From 805641adf5e771e4f29375da547bdd988ccf8c24 Mon Sep 17 00:00:00 2001
From: Joost Jager <joost.jager@gmail.com>
Date: Thu, 16 Apr 2020 15:08:07 +0200
Subject: [PATCH] routing: do not split payment if destination does not support
 mpp

---
 routing/payment_session.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/routing/payment_session.go b/routing/payment_session.go
index 6c4677686..f5a49eff0 100644
--- a/routing/payment_session.go
+++ b/routing/payment_session.go
@@ -243,6 +243,15 @@ func (p *paymentSession) RequestRoute(maxAmt, feeLimit lnwire.MilliSatoshi,
 
 		switch {
 		case err == errNoPathFound:
+			// Don't split if this is a legacy payment without mpp
+			// record.
+			if p.payment.PaymentAddr == nil {
+				p.log.Debugf("not splitting because payment " +
+					"address is unspecified")
+
+				return nil, errNoPathFound
+			}
+
 			// No splitting if this is the last shard.
 			isLastShard := activeShards+1 >= p.payment.MaxShards
 			if isLastShard {