}
}
+/// Returns the total fee earned by this HTLC forward, in msat.
pub fn expect_payment_forwarded<CM: AChannelManager, H: NodeHolder<CM=CM>>(
event: Event, node: &H, prev_node: &H, next_node: &H, expected_fee: Option<u64>,
expected_extra_fees_msat: Option<u64>, upstream_force_closed: bool,
- downstream_force_closed: bool
-) {
+ downstream_force_closed: bool, allow_1_msat_fee_overpay: bool,
+) -> Option<u64> {
match event {
Event::PaymentForwarded {
- total_fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id,
- outbound_amount_forwarded_msat: _, skimmed_fee_msat
+ prev_channel_id, next_channel_id, prev_user_channel_id, next_user_channel_id,
+ total_fee_earned_msat, skimmed_fee_msat, claim_from_onchain_tx, ..
} => {
- assert_eq!(total_fee_earned_msat, expected_fee);
+ if allow_1_msat_fee_overpay {
+ // Aggregating fees for blinded paths may result in a rounding error, causing slight
+ // overpayment in fees.
+ let actual_fee = total_fee_earned_msat.unwrap();
+ let expected_fee = expected_fee.unwrap();
+ assert!(actual_fee == expected_fee || actual_fee == expected_fee + 1);
+ } else {
+ assert_eq!(total_fee_earned_msat, expected_fee);
+ }
// Check that the (knowingly) withheld amount is always less or equal to the expected
// overpaid amount.
assert!(skimmed_fee_msat == expected_extra_fees_msat);
if !upstream_force_closed {
// Is the event prev_channel_id in one of the channels between the two nodes?
- assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == prev_node.node().get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
+ assert!(node.node().list_channels().iter().any(|x|
+ x.counterparty.node_id == prev_node.node().get_our_node_id() &&
+ x.channel_id == prev_channel_id.unwrap() &&
+ x.user_channel_id == prev_user_channel_id.unwrap()
+ ));
}
// We check for force closures since a force closed channel is removed from the
// node's channel list
if !downstream_force_closed {
- assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == next_node.node().get_our_node_id() && x.channel_id == next_channel_id.unwrap()));
+ // As documented, `next_user_channel_id` will only be `Some` if we didn't settle via an
+ // onchain transaction, just as the `total_fee_earned_msat` field. Rather than
+ // introducing yet another variable, we use the latter's state as a flag to detect
+ // this and only check if it's `Some`.
+ if total_fee_earned_msat.is_none() {
+ assert!(node.node().list_channels().iter().any(|x|
+ x.counterparty.node_id == next_node.node().get_our_node_id() &&
+ x.channel_id == next_channel_id.unwrap()
+ ));
+ } else {
+ assert!(node.node().list_channels().iter().any(|x|
+ x.counterparty.node_id == next_node.node().get_our_node_id() &&
+ x.channel_id == next_channel_id.unwrap() &&
+ x.user_channel_id == next_user_channel_id.unwrap()
+ ));
+ }
}
assert_eq!(claim_from_onchain_tx, downstream_force_closed);
+ total_fee_earned_msat
},
_ => panic!("Unexpected event"),
}
assert_eq!(events.len(), 1);
$crate::ln::functional_test_utils::expect_payment_forwarded(
events.pop().unwrap(), &$node, &$prev_node, &$next_node, $expected_fee, None,
- $upstream_force_closed, $downstream_force_closed
+ $upstream_force_closed, $downstream_force_closed, false
);
}
}
pub expected_min_htlc_overpay: Vec<u32>,
pub skip_last: bool,
pub payment_preimage: PaymentPreimage,
+ // Allow forwarding nodes to have taken 1 msat more fee than expected based on the downstream
+ // fulfill amount.
+ //
+ // Necessary because our test utils calculate the expected fee for an intermediate node based on
+ // the amount was claimed in their downstream peer's fulfill, but blinded intermediate nodes
+ // calculate their fee based on the inbound amount from their upstream peer, causing a difference
+ // in rounding.
+ pub allow_1_msat_fee_overpay: bool,
}
impl<'a, 'b, 'c, 'd> ClaimAlongRouteArgs<'a, 'b, 'c, 'd> {
Self {
origin_node, expected_paths, expected_extra_fees: vec![0; expected_paths.len()],
expected_min_htlc_overpay: vec![0; expected_paths.len()], skip_last: false, payment_preimage,
+ allow_1_msat_fee_overpay: false,
}
}
pub fn skip_last(mut self, skip_last: bool) -> Self {
self.expected_min_htlc_overpay = extra_fees;
self
}
+ pub fn allow_1_msat_fee_overpay(mut self) -> Self {
+ self.allow_1_msat_fee_overpay = true;
+ self
+ }
}
pub fn pass_claimed_payment_along_route<'a, 'b, 'c, 'd>(args: ClaimAlongRouteArgs) -> u64 {
let ClaimAlongRouteArgs {
origin_node, expected_paths, expected_extra_fees, expected_min_htlc_overpay, skip_last,
- payment_preimage: our_payment_preimage
+ payment_preimage: our_payment_preimage, allow_1_msat_fee_overpay,
} = args;
let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
assert_eq!(claim_event.len(), 1);
}
let mut events = $node.node.get_and_clear_pending_events();
assert_eq!(events.len(), 1);
- expect_payment_forwarded(events.pop().unwrap(), *$node, $next_node, $prev_node,
- Some(fee as u64), expected_extra_fee, false, false);
- expected_total_fee_msat += fee as u64;
- fwd_amt_msat += fee as u64;
+ let actual_fee = expect_payment_forwarded(events.pop().unwrap(), *$node, $next_node, $prev_node,
+ Some(fee as u64), expected_extra_fee, false, false, allow_1_msat_fee_overpay);
+ expected_total_fee_msat += actual_fee.unwrap();
+ fwd_amt_msat += actual_fee.unwrap();
check_added_monitors!($node, 1);
let new_next_msgs = if $new_msgs {
let events = $node.node.get_and_clear_pending_msg_events();
projects / rust-lightning / blobdiff