Check custom_tlvs in Event::PaymentClaimed
[rust-lightning] / lightning / src / ln / payment_tests.rs
index 87952a1bbdf50dc3af6d8f18b722dff15ccf7d13..fdc44dee7b83b8140c6c2280e007058f38cb2c42 100644 (file)
 //! serialization ordering between ChannelManager/ChannelMonitors and ensuring we can still retry
 //! payments thereafter.
 
-use crate::chain::{ChannelMonitorUpdateStatus, Confirm, Listen, Watch};
+use crate::chain::{ChannelMonitorUpdateStatus, Confirm, Listen};
 use crate::chain::channelmonitor::{ANTI_REORG_DELAY, HTLC_FAIL_BACK_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS};
 use crate::sign::EntropySource;
-use crate::chain::transaction::OutPoint;
 use crate::events::{ClosureReason, Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PathFailure, PaymentFailureReason, PaymentPurpose};
 use crate::ln::channel::{EXPIRE_PREV_CONFIG_TICKS, commit_tx_fee_msat, get_holder_selected_channel_reserve_satoshis, ANCHOR_OUTPUT_VALUE_SATOSHI};
 use crate::ln::channelmanager::{BREAKDOWN_TIMEOUT, MPP_TIMEOUT_TICKS, MIN_CLTV_EXPIRY_DELTA, PaymentId, PaymentSendFailure, RecentPaymentDetails, RecipientOnionFields, HTLCForwardInfo, PendingHTLCRouting, PendingAddHTLCInfo};
 use crate::ln::features::{Bolt11InvoiceFeatures, ChannelTypeFeatures};
-use crate::ln::{msgs, ChannelId, PaymentSecret, PaymentPreimage};
+use crate::ln::msgs;
+use crate::ln::types::{ChannelId, PaymentHash, PaymentSecret, PaymentPreimage};
 use crate::ln::msgs::ChannelMessageHandler;
+use crate::ln::onion_utils;
 use crate::ln::outbound_payment::{IDEMPOTENCY_TIMEOUT_TICKS, Retry};
 use crate::routing::gossip::{EffectiveCapacity, RoutingFees};
 use crate::routing::router::{get_route, Path, PaymentParameters, Route, Router, RouteHint, RouteHintHop, RouteHop, RouteParameters, find_route};
@@ -31,16 +32,21 @@ use crate::util::errors::APIError;
 use crate::util::ser::Writeable;
 use crate::util::string::UntrustedString;
 
+use bitcoin::hashes::Hash;
+use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::network::constants::Network;
+use bitcoin::secp256k1::{Secp256k1, SecretKey};
 
 use crate::prelude::*;
 
+use crate::ln::functional_test_utils;
 use crate::ln::functional_test_utils::*;
 use crate::routing::gossip::NodeId;
+
 #[cfg(feature = "std")]
 use {
        crate::util::time::tests::SinceEpoch,
-       std::time::{SystemTime, Instant, Duration}
+       std::time::{SystemTime, Instant, Duration},
 };
 
 #[test]
@@ -154,7 +160,9 @@ fn mpp_retry() {
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
        pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 2_000_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
+       claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], payment_preimage)
+       );
 }
 
 #[test]
@@ -271,10 +279,12 @@ fn mpp_retry_overpay() {
 
        // Can't use claim_payment_along_route as it doesn't support overpayment, so we break out the
        // individual steps here.
+       nodes[3].node.claim_funds(payment_preimage);
        let extra_fees = vec![0, total_overpaid_amount];
-       let expected_total_fee_msat = do_claim_payment_along_route_with_extra_penultimate_hop_fees(
-               &nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], &extra_fees[..], false,
-               payment_preimage);
+       let expected_route = &[&[&nodes[1], &nodes[3]][..], &[&nodes[2], &nodes[3]][..]];
+       let args = ClaimAlongRouteArgs::new(&nodes[0], &expected_route[..], payment_preimage)
+               .with_expected_min_htlc_overpay(extra_fees);
+       let expected_total_fee_msat = pass_claimed_payment_along_route(args);
        expect_payment_sent!(&nodes[0], payment_preimage, Some(expected_total_fee_msat));
 }
 
@@ -343,7 +353,9 @@ fn do_mpp_receive_timeout(send_partial_mpp: bool) {
                        nodes[3].node.timer_tick_occurred();
                }
 
