+#[test]
+fn test_htlc_timeout() {
+ // If the user fails to claim/fail an HTLC within the HTLC CLTV timeout we fail it for them
+ // to avoid our counterparty failing the channel.
+ 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::supported(), InitFeatures::supported());
+ let (_, our_payment_hash) = route_payment(&nodes[0], &[&nodes[1]], 100000);
+
+ let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+ nodes[0].block_notifier.block_connected_checked(&header, 101, &[], &[]);
+ nodes[1].block_notifier.block_connected_checked(&header, 101, &[], &[]);
+ for i in 102..TEST_FINAL_CLTV + 100 + 1 - CLTV_CLAIM_BUFFER - LATENCY_GRACE_PERIOD_BLOCKS {
+ header.prev_blockhash = header.bitcoin_hash();
+ nodes[0].block_notifier.block_connected_checked(&header, i, &[], &[]);
+ nodes[1].block_notifier.block_connected_checked(&header, i, &[], &[]);
+ }
+
+ expect_pending_htlcs_forwardable!(nodes[1]);
+
+ check_added_monitors!(nodes[1], 1);
+ let htlc_timeout_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+ assert!(htlc_timeout_updates.update_add_htlcs.is_empty());
+ assert_eq!(htlc_timeout_updates.update_fail_htlcs.len(), 1);
+ assert!(htlc_timeout_updates.update_fail_malformed_htlcs.is_empty());
+ assert!(htlc_timeout_updates.update_fee.is_none());
+
+ nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_timeout_updates.update_fail_htlcs[0]);
+ commitment_signed_dance!(nodes[0], nodes[1], htlc_timeout_updates.commitment_signed, false);
+ // 100_000 msat as u64, followed by a height of 123 as u32
+ let mut expected_failure_data = byte_utils::be64_to_array(100_000).to_vec();
+ expected_failure_data.extend_from_slice(&byte_utils::be32_to_array(123));
+ expect_payment_failed!(nodes[0], our_payment_hash, true, 0x4000 | 15, &expected_failure_data[..]);
+}
+