Merge pull request #909 from TheBlueMatt/2021-04-0.0.14
[rust-lightning] / lightning / src / ln / functional_tests.rs
index 0e3e3f01eee84c0278017ed6f2b3efda261982a7..d67f9337cb2dbd2027d113ae95c7ee626ef7ba41 100644 (file)
@@ -18,8 +18,9 @@ use chain::channelmonitor;
 use chain::channelmonitor::{ChannelMonitor, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY};
 use chain::transaction::OutPoint;
 use chain::keysinterface::{KeysInterface, BaseSign};
+use ln::{PaymentPreimage, PaymentSecret, PaymentHash};
 use ln::channel::{COMMITMENT_TX_BASE_WEIGHT, COMMITMENT_TX_WEIGHT_PER_HTLC};
-use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentPreimage, PaymentHash, PaymentSendFailure, BREAKDOWN_TIMEOUT};
+use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentSendFailure, BREAKDOWN_TIMEOUT};
 use ln::channel::{Channel, ChannelError};
 use ln::{chan_utils, onion_utils};
 use routing::router::{Route, RouteHop, get_route};
@@ -128,7 +129,7 @@ fn test_async_inbound_update_fee() {
        let channel_id = chan.2;
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        // A                                        B
        // update_fee                            ->
@@ -243,7 +244,7 @@ fn test_update_fee_unordered_raa() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        // First nodes[0] generates an update_fee
        nodes[0].node.update_fee(channel_id, get_feerate!(nodes[0], channel_id) + 20).unwrap();
@@ -625,7 +626,7 @@ fn test_update_fee_with_fundee_update_add_htlc() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        let feerate = get_feerate!(nodes[0], channel_id);
        nodes[0].node.update_fee(channel_id, feerate+20).unwrap();
@@ -705,10 +706,10 @@ fn test_update_fee_with_fundee_update_add_htlc() {
                _ => panic!("Unexpected event"),
        };
 
-       claim_payment(&nodes[1], &vec!(&nodes[0])[..], our_payment_preimage, 800_000);
+       claim_payment(&nodes[1], &vec!(&nodes[0])[..], our_payment_preimage);
 
-       send_payment(&nodes[1], &vec!(&nodes[0])[..], 800000, 800_000);
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 800000, 800_000);
+       send_payment(&nodes[1], &vec!(&nodes[0])[..], 800000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 800000);
        close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true);
 }
 
@@ -874,7 +875,7 @@ fn updates_shutdown_wait() {
        unwrap_send_err!(nodes[0].node.send_payment(&route_1, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable {..}, {});
        unwrap_send_err!(nodes[1].node.send_payment(&route_2, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable {..}, {});
 
-       assert!(nodes[2].node.claim_funds(our_payment_preimage, &Some(payment_secret), 100_000));
+       assert!(nodes[2].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -1008,7 +1009,7 @@ fn do_test_shutdown_rebroadcast(recv_count: u8) {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
        let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
-       let (our_payment_preimage, _, our_payment_secret) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100000);
+       let (our_payment_preimage, _, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100000);
 
        nodes[1].node.close_channel(&chan_1.2).unwrap();
        let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
@@ -1047,7 +1048,7 @@ fn do_test_shutdown_rebroadcast(recv_count: u8) {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
-       assert!(nodes[2].node.claim_funds(our_payment_preimage, &Some(our_payment_secret), 100_000));
+       assert!(nodes[2].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -1175,15 +1176,15 @@ fn fake_network_test() {
        let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
 
        // Send some more payments
-       send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000, 1_000_000);
-       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000, 1_000_000);
+       send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
+       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
+       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
 
        // Test failure packets
        let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
@@ -1192,13 +1193,13 @@ fn fake_network_test() {
        // Add a new channel that skips 3
        let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
+       send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
 
        // Do some rebalance loop payments, simultaneously
        let mut hops = Vec::with_capacity(3);
@@ -1261,7 +1262,7 @@ fn fake_network_test() {
 
        // Claim the rebalances...
        fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
-       claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1, 1_000_000);
+       claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
 
        // Add a duplicate new channel from 2 to 4
        let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known());
@@ -1279,9 +1280,9 @@ fn fake_network_test() {
 
        //TODO: Test that routes work again here as we've been notified that the channel is full
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3, 3_000_000);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4, 3_000_000);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
 
        // Close down the channels...
        close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
@@ -1415,10 +1416,10 @@ fn holding_cell_htlc_counting() {
        }
 
        for (preimage, _) in payments.drain(..) {
-               claim_payment(&nodes[1], &[&nodes[2]], preimage, 100_000);
+               claim_payment(&nodes[1], &[&nodes[2]], preimage);
        }
 
-       send_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
 }
 
 #[test]
@@ -1445,16 +1446,16 @@ fn duplicate_htlc_test() {
        *nodes[0].network_payment_count.borrow_mut() -= 1;
        assert_eq!(route_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], 1000000).0, payment_preimage);
 
-       claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage);
        fail_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], payment_hash);
-       claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage, 1_000_000);
+       claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage);
 }
 
 #[test]
 fn test_duplicate_htlc_different_direction_onchain() {
        // Test that ChannelMonitor doesn't generate 2 preimage txn
        // when we have 2 HTLCs with same preimage that go across a node
-       // in opposite directions.
+       // in opposite directions, even with the same payment secret.
        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]);
@@ -1464,17 +1465,17 @@ fn test_duplicate_htlc_different_direction_onchain() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
-       let (payment_preimage, payment_hash, payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 900_000);
+       let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 900_000);
 
        let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
        let route = get_route(&nodes[1].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[0].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 800_000, TEST_FINAL_CLTV, &logger).unwrap();
-       let node_a_payment_secret = nodes[0].node.create_inbound_payment_for_hash(payment_hash, None, 7200).unwrap();
+       let node_a_payment_secret = nodes[0].node.create_inbound_payment_for_hash(payment_hash, None, 7200, 0).unwrap();
        send_along_route_with_secret(&nodes[1], route, &[&[&nodes[0]]], 800_000, payment_hash, node_a_payment_secret);
 