-               claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
+               claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], payment_preimage)
+               );
        }
 }
 
@@ -377,7 +389,7 @@ fn do_test_keysend_payments(public_node: bool, with_retry: bool) {
        let route_params = RouteParameters::from_payment_params_and_value(
                PaymentParameters::for_keysend(payee_pubkey, 40, false), 10000);
 
-       let network_graph = nodes[0].network_graph.clone();
+       let network_graph = nodes[0].network_graph;
        let channels = nodes[0].node.list_usable_channels();
        let first_hops = channels.iter().collect::<Vec<_>>();
        let first_hops = if public_node { None } else { Some(first_hops.as_slice()) };
@@ -429,7 +441,7 @@ fn test_mpp_keysend() {
        create_announced_chan_between_nodes(&nodes, 0, 2);
        create_announced_chan_between_nodes(&nodes, 1, 3);
        create_announced_chan_between_nodes(&nodes, 2, 3);
-       let network_graph = nodes[0].network_graph.clone();
+       let network_graph = nodes[0].network_graph;
 
        let payer_pubkey = nodes[0].node.get_our_node_id();
        let payee_pubkey = nodes[3].node.get_our_node_id();
@@ -458,7 +470,9 @@ fn test_mpp_keysend() {
        let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
        pass_along_path(&nodes[0], expected_route[1], recv_value, payment_hash.clone(),
                Some(payment_secret), ev.clone(), true, Some(payment_preimage));
-       claim_payment_along_route(&nodes[0], expected_route, false, payment_preimage);
+       claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], expected_route, payment_preimage)
+       );
 }
 
 #[test]
@@ -633,7 +647,7 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        let nodes_0_deserialized;
        let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 
-       let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1).2;
+       let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 1);
        let (_, _, chan_id_2, _) = create_announced_chan_between_nodes(&nodes, 1, 2);
 
        // Serialize the ChannelManager prior to sending payments
@@ -745,14 +759,21 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        assert_eq!(nodes[0].node.list_usable_channels().len(), 1);
 
        mine_transaction(&nodes[1], &as_commitment_tx);
-       let bs_htlc_claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
-       assert_eq!(bs_htlc_claim_txn.len(), 1);
-       check_spends!(bs_htlc_claim_txn[0], as_commitment_tx);
+       let bs_htlc_claim_txn = {
+               let mut txn = nodes[1].tx_broadcaster.unique_txn_broadcast();
+               assert_eq!(txn.len(), 2);
+               check_spends!(txn[0], funding_tx);
+               check_spends!(txn[1], as_commitment_tx);
+               txn.pop().unwrap()
+       };
 
        if !confirm_before_reload {
                mine_transaction(&nodes[0], &as_commitment_tx);
+               let txn = nodes[0].tx_broadcaster.unique_txn_broadcast();
+               assert_eq!(txn.len(), 1);
+               assert_eq!(txn[0].txid(), as_commitment_tx.txid());
        }
-       mine_transaction(&nodes[0], &bs_htlc_claim_txn[0]);
+       mine_transaction(&nodes[0], &bs_htlc_claim_txn);
        expect_payment_sent(&nodes[0], payment_preimage_1, None, true, false);
        connect_blocks(&nodes[0], TEST_FINAL_CLTV*4 + 20);
        let (first_htlc_timeout_tx, second_htlc_timeout_tx) = {
@@ -762,7 +783,7 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        };
        check_spends!(first_htlc_timeout_tx, as_commitment_tx);
        check_spends!(second_htlc_timeout_tx, as_commitment_tx);
-       if first_htlc_timeout_tx.input[0].previous_output == bs_htlc_claim_txn[0].input[0].previous_output {
+       if first_htlc_timeout_tx.input[0].previous_output == bs_htlc_claim_txn.input[0].previous_output {
                confirm_transaction(&nodes[0], &second_htlc_timeout_tx);
        } else {
                confirm_transaction(&nodes[0], &first_htlc_timeout_tx);
@@ -802,7 +823,9 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
        pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
-       do_claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+       do_claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+       );
        expect_payment_sent!(nodes[0], payment_preimage, Some(new_route.paths[0].hops[0].fee_msat));
 }
 
