_low: 2,
                                counter_high: 1,
                            },
                        },
                        seed: [
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                            2,
                        ],
                        starting_time_secs: 1296688602,
                        starting_time_nanos: 0,
                    },
                    inbound_payment_key: KeyMaterial(
                        [
                            208,
                            229,
                            135,
                            232,
                            65,
                            18,
                            142,
                            117,
                            162,
                            32,
                            41,
                            21,
                            15,
                            147,
                            255,
                            163,
                            14,
                            148,
                            106,
                            190,
                            36,
                            59,
                            138,
                            108,
                            35,
                            161,
                            41,
                            85,
                            87,
                            0,
                            40,
                            74,
                        ],
                    ),
                    phantom_secret: SecretKey(
                        #90b3a5c7b9851ffe,
                    ),
                    phantom_node_id: PublicKey(
                        7e725f8b0ff0742ba919c01b57b7bded72148a2e39d883a1de70bd7608658ab930aaa4508fd6f54299bdf73370efe26206004bae3a98d8ba74125004ea6b7ba3,
                    ),
                },
                override_random_bytes: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218038,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                disable_revocation_policy_check: false,
                enforcement_states: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218039,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                expectations: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218040,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                unavailable_signers: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218041,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            node_signer: TestNodeSigner {
                node_secret: SecretKey(
                    #e9f13f0a0536a0d3,
                ),
            },
            logger: TestLogger {
                level: Trace,
                id: "node 2",
                lines: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218029,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                context: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218030,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            message_recipients: Mutex {
                inner: Mutex {
                    data: {
                        PublicKey(
                            66074d25a751c4743342c90ad8ead9454daa00d9b9aed29bca321036d16c4b4dd036ed0d31bd98c1546bb6577f852e668442060feb7c256d8b20fed0a2ad3e2a,
                        ): ConnectedPeer(
                            [],
                        ),
                        PublicKey(
                            0b5be51c72b8b5ef30e0e493a5c7e1102f5f08711a7514465139ad4aad792746f596a5b2eb56d72e1518cb8990acbf866a82ae725d45ea0b0042549f96079c19,
                        ): ConnectedPeer(
                            [],
                        ),
                    },
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218052,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            secp_ctx: <secp256k1 context 0x7f5e64016d30, all capabilities>,
            message_router: TestMessageRouter,
            offers_handler: TestOffersMessageHandler,
            custom_handler: TestCustomMessageHandler {
                expected_messages: Mutex {
                    inner: Mutex {
                        data: [],
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218042,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
        },
        custom_message_handler: TestCustomMessageHandler {
            expected_messages: Mutex {
                inner: Mutex {
                    data: [],
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218042,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
    },
    MessengerNode {
        node_id: PublicKey(
            0b5be51c72b8b5ef30e0e493a5c7e1102f5f08711a7514465139ad4aad792746f596a5b2eb56d72e1518cb8990acbf866a82ae725d45ea0b0042549f96079c19,
        ),
        entropy_source: TestKeysInterface {
            backing: PhantomKeysManager {
                inner: KeysManager {
                    secp_ctx: <secp256k1 context 0x7f5e64020050, all capabilities>,
                    node_secret: SecretKey(
                        #625a78c1f8c5dc10,
                    ),
                    node_id: PublicKey(
                        20d2f8e0dbf2a35a88a1d378c00dea8780b9b05de9a309f190a84eb1c6c41811774f44c336b4a807947d43abf537aa0e5ffaeacb267f56738f21d293a95c6874,
                    ),
                    inbound_payment_key: KeyMaterial(
                        [
                            112,
                            213,
                            164,
                            30,
                            222,
                            249,
                            34,
                            198,
                            233,
                            95,
                            14,
                            156,
                            137,
                            236,
                            15,
                            239,
                            237,
                            226,
                            15,
                            23,
                            95,
                            94,
                            57,
                            168,
                            207,
                            44,
                            61,
                            172,
                            168,
                            170,
                            177,
                            183,
                        ],
                    ),
                    destination_script: Script(OP_0 OP_PUSHBYTES_20 9f86df9a660cab41af294fabd93fc5a7013e2bc9),
                    shutdown_pubkey: PublicKey(
                        840c31667006edb31cf61d90e19336c99cc7a4c550663e3db2fbe15ded31268a1f50a622b35afa2dd67468b63ff910471f2b782169a9686b9e13e444a9e4febf,
                    ),
                    channel_master_key: ExtendedPrivKey {
                        network: Testnet,
                        depth: 1,
                        parent_fingerprint: 0x56c4fac3,
                        child_number: Hardened {
                            index: 3,
                        },
                        private_key: SecretKey(
                            #4e0f373f1faea612,
                        ),
                        chain_code: 0xd06040efa3eb307d2ca7ec45ba59198b344201af28730efa000f81cad8bf1de8,
                    },
                    channel_child_index: 0,
                    entropy_source: RandomBytes {
                        seed: [
                            194,
                            33,
                            167,
                            203,
                            209,
                            161,
                            159,
                            125,
                            7,
                            26,
                            77,
                            248,
                            145,
                            11,
                            155,
                            137,
                            62,
                            47,
                            141,
                            168,
                            50,
                            158,
                            217,
                            141,
                            67,
                            186,
                            163,
                            181,
                            87,
                            248,
                            145,
                            39,
                        ],
                        index: AtomicCounter {
                            counter_low: 2,
                            counter_high: 1,
                        },
                    },
                    seed: [
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                        3,
                    ],
                    starting_time_secs: 1296688602,
                    starting_time_nanos: 0,
                },
                inbound_payment_key: KeyMaterial(
                    [
                        95,
                        129,
                        52,
                        217,
                        208,
                        18,
                        56,
                        0,
                        113,
                        23,
                        155,
                        38,
                        81,
                        164,
                        142,
                        238,
                        120,
                        252,
                        56,
                        246,
                        105,
                        213,
                        250,
                        82,
                        122,
                        40,
                        82,
                        110,
                        88,
                        136,
                        222,
                        86,
                    ],
                ),
                phantom_secret: SecretKey(
                    #9918e88d35d1254b,
                ),
                phantom_node_id: PublicKey(
                    081729af848cb1cd25f9f71c778cd7e622f7b14732af909e0c56981f43d19b91e599217ec5a58d8bfc696f9d3f12f9890f7bcf2c23b7b3682cb4ba7b20118e42,