        // Provide preimage to node 0 by claiming payment
-       nodes[0].node.claim_funds(payment_preimage, &Some(payment_secret), 800_000);
+       nodes[0].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[0], 1);
 
        // Broadcast node 1 commitment txn
@@ -1560,7 +1561,7 @@ fn test_basic_channel_reserve() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put our balance under counterparty-announced channel reserve value".to_string(), 1);
 
-       send_payment(&nodes[0], &vec![&nodes[1]], max_can_send, max_can_send);
+       send_payment(&nodes[0], &vec![&nodes[1]], max_can_send);
 }
 
 #[test]
@@ -1763,7 +1764,7 @@ fn test_chan_reserve_dust_inbound_htlcs_outbound_chan() {
        // transaction fee with 0 HTLCs (183 sats)).
        create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 98817000, InitFeatures::known(), InitFeatures::known());
 
-       let dust_amt = 546000; // Dust amount
+       let dust_amt = 329000; // Dust amount
        // In the previous code, routing this dust payment would cause nodes[0] to perceive a channel
        // reserve violation even though it's a dust HTLC and therefore shouldn't count towards the
        // commitment transaction fee.
@@ -1939,7 +1940,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
                if stat01.value_to_self_msat < stat01.channel_reserve_msat + commit_tx_fee_all_htlcs + ensure_htlc_amounts_above_dust_buffer + amt_msat {
                        break;
                }
-               send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_0, recv_value_0);
+               send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_0);
 
                let (stat01_, stat11_, stat12_, stat22_) = (
                        get_channel_value_stat!(nodes[0], chan_1.2),
@@ -2070,29 +2071,31 @@ fn test_channel_reserve_holding_cell_htlcs() {
        let events = nodes[2].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 2);
        match events[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(our_payment_hash_21, *payment_hash);
-                       assert_eq!(Some(our_payment_secret_21), *payment_secret);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(our_payment_secret_21, *payment_secret);
                        assert_eq!(recv_value_21, amt);
                },
                _ => panic!("Unexpected event"),
        }
        match events[1] {
-               Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(our_payment_hash_22, *payment_hash);
-                       assert_eq!(Some(our_payment_secret_22), *payment_secret);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(our_payment_secret_22, *payment_secret);
                        assert_eq!(recv_value_22, amt);
                },
                _ => panic!("Unexpected event"),
        }
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_1, recv_value_1);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_21, recv_value_21);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_22, recv_value_22);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_1);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_21);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_22);
 
        let commit_tx_fee_0_htlcs = 2*commit_tx_fee_msat(feerate, 1);
        let recv_value_3 = commit_tx_fee_2_htlcs - commit_tx_fee_0_htlcs - total_fee_msat;
-       send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_3, recv_value_3);
+       send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_3);
 
        let commit_tx_fee_1_htlc = 2*commit_tx_fee_msat(feerate, 1 + 1);
        let expected_value_to_self = stat01.value_to_self_msat - (recv_value_1 + total_fee_msat) - (recv_value_21 + total_fee_msat) - (recv_value_22 + total_fee_msat) - (recv_value_3 + total_fee_msat);
@@ -2154,13 +2157,13 @@ fn channel_reserve_in_flight_removes() {
 
        // Now claim both of the first two HTLCs on B's end, putting B in AwaitingRAA and generating an
        // initial fulfill/CS.
-       assert!(nodes[1].node.claim_funds(payment_preimage_1, &None, b_chan_values.channel_reserve_msat - b_chan_values.value_to_self_msat - 10000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_1));
        check_added_monitors!(nodes[1], 1);
        let bs_removes = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 
        // This claim goes in B's holding cell, allowing us to have a pending B->A RAA which does not
        // remove the second HTLC when we send the HTLC back from B to A.
-       assert!(nodes[1].node.claim_funds(payment_preimage_2, &None, 20000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_2));
        check_added_monitors!(nodes[1], 1);
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
@@ -2253,8 +2256,8 @@ fn channel_reserve_in_flight_removes() {
        expect_pending_htlcs_forwardable!(nodes[0]);
        expect_payment_received!(nodes[0], payment_hash_4, payment_secret_4, 10000);
 
-       claim_payment(&nodes[1], &[&nodes[0]], payment_preimage_4, 10_000);
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_3, 100_000);
+       claim_payment(&nodes[1], &[&nodes[0]], payment_preimage_4);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_3);
 }
 
 #[test]
@@ -2280,10 +2283,10 @@ fn channel_monitor_network_test() {
        connect_blocks(&nodes[4], 4*CHAN_CONFIRM_DEPTH + 1 - nodes[4].best_block_info().1);
 
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
 
        // Simple case with no pending HTLCs:
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
@@ -2318,9 +2321,9 @@ fn channel_monitor_network_test() {
        assert_eq!(nodes[2].node.list_channels().len(), 1);
 
        macro_rules! claim_funds {
-               ($node: expr, $prev_node: expr, $preimage: expr, $amount: expr) => {
+               ($node: expr, $prev_node: expr, $preimage: expr) => {
                        {
-                               assert!($node.node.claim_funds($preimage, &None, $amount));
+                               assert!($node.node.claim_funds($preimage));
                                check_added_monitors!($node, 1);
 
                                let events = $node.node.get_and_clear_pending_msg_events();
@@ -2348,7 +2351,7 @@ fn channel_monitor_network_test() {
                node2_commitment_txid = node_txn[0].txid();
 