@@ -914,19 +937,23 @@ fn do_test_completed_payment_not_retryable_on_reload(use_dust: bool) {
        // the HTLC-Timeout transaction beyond 1 conf). For dust HTLCs, the HTLC is considered resolved
        // after the commitment transaction, so always connect the commitment transaction.
        mine_transaction(&nodes[0], &bs_commitment_tx[0]);
+       if nodes[0].connect_style.borrow().updates_best_block_first() {
+               let _ = nodes[0].tx_broadcaster.txn_broadcast();
+       }
        mine_transaction(&nodes[1], &bs_commitment_tx[0]);
        if !use_dust {
                connect_blocks(&nodes[0], TEST_FINAL_CLTV + (MIN_CLTV_EXPIRY_DELTA as u32));
                connect_blocks(&nodes[1], TEST_FINAL_CLTV + (MIN_CLTV_EXPIRY_DELTA as u32));
                let as_htlc_timeout = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
-               check_spends!(as_htlc_timeout[0], bs_commitment_tx[0]);
                assert_eq!(as_htlc_timeout.len(), 1);
+               check_spends!(as_htlc_timeout[0], bs_commitment_tx[0]);
 
                mine_transaction(&nodes[0], &as_htlc_timeout[0]);
-               // nodes[0] may rebroadcast (or RBF-bump) its HTLC-Timeout, so wipe the announced set.
-               nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
                mine_transaction(&nodes[1], &as_htlc_timeout[0]);
        }
+       if nodes[0].connect_style.borrow().updates_best_block_first() {
+               let _ = nodes[0].tx_broadcaster.txn_broadcast();
+       }
 
        // Create a new channel on which to retry the payment before we fail the payment via the
        // HTLC-Timeout transaction. This avoids ChannelManager timing out the payment due to us
@@ -1011,16 +1038,15 @@ fn test_completed_payment_not_retryable_on_reload() {
        do_test_completed_payment_not_retryable_on_reload(false);
 }
 
-
-fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, confirm_commitment_tx: bool, payment_timeout: bool) {
+fn do_test_dup_htlc_onchain_doesnt_fail_on_reload(persist_manager_post_event: bool, confirm_commitment_tx: bool, payment_timeout: bool) {
        // When a Channel is closed, any outbound HTLCs which were relayed through it are simply
-       // dropped when the Channel is. From there, the ChannelManager relies on the ChannelMonitor
-       // having a copy of the relevant fail-/claim-back data and processes the HTLC fail/claim when
-       // the ChannelMonitor tells it to.
+       // dropped. From there, the ChannelManager relies on the ChannelMonitor having a copy of the
+       // relevant fail-/claim-back data and processes the HTLC fail/claim when the ChannelMonitor tells
+       // it to.
        //
-       // If, due to an on-chain event, an HTLC is failed/claimed, we should avoid providing the
-       // ChannelManager the HTLC event until after the monitor is re-persisted. This should prevent a
-       // duplicate HTLC fail/claim (e.g. via a PaymentPathFailed event).
+       // If, due to an on-chain event, an HTLC is failed/claimed, we provide the
+       // ChannelManager with the HTLC event without waiting for ChannelMonitor persistence.
+       // This might generate duplicate HTLC fail/claim (e.g. via a PaymentPathFailed event) on reload.
        let chanmon_cfgs = create_chanmon_cfgs(2);
        let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
        let persister;
@@ -1044,32 +1070,36 @@ fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, co
 
        // Connect blocks until the CLTV timeout is up so that we get an HTLC-Timeout transaction
        connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
-       let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
-       assert_eq!(node_txn.len(), 3);
-       assert_eq!(node_txn[0].txid(), node_txn[1].txid());
-       check_spends!(node_txn[1], funding_tx);
-       check_spends!(node_txn[2], node_txn[1]);
-       let timeout_txn = vec![node_txn[2].clone()];
+       let (commitment_tx, htlc_timeout_tx) = {
+               let mut txn = nodes[0].tx_broadcaster.unique_txn_broadcast();
+               assert_eq!(txn.len(), 2);
+               check_spends!(txn[0], funding_tx);
+               check_spends!(txn[1], txn[0]);
+               (txn.remove(0), txn.remove(0))
+       };
 
        nodes[1].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[1], 1);
        expect_payment_claimed!(nodes[1], payment_hash, 10_000_000);
 