                ),
            },
            override_random_bytes: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218056,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            disable_revocation_policy_check: false,
            enforcement_states: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218057,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            expectations: Mutex {
                inner: Mutex {
                    data: None,
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218058,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            unavailable_signers: Mutex {
                inner: Mutex {
                    data: {},
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218059,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
        messenger: OnionMessenger {
            entropy_source: TestKeysInterface {
                backing: PhantomKeysManager {
                    inner: KeysManager {
                        secp_ctx: <secp256k1 context 0x7f5e64020050, all capabilities>,
                        node_secret: SecretKey(
                            #625a78c1f8c5dc10,
                        ),
                        node_id: PublicKey(
                            20d2f8e0dbf2a35a88a1d378c00dea8780b9b05de9a309f190a84eb1c6c41811774f44c336b4a807947d43abf537aa0e5ffaeacb267f56738f21d293a95c6874,
                        ),
                        inbound_payment_key: KeyMaterial(
                            [
                                112,
                                213,
                                164,
                                30,
                                222,
                                249,
                                34,
                                198,
                                233,
                                95,
                                14,
                                156,
                                137,
                                236,
                                15,
                                239,
                                237,
                                226,
                                15,
                                23,
                                95,
                                94,
                                57,
                                168,
                                207,
                                44,
                                61,
                                172,
                                168,
                                170,
                                177,
                                183,
                            ],
                        ),
                        destination_script: Script(OP_0 OP_PUSHBYTES_20 9f86df9a660cab41af294fabd93fc5a7013e2bc9),
                        shutdown_pubkey: PublicKey(
                            840c31667006edb31cf61d90e19336c99cc7a4c550663e3db2fbe15ded31268a1f50a622b35afa2dd67468b63ff910471f2b782169a9686b9e13e444a9e4febf,
                        ),
                        channel_master_key: ExtendedPrivKey {
                            network: Testnet,
                            depth: 1,
                            parent_fingerprint: 0x56c4fac3,
                            child_number: Hardened {
                                index: 3,
                            },
                            private_key: SecretKey(
                                #4e0f373f1faea612,
                            ),
                            chain_code: 0xd06040efa3eb307d2ca7ec45ba59198b344201af28730efa000f81cad8bf1de8,
                        },
                        channel_child_index: 0,
                        entropy_source: RandomBytes {
                            seed: [
                                194,
                                33,
                                167,
                                203,
                                209,
                                161,
                                159,
                                125,
                                7,
                                26,
                                77,
                                248,
                                145,
                                11,
                                155,
                                137,
                                62,
                                47,
                                141,
                                168,
                                50,
                                158,
                                217,
                                141,
                                67,
                                186,
                                163,
                                181,
                                87,
                                248,
                                145,
                                39,
                            ],
                            index: AtomicCounter {
                                counter_low: 2,
                                counter_high: 1,
                            },
                        },
                        seed: [
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                            3,
                        ],
                        starting_time_secs: 1296688602,
                        starting_time_nanos: 0,
                    },
                    inbound_payment_key: KeyMaterial(
                        [
                            95,
                            129,
                            52,
                            217,
                            208,
                            18,
                            56,
                            0,
                            113,
                            23,
                            155,
                            38,
                            81,
                            164,
                            142,
                            238,
                            120,
                            252,
                            56,
                            246,
                            105,
                            213,
                            250,
                            82,
                            122,
                            40,
                            82,
                            110,
                            88,
                            136,
                            222,
                            86,
                        ],
                    ),
                    phantom_secret: SecretKey(
                        #9918e88d35d1254b,
                    ),
                    phantom_node_id: PublicKey(
                        081729af848cb1cd25f9f71c778cd7e622f7b14732af909e0c56981f43d19b91e599217ec5a58d8bfc696f9d3f12f9890f7bcf2c23b7b3682cb4ba7b20118e42,
                    ),
                },
                override_random_bytes: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218056,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                disable_revocation_policy_check: false,
                enforcement_states: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218057,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                expectations: Mutex {
                    inner: Mutex {
                        data: None,
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218058,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                unavailable_signers: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218059,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            node_signer: TestNodeSigner {
                node_secret: SecretKey(
                    #3b5ebfc7b79f407c,
                ),
            },
            logger: TestLogger {
                level: Trace,
                id: "node 3",
                lines: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218053,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
                context: Mutex {
                    inner: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218054,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
            message_recipients: Mutex {
                inner: Mutex {
                    data: {
                        PublicKey(
                            37e31fcbbdbdc5c3449a7e533cc8a68fac67c827321323273d50348106e61f5358546af286730e3bd9924e52cd0f205a70ac475a67842aa81b481ee765c2929e,
                        ): ConnectedPeer(
                            [],
                        ),
                    },
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218065,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
            secp_ctx: <secp256k1 context 0x7f5e64020250, all capabilities>,
            message_router: TestMessageRouter,
            offers_handler: TestOffersMessageHandler,
            custom_handler: TestCustomMessageHandler {
                expected_messages: Mutex {
                    inner: Mutex {
                        data: [],
                        poisoned: false,
                        ..
                    },
                    deps: LockMetadata {
                        lock_idx: 218060,
                        locked_before: Mutex {
                            data: {},
                            poisoned: false,
                            ..
                        },
                        _lock_construction_bt: Backtrace,
                    },
                },
            },
        },
        custom_message_handler: TestCustomMessageHandler {
            expected_messages: Mutex {
                inner: Mutex {
                    data: [],
                    poisoned: false,
                    ..
                },
                deps: LockMetadata {
                    lock_idx: 218060,
                    locked_before: Mutex {
                        data: {},
                        poisoned: false,
                        ..
                    },
                    _lock_construction_bt: Backtrace,
                },
            },
        },
    },
]

