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