-       connect_block(&nodes[1], &create_dummy_block(nodes[1].best_block_hash(), 42, vec![node_txn[1].clone()]));
+       mine_transaction(&nodes[1], &commitment_tx);
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
        check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 100000);
-       let claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
-       assert_eq!(claim_txn.len(), 1);
-       check_spends!(claim_txn[0], node_txn[1]);
+       let htlc_success_tx = {
+               let mut txn = nodes[1].tx_broadcaster.txn_broadcast();
+               assert_eq!(txn.len(), 1);
+               check_spends!(txn[0], commitment_tx);
+               txn.pop().unwrap()
+       };
 
-       connect_block(&nodes[0], &create_dummy_block(nodes[0].best_block_hash(), 42, vec![node_txn[1].clone()]));
+       mine_transaction(&nodes[0], &commitment_tx);
 
        if confirm_commitment_tx {
                connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32 - 1);
        }
 
-       let claim_block = create_dummy_block(nodes[0].best_block_hash(), 42, if payment_timeout { timeout_txn } else { vec![claim_txn[0].clone()] });
+       let claim_block = create_dummy_block(nodes[0].best_block_hash(), 42, if payment_timeout { vec![htlc_timeout_tx] } else { vec![htlc_success_tx] });
 
        if payment_timeout {
                assert!(confirm_commitment_tx); // Otherwise we're spending below our CSV!
@@ -1080,7 +1110,6 @@ fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, co
        // Now connect the HTLC claim transaction with the ChainMonitor-generated ChannelMonitor update
        // returning InProgress. This should cause the claim event to never make its way to the
        // ChannelManager.
-       chanmon_cfgs[0].persister.chain_sync_monitor_persistences.lock().unwrap().clear();
        chanmon_cfgs[0].persister.set_update_ret(ChannelMonitorUpdateStatus::InProgress);
 
        if payment_timeout {
@@ -1089,14 +1118,9 @@ fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, co
                connect_block(&nodes[0], &claim_block);
        }
 
-       let funding_txo = OutPoint { txid: funding_tx.txid(), index: 0 };
-       let mon_updates: Vec<_> = chanmon_cfgs[0].persister.chain_sync_monitor_persistences.lock().unwrap()
-               .get_mut(&funding_txo).unwrap().drain().collect();
-       // If we are using chain::Confirm instead of chain::Listen, we will get the same update twice.
-       // If we're testing connection idempotency we may get substantially more.
-       assert!(mon_updates.len() >= 1);
-       assert!(nodes[0].chain_monitor.release_pending_monitor_events().is_empty());
-       assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
+       // Note that we skip persisting ChannelMonitors. We should still be generating the payment sent
+       // event without ChannelMonitor persistence. If we reset to a previous state on reload, the block
+       // should be replayed and we'll regenerate the event.
 
        // If we persist the ChannelManager here, we should get the PaymentSent event after
        // deserialization.
@@ -1105,13 +1129,7 @@ fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, co
                chan_manager_serialized = nodes[0].node.encode();
        }
 
-       // Now persist the ChannelMonitor and inform the ChainMonitor that we're done, generating the
-       // payment sent event.
-       chanmon_cfgs[0].persister.set_update_ret(ChannelMonitorUpdateStatus::Completed);
        let chan_0_monitor_serialized = get_monitor!(nodes[0], chan_id).encode();
-       for update in mon_updates {
-               nodes[0].chain_monitor.chain_monitor.channel_monitor_updated(funding_txo, update).unwrap();
-       }
        if payment_timeout {
                expect_payment_failed!(nodes[0], payment_hash, false);
        } else {
@@ -1145,13 +1163,13 @@ fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, co
 }
 
 #[test]
-fn test_dup_htlc_onchain_fails_on_reload() {
-       do_test_dup_htlc_onchain_fails_on_reload(true, true, true);
-       do_test_dup_htlc_onchain_fails_on_reload(true, true, false);
-       do_test_dup_htlc_onchain_fails_on_reload(true, false, false);
-       do_test_dup_htlc_onchain_fails_on_reload(false, true, true);
-       do_test_dup_htlc_onchain_fails_on_reload(false, true, false);
-       do_test_dup_htlc_onchain_fails_on_reload(false, false, false);
+fn test_dup_htlc_onchain_doesnt_fail_on_reload() {
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(true, true, true);
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(true, true, false);
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(true, false, false);
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(false, true, true);
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(false, true, false);
+       do_test_dup_htlc_onchain_doesnt_fail_on_reload(false, false, false);
 }
 