[jkczyz]

Hey @TheBlueMatt I was looking at the unit test reply_path and was curious about the following

• How do we get to know if a node is onion node or not ? I have tried looking at the nodes by debugging it (attaching o/p below) but it got overwhelming at first sight to figure out the field which can help out.
• Where do we filter them out ? I guess in new_for_message ?

Completely new to lightening protocol technically.

This needs to be done prior to calling new_for_message, as BlindedPath doesn't carry the necessary information. I actually have a draft of this locally as I'm touching the necessary code in another PR. Sorry, should have assigned this issue to myself.

[Harshil-Jani]

This needs to be done prior to calling new_for_message, as BlindedPath doesn't carry the necessary information. I actually have a draft of this locally as I'm touching the necessary code in another PR. Sorry, should have assigned this issue to myself.

No worries. Still curious about how would the nodes be differentiated ? Any whitepaper or resource ? Or in case if that anywhere in Mastering the Lightning Network Book I can come across the chapter real soon.

[jkczyz]

No worries. Still curious about how would the nodes be differentiated ? Any whitepaper or resource ? Or in case if that anywhere in Mastering the Lightning Network Book I can come across the chapter real soon.

Sure! When a node_announcement is gossiped, it may contain addresses needed to reach the node.

https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-node_announcement-message

These announcements can be obtained using LDK's NetworkGraph.

https://docs.rs/lightning/latest/lightning/routing/gossip/struct.NetworkGraph.html