From 3aa5e650fb3b2b71c20d27c88bcfbb1393b9d830 Mon Sep 17 00:00:00 2001
From: "Johan T. Halseth" <johanth@gmail.com>
Date: Tue, 20 Apr 2021 08:50:55 +0200
Subject: [PATCH] lntest/mock: set input index on spend event

---
 lntest/mock/spendnotifier.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lntest/mock/spendnotifier.go b/lntest/mock/spendnotifier.go
index 7d51b458..ced93f25 100644
--- a/lntest/mock/spendnotifier.go
+++ b/lntest/mock/spendnotifier.go
@@ -67,13 +67,20 @@ func (s *SpendNotifier) Spend(outpoint *wire.OutPoint, height int32,
 	s.mtx.Lock()
 	defer s.mtx.Unlock()
 
+	var inputIndex uint32
+	for i, in := range txn.TxIn {
+		if in.PreviousOutPoint == *outpoint {
+			inputIndex = uint32(i)
+		}
+	}
+
 	txnHash := txn.TxHash()
 	details := &chainntnfs.SpendDetail{
 		SpentOutPoint:     outpoint,
 		SpendingHeight:    height,
 		SpendingTx:        txn,
 		SpenderTxHash:     &txnHash,
-		SpenderInputIndex: outpoint.Index,
+		SpenderInputIndex: inputIndex,
 	}
 
 	// Cache details in case of late registration.