 #[test]
@@ -1235,7 +1253,9 @@ fn get_ldk_payment_preimage() {
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
        pass_along_path(&nodes[0], &[&nodes[1]], amt_msat, payment_hash, Some(payment_secret), events.pop().unwrap(), true, Some(payment_preimage));
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1]]], false, payment_preimage);
+       claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1]]], payment_preimage)
+       );
 }
 
 #[test]
@@ -1279,7 +1299,7 @@ fn successful_probe_yields_event() {
        create_announced_chan_between_nodes(&nodes, 1, 2);
 
        let recv_value = 100_000;
-       let (route, payment_hash, _, _) = get_route_and_payment_hash!(&nodes[0], nodes[2], recv_value);
+       let (route, _, _, _) = get_route_and_payment_hash!(&nodes[0], nodes[2], recv_value);
 
        let res = nodes[0].node.send_probe(route.paths[0].clone()).unwrap();
 
@@ -1569,7 +1589,9 @@ fn claimed_send_payment_idempotent() {
        // Claim the payment backwards, but note that the PaymentSent event is still pending and has
        // not been seen by the user. At this point, from the user perspective nothing has changed, so
        // we must remain just as idempotent as we were before.
-       do_claim_payment_along_route(&nodes[0], &[&[&nodes[1]]], false, first_payment_preimage);
+       do_claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1]]], first_payment_preimage)
+       );
 
        for _ in 0..=IDEMPOTENCY_TIMEOUT_TICKS {
                nodes[0].node.timer_tick_occurred();
@@ -1970,7 +1992,9 @@ fn do_test_intercepted_payment(test: InterceptTest) {
 