                // Claim the payment on nodes[3], giving it knowledge of the preimage
-               claim_funds!(nodes[3], nodes[2], payment_preimage_1, 3_000_000);
+               claim_funds!(nodes[3], nodes[2], payment_preimage_1);
                mine_transaction(&nodes[3], &node_txn[0]);
                check_added_monitors!(nodes[3], 1);
                check_preimage_claim(&nodes[3], &node_txn);
@@ -2397,7 +2400,7 @@ fn channel_monitor_network_test() {
                let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
 
                // Claim the payment on nodes[4], giving it knowledge of the preimage
-               claim_funds!(nodes[4], nodes[3], payment_preimage_2, 3_000_000);
+               claim_funds!(nodes[4], nodes[3], payment_preimage_2);
 
                connect_blocks(&nodes[4], TEST_FINAL_CLTV - CLTV_CLAIM_BUFFER + 2);
                let events = nodes[4].node.get_and_clear_pending_msg_events();
@@ -2462,7 +2465,7 @@ fn test_justice_tx() {
        assert_eq!(revoked_local_txn[1].input[0].previous_output.txid, revoked_local_txn[0].txid());
        assert_eq!(revoked_local_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT); // HTLC-Timeout
        // Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
 
        {
                mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -2508,7 +2511,7 @@ fn test_justice_tx() {
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_6.3.txid());
        assert_eq!(revoked_local_txn[0].output.len(), 2); // Only HTLC and output back to A are present
        // Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_4, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_4);
        {
                mine_transaction(&nodes[0], &revoked_local_txn[0]);
                {
@@ -2548,7 +2551,7 @@ fn revoked_output_claim() {
        // Only output is the full channel value back to nodes[0]:
        assert_eq!(revoked_local_txn[0].output.len(), 1);
        // Send a payment through, updating everyone's latest commitment txn
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 5000000, 5_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 5000000);
 
        // Inform nodes[1] that nodes[0] broadcast a stale tx
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -2578,7 +2581,7 @@ fn claim_htlc_outputs_shared_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        // node[0] is gonna to revoke an old state thus node[1] should be able to claim both offered/received HTLC outputs on top of commitment tx
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
        let (_payment_preimage_2, payment_hash_2, _) = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3000000);
@@ -2594,7 +2597,7 @@ fn claim_htlc_outputs_shared_tx() {
        check_spends!(revoked_local_txn[1], revoked_local_txn[0]);
 
        //Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1);
 
        {
                mine_transaction(&nodes[0], &revoked_local_txn[0]);
@@ -2647,7 +2650,7 @@ fn claim_htlc_outputs_single_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        // node[0] is gonna to revoke an old state thus node[1] should be able to claim both offered/received HTLC outputs on top of commitment tx, but this
        // time as two different claim transactions as we're gonna to timeout htlc with given a high current height
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
@@ -2657,7 +2660,7 @@ fn claim_htlc_outputs_single_tx() {
        let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan_1.2);
 
        //Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1);
 
        {
                confirm_transaction_at(&nodes[0], &revoked_local_txn[0], 100);
@@ -2733,8 +2736,8 @@ fn test_htlc_on_chain_success() {
        let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (our_payment_preimage, _payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
        let (our_payment_preimage_2, _payment_hash_2, _payment_secret_2) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
@@ -2744,8 +2747,8 @@ fn test_htlc_on_chain_success() {
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        assert_eq!(commitment_tx.len(), 1);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.claim_funds(our_payment_preimage, &None, 3_000_000);
-       nodes[2].node.claim_funds(our_payment_preimage_2, &None, 3_000_000);
+       nodes[2].node.claim_funds(our_payment_preimage);
+       nodes[2].node.claim_funds(our_payment_preimage_2);
        check_added_monitors!(nodes[2], 2);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -2914,15 +2917,15 @@ fn do_test_htlc_on_chain_timeout(connect_style: ConnectStyle) {
        let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment thorugh all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (_payment_preimage, payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
 
        // Broadcast legit commitment tx from C on B's chain
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.fail_htlc_backwards(&payment_hash, &None);
+       nodes[2].node.fail_htlc_backwards(&payment_hash);
        check_added_monitors!(nodes[2], 0);
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
@@ -3046,7 +3049,7 @@ fn test_simple_commitment_revoked_fail_backward() {
        // Get the will-be-revoked local txn from nodes[2]
        let revoked_local_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
        // Revoke the old state
-       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 
        let (_, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 3000000);
 
@@ -3112,7 +3115,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let revoked_local_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
        assert_eq!(revoked_local_txn[0].output.len(), if no_to_remote { 1 } else { 2 });
        // Revoke the old state
-       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage, if no_to_remote { 10_000 } else { 3_000_000});
+       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 
        let value = if use_dust {
                // The dust limit applied to HTLC outputs considers the fee of the HTLC transaction as
@@ -3124,7 +3127,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let (_, second_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], value);
        let (_, third_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], value);
 
-       assert!(nodes[2].node.fail_htlc_backwards(&first_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&first_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3137,7 +3140,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let bs_raa = commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false, true, false, true);
        // Drop the last RAA from 3 -> 2
 
-       assert!(nodes[2].node.fail_htlc_backwards(&second_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&second_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3154,7 +3157,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        nodes[2].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &as_raa);
        check_added_monitors!(nodes[2], 1);
 
-       assert!(nodes[2].node.fail_htlc_backwards(&third_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&third_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3510,7 +3513,7 @@ fn test_simple_peer_disconnect() {
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
        let payment_hash_2 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).1;
        fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_2);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_1, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_1);
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
@@ -3524,7 +3527,7 @@ fn test_simple_peer_disconnect() {
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
 
