- if let PendingOutboundPayment::Retryable { ref mut pending_amt_msat, .. } = self {
- *pending_amt_msat -= part_amt_msat.expect("We must only not provide an amount if the payment was already fulfilled");
+ if let PendingOutboundPayment::Retryable { ref mut pending_amt_msat, ref mut pending_fee_msat, .. } = self {
+ let path = path.expect("Fulfilling a payment should always come with a path");
+ let path_last_hop = path.last().expect("Outbound payments must have had a valid path");
+ *pending_amt_msat -= path_last_hop.fee_msat;
+ if let Some(fee_msat) = pending_fee_msat.as_mut() {
+ *fee_msat -= path.get_path_fees();
+ }