                let payment_preimage = nodes[2].node.get_payment_preimage(payment_hash, payment_secret).unwrap();
                expect_payment_claimable!(&nodes[2], payment_hash, payment_secret, amt_msat, Some(payment_preimage), nodes[2].node.get_our_node_id());
-               do_claim_payment_along_route(&nodes[0], &vec!(&vec!(&nodes[1], &nodes[2])[..]), false, payment_preimage);
+               do_claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+               );
                let events = nodes[0].node.get_and_clear_pending_events();
                assert_eq!(events.len(), 2);
                match events[0] {
@@ -2119,9 +2143,11 @@ fn do_accept_underpaying_htlcs_config(num_mpp_parts: usize) {
                        assert_eq!(skimmed_fee_msat * num_mpp_parts as u64, counterparty_skimmed_fee_msat);
                        assert_eq!(nodes[2].node.get_our_node_id(), receiver_node_id.unwrap());
                        match purpose {
-                               crate::events::PaymentPurpose::InvoicePayment { payment_preimage: ev_payment_preimage,
-                                       payment_secret: ev_payment_secret, .. } =>
-                               {
+                               crate::events::PaymentPurpose::Bolt11InvoicePayment {
+                                       payment_preimage: ev_payment_preimage,
+                                       payment_secret: ev_payment_secret,
+                                       ..
+                               } => {
                                        assert_eq!(payment_preimage, ev_payment_preimage.unwrap());
                                        assert_eq!(payment_secret, *ev_payment_secret);
                                },
@@ -2134,9 +2160,10 @@ fn do_accept_underpaying_htlcs_config(num_mpp_parts: usize) {
        let mut expected_paths = Vec::new();
        for _ in 0..num_mpp_parts { expected_paths_vecs.push(vec!(&nodes[1], &nodes[2])); }
        for i in 0..num_mpp_parts { expected_paths.push(&expected_paths_vecs[i][..]); }
-       let total_fee_msat = do_claim_payment_along_route_with_extra_penultimate_hop_fees(
-               &nodes[0], &expected_paths[..], &vec![skimmed_fee_msat as u32; num_mpp_parts][..], false,
-               payment_preimage);
+       expected_paths[0].last().unwrap().node.claim_funds(payment_preimage);
+       let args = ClaimAlongRouteArgs::new(&nodes[0], &expected_paths[..], payment_preimage)
+               .with_expected_extra_fees(vec![skimmed_fee_msat as u32; num_mpp_parts]);
+       let total_fee_msat = pass_claimed_payment_along_route(args);
        // The sender doesn't know that the penultimate hop took an extra fee.
        expect_payment_sent(&nodes[0], payment_preimage,
                Some(Some(total_fee_msat - skimmed_fee_msat * num_mpp_parts as u64)), true, true);
@@ -2257,7 +2284,9 @@ fn do_automatic_retries(test: AutoRetry) {
                let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(msg_events.len(), 1);
                pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], amt_msat, payment_hash, Some(payment_secret), msg_events.pop().unwrap(), true, None);
-               claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+               claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+               );
        } else if test == AutoRetry::Spontaneous {
                nodes[0].node.send_spontaneous_payment_with_retry(Some(payment_preimage),
                        RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params,
@@ -2274,7 +2303,9 @@ fn do_automatic_retries(test: AutoRetry) {
                let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(msg_events.len(), 1);
                pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], amt_msat, payment_hash, None, msg_events.pop().unwrap(), true, Some(payment_preimage));
-               claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+               claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+               );
        } else if test == AutoRetry::FailAttempts {
                // Ensure ChannelManager will not retry a payment if it has run out of payment attempts.
                nodes[0].node.send_payment(payment_hash, RecipientOnionFields::secret_only(payment_secret),
@@ -2294,7 +2325,7 @@ fn do_automatic_retries(test: AutoRetry) {
                let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(msg_events.len(), 0);
        } else if test == AutoRetry::FailTimeout {
-               #[cfg(not(feature = "no-std"))] {
+               #[cfg(feature = "std")] {
                        // Ensure ChannelManager will not retry a payment if it times out due to Retry::Timeout.
                        nodes[0].node.send_payment(payment_hash, RecipientOnionFields::secret_only(payment_secret),
                                PaymentId(payment_hash.0), route_params, Retry::Timeout(Duration::from_secs(60))).unwrap();
@@ -3334,6 +3365,7 @@ fn test_threaded_payment_retries() {
                // We really want std::thread::scope, but its not stable until 1.63. Until then, we get unsafe.
                let node_ref = NodePtr::from_node(&nodes[0]);
                move || {
+                       let _ = &node_ref;
                        let node_a = unsafe { &*node_ref.0 };
                        while Instant::now() < end_time {
                                node_a.node.get_and_clear_pending_events(); // wipe the PendingHTLCsForwardable
@@ -3700,11 +3732,17 @@ fn do_test_custom_tlvs(spontaneous: bool, even_tlvs: bool, known_tlvs: bool) {
        match (known_tlvs, even_tlvs) {
                (true, _) => {
                        nodes[1].node.claim_funds_with_known_custom_tlvs(our_payment_preimage);
-                       let expected_total_fee_msat = pass_claimed_payment_along_route(&nodes[0], &[&[&nodes[1]]], &[0; 1], false, our_payment_preimage);
+                       let expected_total_fee_msat = pass_claimed_payment_along_route(
+                               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1]]], our_payment_preimage)
+                                       .with_custom_tlvs(custom_tlvs)
+                       );
                        expect_payment_sent!(&nodes[0], our_payment_preimage, Some(expected_total_fee_msat));
                },
                (false, false) => {
-                       claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
+                       claim_payment_along_route(
+                               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1]]], our_payment_preimage)
+                                       .with_custom_tlvs(custom_tlvs)
+                       );
                },
                (false, true) => {
                        nodes[1].node.claim_funds(our_payment_preimage);
@@ -3788,15 +3826,15 @@ fn test_retry_custom_tlvs() {
        check_added_monitors!(nodes[0], 1);
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
-       let payment_claimable = pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000,
-               payment_hash, Some(payment_secret), events.pop().unwrap(), true, None).unwrap();
-       match payment_claimable {
-               Event::PaymentClaimable { onion_fields, .. } => {
-                       assert_eq!(&onion_fields.unwrap().custom_tlvs()[..], &custom_tlvs[..]);
-               },
-               _ => panic!("Unexpected event"),
-       };
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+       let path = &[&nodes[1], &nodes[2]];
+       let args = PassAlongPathArgs::new(&nodes[0], path, 1_000_000, payment_hash, events.pop().unwrap())
+               .with_payment_secret(payment_secret)
+               .with_custom_tlvs(custom_tlvs.clone());
+       do_pass_along_path(args);
+       claim_payment_along_route(
+               ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+                       .with_custom_tlvs(custom_tlvs)
+       );
 }
 