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], true, payment_preimage_3, 1_000_000);
+       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], true, payment_preimage_3);
        fail_payment_along_route(&nodes[0], &[&nodes[1], &nodes[2]], true, payment_hash_5);
 
        reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (1, 0), (1, 0), (false, false));
@@ -3546,7 +3549,7 @@ fn test_simple_peer_disconnect() {
                }
        }
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_4, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_4);
        fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_6);
 }
 
@@ -3646,15 +3649,16 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
        let events_2 = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events_2.len(), 1);
        match events_2[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(payment_hash_1, *payment_hash);
-                       assert_eq!(Some(payment_secret_1), *payment_secret);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(payment_secret_1, *payment_secret);
                        assert_eq!(amt, 1000000);
                },
                _ => panic!("Unexpected event"),
        }
 
-       nodes[1].node.claim_funds(payment_preimage_1, &None, 1_000_000);
+       nodes[1].node.claim_funds(payment_preimage_1);
        check_added_monitors!(nodes[1], 1);
 
        let events_3 = nodes[1].node.get_and_clear_pending_msg_events();
@@ -3749,7 +3753,7 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
                &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), Some(&nodes[0].node.list_usable_channels().iter().collect::<Vec<_>>()),
                &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        let payment_preimage_2 = send_along_route(&nodes[0], route, &[&nodes[1]], 1000000).0;
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2);
 }
 
 #[test]
@@ -3850,7 +3854,7 @@ fn test_funding_peer_disconnect() {
        let logger = test_utils::TestLogger::new();
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        let (payment_preimage, _, _) = send_along_route(&nodes[0], route, &[&nodes[1]], 1000000);
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
 }
 
 #[test]
@@ -3880,7 +3884,7 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
                _ => panic!("Unexpected event"),
        }
 
-       assert!(nodes[1].node.claim_funds(payment_preimage_1, &None, 1_000_000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_1));
        check_added_monitors!(nodes[1], 1);
 
        let events_2 = nodes[1].node.get_and_clear_pending_msg_events();
@@ -3983,9 +3987,10 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
        let events_5 = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events_5.len(), 1);
        match events_5[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_secret, amt: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt: _, user_payment_id: _ } => {
                        assert_eq!(payment_hash_2, *payment_hash);
-                       assert_eq!(Some(payment_secret_2), *payment_secret);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(payment_secret_2, *payment_secret);
                },
                _ => panic!("Unexpected event"),
        }
@@ -3994,7 +3999,7 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        check_added_monitors!(nodes[0], 1);
 
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2);
 }
 
 fn do_test_htlc_timeout(send_partial_mpp: bool) {
@@ -4293,7 +4298,7 @@ fn test_no_txn_manager_serialize_deserialize() {
                node.net_graph_msg_handler.handle_channel_update(&bs_update).unwrap();
        }
 
-       send_payment(&nodes[0], &[&nodes[1]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 1000000);
 }
 
 #[test]
@@ -4412,7 +4417,7 @@ fn test_manager_serialize_deserialize_events() {
                node.net_graph_msg_handler.handle_channel_update(&bs_update).unwrap();
        }
 
-       send_payment(&nodes[0], &[&nodes[1]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 1000000);
 }
 
 #[test]
@@ -4472,7 +4477,7 @@ fn test_simple_manager_serialize_deserialize() {
        reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        fail_payment(&nodes[0], &[&nodes[1]], our_payment_hash);
-       claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
 }
 
 #[test]
@@ -4586,7 +4591,7 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
        reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        reconnect_nodes(&nodes[0], &nodes[2], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        //... and we can even still claim the payment!
-       claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage, 1_000_000);
+       claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage);
 
        nodes[3].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
        let reestablish = get_event_msg!(nodes[3], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
@@ -4702,7 +4707,7 @@ fn test_claim_on_remote_revoked_sizeable_push_msat() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
@@ -4735,7 +4740,7 @@ fn test_static_spendable_outputs_preimage_tx() {
        assert_eq!(commitment_tx[0].input[0].previous_output.txid, chan_1.3.txid());
 
        // Settle A's commitment tx on B's chain
-       assert!(nodes[1].node.claim_funds(payment_preimage, &None, 3_000_000));
+       assert!(nodes[1].node.claim_funds(payment_preimage));
        check_added_monitors!(nodes[1], 1);
        mine_transaction(&nodes[1], &commitment_tx[0]);
        check_added_monitors!(nodes[1], 1);
@@ -4776,7 +4781,7 @@ fn test_static_spendable_outputs_timeout_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels ...
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        let (_, our_payment_hash, _) = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000);
 
@@ -4827,7 +4832,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_commitment_tx() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_1.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
        check_closed_broadcast!(nodes[1], true);
@@ -4862,7 +4867,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_timeout_tx() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_1.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // A will generate HTLC-Timeout from revoked commitment tx
        mine_transaction(&nodes[0], &revoked_local_txn[0]);
@@ -4931,7 +4936,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_success_tx() {
        // The to-be-revoked commitment tx should have one HTLC and one to_remote output
        assert_eq!(revoked_local_txn[0].output.len(), 2);
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // B will generate HTLC-Success from revoked commitment tx
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -5010,13 +5015,13 @@ fn test_onchain_to_onchain_claim() {
        let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels ...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (payment_preimage, _payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.claim_funds(payment_preimage, &None, 3_000_000);
+       nodes[2].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -5113,7 +5118,7 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
 
        let (our_payment_preimage, duplicate_payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 900000);
 
