X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Foutbound_payment.rs;h=2522f99fbe85dbecd751034215207cbda23ad5ab;hb=f267a30cc7fe564d8f767c9c973e211f5bf64a82;hp=4cc8d85ad19e29d77525c741bd1b59175f4ca7e8;hpb=8c99e34b9321db8ba22eb6b1836b436bbb652271;p=rust-lightning

diff --git a/lightning/src/ln/outbound_payment.rs b/lightning/src/ln/outbound_payment.rs
index 4cc8d85a..2522f99f 100644
--- a/lightning/src/ln/outbound_payment.rs
+++ b/lightning/src/ln/outbound_payment.rs
@@ -1354,12 +1354,14 @@ impl OutboundPayments {
 		}
 		let mut has_ok = false;
 		let mut has_err = false;
-		let mut pending_amt_unsent = 0;
+		let mut has_unsent = false;
 		let mut total_ok_fees_msat = 0;
+		let mut total_ok_amt_sent_msat = 0;
 		for (res, path) in results.iter().zip(route.paths.iter()) {
 			if res.is_ok() {
 				has_ok = true;
 				total_ok_fees_msat += path.fee_msat();
+				total_ok_amt_sent_msat += path.final_value_msat();
 			}
 			if res.is_err() { has_err = true; }
 			if let &Err(APIError::MonitorUpdateInProgress) = res {
@@ -1368,23 +1370,27 @@ impl OutboundPayments {
 				has_err = true;
 				has_ok = true;
 				total_ok_fees_msat += path.fee_msat();
+				total_ok_amt_sent_msat += path.final_value_msat();
 			} else if res.is_err() {
-				pending_amt_unsent += path.final_value_msat();
+				has_unsent = true;
 			}
 		}
 		if has_err && has_ok {
 			Err(PaymentSendFailure::PartialFailure {
 				results,
 				payment_id,
-				failed_paths_retry: if pending_amt_unsent != 0 {
+				failed_paths_retry: if has_unsent {
 					if let Some(route_params) = &route.route_params {
 						let mut route_params = route_params.clone();
 						// We calculate the leftover fee budget we're allowed to spend by
 						// subtracting the used fee from the total fee budget.
 						route_params.max_total_routing_fee_msat = route_params
 							.max_total_routing_fee_msat.map(|m| m.saturating_sub(total_ok_fees_msat));
-						route_params.final_value_msat = pending_amt_unsent;
 
+						// We calculate the remaining target amount by subtracting the succeded
+						// path values.
+						route_params.final_value_msat = route_params.final_value_msat
+							.saturating_sub(total_ok_amt_sent_msat);
 						Some(route_params)
 					} else { None }
 				} else { None },