 #[test]
@@ -3927,8 +3965,10 @@ fn do_test_custom_tlvs_consistency(first_tlvs: Vec<(u64, Vec<u8>)>, second_tlvs:
                        _ => panic!("Unexpected event"),
                }
 
-               do_claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]],
-                       false, our_payment_preimage);
+               do_claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], our_payment_preimage)
+                               .with_custom_tlvs(expected_tlvs)
+               );
                expect_payment_sent(&nodes[0], our_payment_preimage, Some(Some(2000)), true, true);
        } else {
                // Expect fail back
@@ -4091,7 +4131,9 @@ fn do_test_payment_metadata_consistency(do_reload: bool, do_modify: bool) {
        } else {
                expect_pending_htlcs_forwardable!(nodes[3]);
                expect_payment_claimable!(nodes[3], payment_hash, payment_secret, amt_msat);
-               claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
+               claim_payment_along_route(
+                       ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], payment_preimage)
+               );
        }
 }
 
@@ -4194,3 +4236,59 @@ fn  test_htlc_forward_considers_anchor_outputs_value() {
        check_closed_broadcast(&nodes[2], 1, true);
        check_added_monitors(&nodes[2], 1);
 }
+
+#[test]
+fn peel_payment_onion_custom_tlvs() {
+       let chanmon_cfgs = create_chanmon_cfgs(2);
+       let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
+       let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
+       let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+       create_announced_chan_between_nodes(&nodes, 0, 1);
+       let secp_ctx = Secp256k1::new();
+
+       let amt_msat = 1000;
+       let payment_params = PaymentParameters::for_keysend(nodes[1].node.get_our_node_id(),
+               TEST_FINAL_CLTV, false);
+       let route_params = RouteParameters::from_payment_params_and_value(payment_params, amt_msat);
+       let route = functional_test_utils::get_route(&nodes[0], &route_params).unwrap();
+       let mut recipient_onion = RecipientOnionFields::spontaneous_empty()
+               .with_custom_tlvs(vec![(414141, vec![42; 1200])]).unwrap();
+       let prng_seed = chanmon_cfgs[0].keys_manager.get_secure_random_bytes();
+       let session_priv = SecretKey::from_slice(&prng_seed[..]).expect("RNG is busted");
+       let keysend_preimage = PaymentPreimage([42; 32]);
+       let payment_hash = PaymentHash(Sha256::hash(&keysend_preimage.0).to_byte_array());
+
+       let (onion_routing_packet, first_hop_msat, cltv_expiry) = onion_utils::create_payment_onion(
+               &secp_ctx, &route.paths[0], &session_priv, amt_msat, &recipient_onion,
+               nodes[0].best_block_info().1, &payment_hash, &Some(keysend_preimage), prng_seed
+       ).unwrap();
+
+       let update_add = msgs::UpdateAddHTLC {
+               channel_id: ChannelId([0; 32]),
+               htlc_id: 42,
+               amount_msat: first_hop_msat,
+               payment_hash,
+               cltv_expiry,
+               skimmed_fee_msat: None,
+               onion_routing_packet,
+               blinding_point: None,
+       };
+       let peeled_onion = crate::ln::onion_payment::peel_payment_onion(
+               &update_add, &&chanmon_cfgs[1].keys_manager, &&chanmon_cfgs[1].logger, &secp_ctx,
+               nodes[1].best_block_info().1, true, false
+       ).unwrap();
+       assert_eq!(peeled_onion.incoming_amt_msat, Some(amt_msat));
+       match peeled_onion.routing {
+               PendingHTLCRouting::ReceiveKeysend {
+                       payment_data, payment_metadata, custom_tlvs, ..
+               } => {
+                       #[cfg(not(c_bindings))]
+                       assert_eq!(&custom_tlvs, recipient_onion.custom_tlvs());
+                       #[cfg(c_bindings)]
+                       assert_eq!(custom_tlvs, recipient_onion.custom_tlvs());
+                       assert!(payment_metadata.is_none());
+                       assert!(payment_data.is_none());
+               },
+               _ => panic!()
+       }
+}