-       let payment_secret = nodes[3].node.create_inbound_payment_for_hash(duplicate_payment_hash, None, 7200).unwrap();
+       let payment_secret = nodes[3].node.create_inbound_payment_for_hash(duplicate_payment_hash, None, 7200, 0).unwrap();
        let route = get_route(&nodes[0].node.get_our_node_id(), &nodes[0].net_graph_msg_handler.network_graph.read().unwrap(),
                &nodes[3].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 900000, TEST_FINAL_CLTV, nodes[0].logger).unwrap();
        send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[2], &nodes[3]]], 900000, duplicate_payment_hash, payment_secret);
@@ -5144,7 +5149,7 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
                htlc_timeout_tx = node_txn[1].clone();
        }
 
-       nodes[2].node.claim_funds(our_payment_preimage, &None, 900_000);
+       nodes[2].node.claim_funds(our_payment_preimage);
        mine_transaction(&nodes[2], &commitment_txn[0]);
        check_added_monitors!(nodes[2], 2);
        let events = nodes[2].node.get_and_clear_pending_msg_events();
@@ -5235,7 +5240,7 @@ fn test_dynamic_spendable_outputs_local_htlc_success_tx() {
        check_spends!(local_txn[0], chan_1.3);
 
        // Give B knowledge of preimage to be able to generate a local HTLC-Success Tx
-       nodes[1].node.claim_funds(payment_preimage, &None, 9_000_000);
+       nodes[1].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[1], 1);
        mine_transaction(&nodes[1], &local_txn[0]);
        check_added_monitors!(nodes[1], 1);
@@ -5294,8 +5299,8 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        create_announced_chan_between_nodes(&nodes, 3, 5, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance and check output sanity...
-       send_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 500000, 500_000);
-       send_payment(&nodes[1], &[&nodes[2], &nodes[3], &nodes[5]], 500000, 500_000);
+       send_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 500000);
+       send_payment(&nodes[1], &[&nodes[2], &nodes[3], &nodes[5]], 500000);
        assert_eq!(get_local_commitment_txn!(nodes[3], chan.2)[0].output.len(), 2);
 
        let ds_dust_limit = nodes[3].node.channel_state.lock().unwrap().by_id.get(&chan.2).unwrap().holder_dust_limit_satoshis;
@@ -5307,30 +5312,30 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        let our_node_id = &nodes[1].node.get_our_node_id();
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), ds_dust_limit*1000, TEST_FINAL_CLTV, &logger).unwrap();
        // 2nd HTLC:
-       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_1, nodes[5].node.create_inbound_payment_for_hash(payment_hash_1, None, 7200).unwrap()); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_1, nodes[5].node.create_inbound_payment_for_hash(payment_hash_1, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
        // 3rd HTLC:
-       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_2, nodes[5].node.create_inbound_payment_for_hash(payment_hash_2, None, 7200).unwrap()); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_2, nodes[5].node.create_inbound_payment_for_hash(payment_hash_2, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
        // 4th HTLC:
        let (_, payment_hash_3, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        // 5th HTLC:
        let (_, payment_hash_4, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        // 6th HTLC:
-       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_3, nodes[5].node.create_inbound_payment_for_hash(payment_hash_3, None, 7200).unwrap());
+       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_3, nodes[5].node.create_inbound_payment_for_hash(payment_hash_3, None, 7200, 0).unwrap());
        // 7th HTLC:
-       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_4, nodes[5].node.create_inbound_payment_for_hash(payment_hash_4, None, 7200).unwrap());
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_4, nodes[5].node.create_inbound_payment_for_hash(payment_hash_4, None, 7200, 0).unwrap());
 
        // 8th HTLC:
        let (_, payment_hash_5, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        // 9th HTLC:
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), ds_dust_limit*1000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_5, nodes[5].node.create_inbound_payment_for_hash(payment_hash_5, None, 7200).unwrap()); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_5, nodes[5].node.create_inbound_payment_for_hash(payment_hash_5, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
 
        // 10th HTLC:
        let (_, payment_hash_6, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], ds_dust_limit*1000); // not added < dust limit + HTLC tx fee
        // 11th HTLC:
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_6, nodes[5].node.create_inbound_payment_for_hash(payment_hash_6, None, 7200).unwrap());
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_6, nodes[5].node.create_inbound_payment_for_hash(payment_hash_6, None, 7200, 0).unwrap());
 
        // Double-check that six of the new HTLC were added
        // We now have six HTLCs pending over the dust limit and six HTLCs under the dust limit (ie,
@@ -5340,10 +5345,10 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
 
        // Now fail back three of the over-dust-limit and three of the under-dust-limit payments in one go.
        // Fail 0th below-dust, 4th above-dust, 8th above-dust, 10th below-dust HTLCs
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_1, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_3, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_5, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_6, &None));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_1));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_3));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_5));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_6));
        check_added_monitors!(nodes[4], 0);
        expect_pending_htlcs_forwardable!(nodes[4]);
        check_added_monitors!(nodes[4], 1);
@@ -5356,8 +5361,8 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        commitment_signed_dance!(nodes[3], nodes[4], four_removes.commitment_signed, false);
 
        // Fail 3rd below-dust and 7th above-dust HTLCs
-       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_2, &None));
-       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_4, &None));
+       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_2));
+       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_4));
        check_added_monitors!(nodes[5], 0);
        expect_pending_htlcs_forwardable!(nodes[5]);
        check_added_monitors!(nodes[5], 1);
@@ -5641,7 +5646,7 @@ fn test_static_output_closing_tx() {
 
        let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        let closing_tx = close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true).2;
 
        mine_transaction(&nodes[0], &closing_tx);
@@ -5670,7 +5675,7 @@ fn do_htlc_claim_local_commitment_only(use_dust: bool) {
 
