From 84a732e636c28c6ed274b91b8fcd9d2f53bd9ba6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E4=BC=9F=E6=B0=91?= <wang0.618@qq.com>
Date: Fri, 5 Apr 2019 20:53:12 +0800
Subject: [PATCH] fix Transaction.Verify bug

---
 transaction.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/transaction.go b/transaction.go
index 107f0154..79ab07e2 100644
--- a/transaction.go
+++ b/transaction.go
@@ -145,8 +145,15 @@ func (tx *Transaction) Verify(prevTXs map[string]Transaction) bool {
 
 	for inID, vin := range tx.Vin {
 		prevTx := prevTXs[hex.EncodeToString(vin.Txid)]
+		refVoutPubKeyHash := prevTx.Vout[vin.Vout].PubKeyHash
+
+		// check that the spend coin is owned by vin.PubKey
+		if !bytes.Equal(HashPubKey(vin.PubKey), refVoutPubKeyHash) {
+			return false
+		}
+
 		txCopy.Vin[inID].Signature = nil
-		txCopy.Vin[inID].PubKey = prevTx.Vout[vin.Vout].PubKeyHash
+		txCopy.Vin[inID].PubKey = refVoutPubKeyHash
 
 		r := big.Int{}
 		s := big.Int{}