/// [`Event::PaymentPathFailed`] for retrying a failed payment path.
///
/// [`Event::PaymentPathFailed`]: crate::util::events::Event::PaymentPathFailed
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq, Eq)]
pub struct RouteParameters {
/// The parameters of the failed payment path.
pub payment_params: PaymentParameters,
}
}
+#[inline(always)]
+/// Calculate the fees required to route the given amount over a channel with the given fees.
fn compute_fees(amount_msat: u64, channel_fees: RoutingFees) -> Option<u64> {
- let proportional_fee_millions =
- amount_msat.checked_mul(channel_fees.proportional_millionths as u64);
- if let Some(new_fee) = proportional_fee_millions.and_then(|part| {
- (channel_fees.base_msat as u64).checked_add(part / 1_000_000) }) {
+ amount_msat.checked_mul(channel_fees.proportional_millionths as u64)
+ .and_then(|part| (channel_fees.base_msat as u64).checked_add(part / 1_000_000))
+}
- Some(new_fee)
- } else {
- // This function may be (indirectly) called without any verification,
- // with channel_fees provided by a caller. We should handle it gracefully.
- None
- }
+#[inline(always)]
+/// Calculate the fees required to route the given amount over a channel with the given fees,
+/// saturating to [`u64::max_value`].
+fn compute_fees_saturating(amount_msat: u64, channel_fees: RoutingFees) -> u64 {
+ amount_msat.checked_mul(channel_fees.proportional_millionths as u64)
+ .map(|prop| prop / 1_000_000).unwrap_or(u64::max_value())
+ .saturating_add(channel_fees.base_msat as u64)
}
/// The default `features` we assume for a node in a route, when no `features` are known about that
// might violate htlc_minimum_msat on the hops which are next along the
// payment path (upstream to the payee). To avoid that, we recompute
// path fees knowing the final path contribution after constructing it.
- let path_htlc_minimum_msat = compute_fees($next_hops_path_htlc_minimum_msat, $candidate.fees())
- .and_then(|fee_msat| fee_msat.checked_add($next_hops_path_htlc_minimum_msat))
- .map(|fee_msat| cmp::max(fee_msat, $candidate.htlc_minimum_msat()))
- .unwrap_or_else(|| u64::max_value());
+ let path_htlc_minimum_msat = cmp::max(
+ compute_fees_saturating($next_hops_path_htlc_minimum_msat, $candidate.fees())
+ .saturating_add($next_hops_path_htlc_minimum_msat),
+ $candidate.htlc_minimum_msat());
let hm_entry = dist.entry($src_node_id);
let old_entry = hm_entry.or_insert_with(|| {
// If there was previously no known way to access the source node
if should_process {
let mut hop_use_fee_msat = 0;
- let mut total_fee_msat = $next_hops_fee_msat;
+ let mut total_fee_msat: u64 = $next_hops_fee_msat;
// Ignore hop_use_fee_msat for channel-from-us as we assume all channels-from-us
// will have the same effective-fee
if $src_node_id != our_node_id {
- match compute_fees(amount_to_transfer_over_msat, $candidate.fees()) {
- // max_value means we'll always fail
- // the old_entry.total_fee_msat > total_fee_msat check
- None => total_fee_msat = u64::max_value(),
- Some(fee_msat) => {
- hop_use_fee_msat = fee_msat;
- total_fee_msat += hop_use_fee_msat;
- }
- }
+ // Note that `u64::max_value` means we'll always fail the
+ // `old_entry.total_fee_msat > total_fee_msat` check below
+ hop_use_fee_msat = compute_fees_saturating(amount_to_transfer_over_msat, $candidate.fees());
+ total_fee_msat = total_fee_msat.saturating_add(hop_use_fee_msat);
}
let channel_usage = ChannelUsage {
'load_endpoints: for _ in 0..10 {
loop {
seed = seed.overflowing_mul(0xdeadbeef).0;
- let src = &PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let src = &PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
seed = seed.overflowing_mul(0xdeadbeef).0;
- let dst = PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
let payment_params = PaymentParameters::from_node_id(dst);
let amt = seed as u64 % 200_000_000;
let params = ProbabilisticScoringParameters::default();
'load_endpoints: for _ in 0..10 {
loop {
seed = seed.overflowing_mul(0xdeadbeef).0;
- let src = &PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let src = &PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
seed = seed.overflowing_mul(0xdeadbeef).0;
- let dst = PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
let payment_params = PaymentParameters::from_node_id(dst).with_features(channelmanager::provided_invoice_features(&config));
let amt = seed as u64 % 200_000_000;
let params = ProbabilisticScoringParameters::default();
'load_endpoints: for _ in 0..150 {
loop {
seed *= 0xdeadbeef;
- let src = PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let src = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
seed *= 0xdeadbeef;
- let dst = PublicKey::from_slice(nodes.keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
+ let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
let params = PaymentParameters::from_node_id(dst).with_features(features.clone());
let first_hop = first_hop(src);
let amt = seed as u64 % 1_000_000;