        // Claim the payment, but don't deliver A's commitment_signed, resulting in the HTLC only being
        // present in B's local commitment transaction, but none of A's commitment transactions.
-       assert!(nodes[1].node.claim_funds(our_payment_preimage, &None, if use_dust { 50_000 } else { 3_000_000 }));
+       assert!(nodes[1].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[1], 1);
 
        let bs_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
@@ -5749,7 +5754,7 @@ fn do_htlc_claim_previous_remote_commitment_only(use_dust: bool, check_revoke_no
        // actually revoked.
        let htlc_value = if use_dust { 50000 } else { 3000000 };
        let (_, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], htlc_value);
-       assert!(nodes[1].node.fail_htlc_backwards(&our_payment_hash, &None));
+       assert!(nodes[1].node.fail_htlc_backwards(&our_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[1]);
        check_added_monitors!(nodes[1], 1);
 
@@ -5883,6 +5888,31 @@ fn bolt2_open_channel_sending_node_checks_part2() {
        assert!(PublicKey::from_slice(&node0_to_1_send_open_channel.delayed_payment_basepoint.serialize()).is_ok());
 }
 
+#[test]
+fn bolt2_open_channel_sane_dust_limit() {
+       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);
+
+       let channel_value_satoshis=1000000;
+       let push_msat=10001;
+       nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), channel_value_satoshis, push_msat, 42, None).unwrap();
+       let mut node0_to_1_send_open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
+       node0_to_1_send_open_channel.dust_limit_satoshis = 661;
+       node0_to_1_send_open_channel.channel_reserve_satoshis = 100001;
+
+       nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &node0_to_1_send_open_channel);
+       let events = nodes[1].node.get_and_clear_pending_msg_events();
+       let err_msg = match events[0] {
+               MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
+                       msg.clone()
+               },
+               _ => panic!("Unexpected event"),
+       };
+       assert_eq!(err_msg.data, "dust_limit_satoshis (661) is greater than the implementation limit (660)");
+}
+
 // Test that if we fail to send an HTLC that is being freed from the holding cell, and the HTLC
 // originated from our node, its failure is surfaced to the user. We trigger this failure to
 // free the HTLC by increasing our fee while the HTLC is in the holding cell such that the HTLC
@@ -6063,7 +6093,7 @@ fn test_free_and_fail_holding_cell_htlcs() {
                Event::PaymentReceived { .. } => {},
                _ => panic!("Unexpected event"),
        }
-       nodes[1].node.claim_funds(payment_preimage_1, &None, amt_1);
+       nodes[1].node.claim_funds(payment_preimage_1);
        check_added_monitors!(nodes[1], 1);
        let update_msgs = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
        nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &update_msgs.update_fulfill_htlcs[0]);
@@ -6366,7 +6396,7 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_value_in_flight() {
        let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, channel_value, 0, InitFeatures::known(), InitFeatures::known());
        let max_in_flight = get_channel_value_stat!(nodes[0], chan.2).counterparty_max_htlc_value_in_flight_msat;
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], max_in_flight, max_in_flight);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], max_in_flight);
 
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        // Manually create a route over our max in flight (which our router normally automatically
@@ -6382,7 +6412,7 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_value_in_flight() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put us over the max HTLC value in flight our peer will accept".to_string(), 1);
 
-       send_payment(&nodes[0], &[&nodes[1]], max_in_flight, max_in_flight);
+       send_payment(&nodes[0], &[&nodes[1]], max_in_flight);
 }
 
 // BOLT 2 Requirements for the Receiver when handling an update_add_htlc message.
@@ -6706,7 +6736,7 @@ fn test_update_fulfill_htlc_bolt2_incorrect_htlc_id() {
 
        let our_payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 100000).0;
 
-       nodes[1].node.claim_funds(our_payment_preimage, &None, 100_000);
+       nodes[1].node.claim_funds(our_payment_preimage);
        check_added_monitors!(nodes[1], 1);
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -6747,7 +6777,7 @@ fn test_update_fulfill_htlc_bolt2_wrong_preimage() {
 
        let our_payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 100000).0;
 
-       nodes[1].node.claim_funds(our_payment_preimage, &None, 100_000);
+       nodes[1].node.claim_funds(our_payment_preimage);
        check_added_monitors!(nodes[1], 1);
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -6927,7 +6957,7 @@ fn do_test_failure_delay_dust_htlc_local_commitment(announce_latest: bool) {
        let as_prev_commitment_tx = get_local_commitment_txn!(nodes[0], chan.2);
 
        // Fail one HTLC to prune it in the will-be-latest-local commitment tx
-       assert!(nodes[1].node.fail_htlc_backwards(&payment_hash_2, &None));
+       assert!(nodes[1].node.fail_htlc_backwards(&payment_hash_2));
        check_added_monitors!(nodes[1], 0);
        expect_pending_htlcs_forwardable!(nodes[1]);
        check_added_monitors!(nodes[1], 1);
@@ -7017,7 +7047,7 @@ fn do_test_sweep_outbound_htlc_failure_update(revoked: bool, local: bool) {
        // We revoked bs_commitment_tx
        if revoked {
                let (payment_preimage_3, _, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
-               claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3, 1_000_000);
+               claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
        }
 
        let mut timeout_tx = Vec::new();
@@ -7390,8 +7420,8 @@ fn test_data_loss_protect() {
        let mut previous_chain_monitor_state = test_utils::TestVecWriter(Vec::new());
        nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut previous_chain_monitor_state).unwrap();
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
@@ -7483,16 +7513,30 @@ fn test_check_htlc_underpaying() {
        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);
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 
        // Create some initial channels
        create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
-       let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 10_000);
+       let route = get_route(&nodes[0].node.get_our_node_id(), &nodes[0].net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 10_000, TEST_FINAL_CLTV, nodes[0].logger).unwrap();
+       let (_, our_payment_hash, _) = get_payment_preimage_hash!(nodes[0]);
+       let our_payment_secret = nodes[1].node.create_inbound_payment_for_hash(our_payment_hash, Some(100_000), 7200, 0).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+       nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+       commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
+
+       // Note that we first have to wait a random delay before processing the receipt of the HTLC,
+       // and then will wait a second random delay before failing the HTLC back:
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       expect_pending_htlcs_forwardable!(nodes[1]);
 
-       // Node 3 is expecting payment of 100_000 but receive 10_000,
-       // fail htlc like we didn't know the preimage.
-       nodes[1].node.claim_funds(payment_preimage, &None, 100_000);
+       // Node 3 is expecting payment of 100_000 but received 10_000,
+       // it should fail htlc like we didn't know the preimage.
        nodes[1].node.process_pending_htlc_forwards();
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -7516,8 +7560,7 @@ fn test_check_htlc_underpaying() {
        // 10_000 msat as u64, followed by a height of CHAN_CONFIRM_DEPTH as u32
        let mut expected_failure_data = byte_utils::be64_to_array(10_000).to_vec();
        expected_failure_data.extend_from_slice(&byte_utils::be32_to_array(CHAN_CONFIRM_DEPTH));
-       expect_payment_failed!(nodes[0], payment_hash, true, 0x4000|15, &expected_failure_data[..]);
-       nodes[1].node.get_and_clear_pending_events();
+       expect_payment_failed!(nodes[0], our_payment_hash, true, 0x4000|15, &expected_failure_data[..]);
 }
 
 #[test]
@@ -7618,7 +7661,7 @@ fn test_bump_penalty_txn_on_revoked_commitment() {
        let header_114 = connect_blocks(&nodes[1], 14);
 
        // Actually revoke tx by claiming a HTLC
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
        let header = BlockHeader { version: 0x20000000, prev_blockhash: header_114, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        connect_block(&nodes[1], &Block { header, txdata: vec![revoked_txn[0].clone()] });
        check_added_monitors!(nodes[1], 1);
@@ -7709,7 +7752,7 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Revoke local commitment tx
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        // B will generate both revoked HTLC-timeout/HTLC-preimage txn from revoked commitment tx
@@ -7875,7 +7918,7 @@ fn test_bump_penalty_txn_on_remote_commitment() {
        assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Claim a HTLC without revocation (provide B monitor with preimage)
-       nodes[1].node.claim_funds(payment_preimage, &None, 3_000_000);
+       nodes[1].node.claim_funds(payment_preimage);
        mine_transaction(&nodes[1], &remote_txn[0]);
        check_added_monitors!(nodes[1], 2);
 
@@ -8012,7 +8055,7 @@ fn test_bump_txn_sanitize_tracking_maps() {
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Revoke local commitment tx
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 9_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // Broadcast set of revoked txn on A
        connect_blocks(&nodes[0], 52 - CHAN_CONFIRM_DEPTH);
@@ -8107,7 +8150,175 @@ fn test_simple_mpp() {
        route.paths[1][0].short_channel_id = chan_2_id;
        route.paths[1][1].short_channel_id = chan_4_id;
        send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], 200_000, payment_hash, payment_secret);
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage, 200_000);
+       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
+}
+
+#[test]
+fn test_preimage_storage() {
+       // Simple test of payment preimage storage allowing no client-side storage to claim payments
+       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, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       {
+               let (payment_hash, payment_secret) = nodes[1].node.create_inbound_payment(Some(100_000), 7200, 42);
+
+               let logger = test_utils::TestLogger::new();
+               let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+               let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
+               check_added_monitors!(nodes[0], 1);
+               let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+               let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+               nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+               commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
+       }
+       // Note that after leaving the above scope we have no knowledge of any arguments or return
+       // values from previous calls.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       let events = nodes[1].node.get_and_clear_pending_events();
+       assert_eq!(events.len(), 1);
+       match events[0] {
+               Event::PaymentReceived { payment_preimage, user_payment_id, .. } => {
+                       assert_eq!(user_payment_id, 42);
+                       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage.unwrap());
+               },
+               _ => panic!("Unexpected event"),
+       }
+}
+
+#[test]
+fn test_secret_timeout() {
+       // Simple test of payment secret storage time outs
+       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, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       let (payment_hash, payment_secret_1) = nodes[1].node.create_inbound_payment(Some(100_000), 2, 0);
+
+       // We should fail to register the same payment hash twice, at least until we've connected a
+       // block with time 7200 + CHAN_CONFIRM_DEPTH + 1.
+       if let Err(APIError::APIMisuseError { err }) = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 0) {
+               assert_eq!(err, "Duplicate payment hash");
+       } else { panic!(); }
+       let mut block = Block {
+               header: BlockHeader {
+                       version: 0x2000000,
+                       prev_blockhash: nodes[1].blocks.borrow().last().unwrap().0.block_hash(),
+                       merkle_root: Default::default(),
+                       time: nodes[1].blocks.borrow().len() as u32 + 7200, bits: 42, nonce: 42 },
+               txdata: vec![],
+       };
+       connect_block(&nodes[1], &block);
+       if let Err(APIError::APIMisuseError { err }) = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 0) {
+               assert_eq!(err, "Duplicate payment hash");
+       } else { panic!(); }
+
+       // If we then connect the second block, we should be able to register the same payment hash
+       // again with a different user_payment_id (this time getting a new payment secret).
+       block.header.prev_blockhash = block.header.block_hash();
+       block.header.time += 1;
+       connect_block(&nodes[1], &block);
+       let our_payment_secret = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 42).unwrap();
+       assert_ne!(payment_secret_1, our_payment_secret);
+
+       {
+               let logger = test_utils::TestLogger::new();
+               let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+               let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash, &Some(our_payment_secret)).unwrap();
+               check_added_monitors!(nodes[0], 1);
+               let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+               let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+               nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+               commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
+       }
+       // Note that after leaving the above scope we have no knowledge of any arguments or return
+       // values from previous calls.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       let events = nodes[1].node.get_and_clear_pending_events();
+       assert_eq!(events.len(), 1);
+       match events[0] {
+               Event::PaymentReceived { payment_preimage, payment_secret, user_payment_id, .. } => {
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(user_payment_id, 42);
+                       assert_eq!(payment_secret, our_payment_secret);
+                       // We don't actually have the payment preimage with which to claim this payment!
+               },
+               _ => panic!("Unexpected event"),
+       }
+}
+
+#[test]
+fn test_bad_secret_hash() {
+       // Simple test of unregistered payment hash/invalid payment secret handling
+       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, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       let random_payment_hash = PaymentHash([42; 32]);
+       let random_payment_secret = PaymentSecret([43; 32]);
+       let (our_payment_hash, our_payment_secret) = nodes[1].node.create_inbound_payment(Some(100_000), 2, 0);
+
+       let logger = test_utils::TestLogger::new();
+       let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+       let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+
+       // All the below cases should end up being handled exactly identically, so we macro the
+       // resulting events.
+       macro_rules! handle_unknown_invalid_payment_data {
+               () => {
+                       check_added_monitors!(nodes[0], 1);
+                       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+                       let payment_event = SendEvent::from_event(events.pop().unwrap());
+                       nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+                       commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
+
+                       // We have to forward pending HTLCs once to process the receipt of the HTLC and then
+                       // again to process the pending backwards-failure of the HTLC
+                       expect_pending_htlcs_forwardable!(nodes[1]);
+                       expect_pending_htlcs_forwardable!(nodes[1]);
+                       check_added_monitors!(nodes[1], 1);
+
+                       // We should fail the payment back
+                       let mut events = nodes[1].node.get_and_clear_pending_msg_events();
+                       match events.pop().unwrap() {
+                               MessageSendEvent::UpdateHTLCs { node_id: _, updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. } } => {
+                                       nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
+                                       commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false);
+                               },
+                               _ => panic!("Unexpected event"),
+                       }
+               }
+       }
+
+       let expected_error_code = 0x4000|15; // incorrect_or_unknown_payment_details
+       // Error data is the HTLC value (100,000) and current block height
+       let expected_error_data = [0, 0, 0, 0, 0, 1, 0x86, 0xa0, 0, 0, 0, CHAN_CONFIRM_DEPTH as u8];
+
+       // Send a payment with the right payment hash but the wrong payment secret
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(random_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], our_payment_hash, true, expected_error_code, expected_error_data);
+
+       // Send a payment with a random payment hash, but the right payment secret
+       nodes[0].node.send_payment(&route, random_payment_hash, &Some(our_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], random_payment_hash, true, expected_error_code, expected_error_data);
+
+       // Send a payment with a random payment hash and random payment secret
+       nodes[0].node.send_payment(&route, random_payment_hash, &Some(random_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], random_payment_hash, true, expected_error_code, expected_error_data);
 }
 
 #[test]
@@ -8130,7 +8341,7 @@ fn test_update_err_monitor_lockdown() {
        let outpoint = OutPoint { txid: chan_1.3.txid(), index: 0 };
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000, 10_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000);
 
        // Route a HTLC from node 0 to node 1 (but don't settle)
        let preimage = route_payment(&nodes[0], &vec!(&nodes[1])[..], 9_000_000).0;
@@ -8155,7 +8366,7 @@ fn test_update_err_monitor_lockdown() {
        watchtower.chain_monitor.block_connected(&Block { header, txdata: vec![] }, 200);
 
        // Try to update ChannelMonitor
-       assert!(nodes[1].node.claim_funds(preimage, &None, 9_000_000));
+       assert!(nodes[1].node.claim_funds(preimage));
        check_added_monitors!(nodes[1], 1);
        let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
        assert_eq!(updates.update_fulfill_htlcs.len(), 1);
@@ -8189,7 +8400,7 @@ fn test_concurrent_monitor_claim() {
        let outpoint = OutPoint { txid: chan_1.3.txid(), index: 0 };
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000, 10_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000);
 
        // Route a HTLC from node 0 to node 1 (but don't settle)
        route_payment(&nodes[0], &vec!(&nodes[1])[..], 9_000_000).0;
@@ -8342,7 +8553,7 @@ fn test_htlc_no_detection() {
        // Create some initial channels
        let chan_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 1_000_000, 1_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 1_000_000);
        let (_, our_payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 2_000_000);
        let local_txn = get_local_commitment_txn!(nodes[0], chan_1.2);
        assert_eq!(local_txn[0].input.len(), 1);
@@ -8434,7 +8645,7 @@ fn do_test_onchain_htlc_settlement_after_close(broadcast_alice: bool, go_onchain
        // Step (5):
        // Carol then claims the funds and sends an update_fulfill message to Bob, and they go through the
        // process of removing the HTLC from their commitment transactions.
-       assert!(nodes[2].node.claim_funds(payment_preimage, &None, 3_000_000));
+       assert!(nodes[2].node.claim_funds(payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let carol_updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(carol_updates.update_add_htlcs.is_empty());
@@ -8688,7 +8899,7 @@ fn test_duplicate_chan_id() {
        let (funding_locked, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
        let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &funding_locked);
        update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &as_update, &bs_update);
-       send_payment(&nodes[0], &[&nodes[1]], 8000000, 8_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 8000000);
 }
 
 #[test]