From 1096cd0bd94f0c812103ebb351df6e61590db9ce Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sat, 17 Sep 2016 18:25:45 -0700
Subject: [PATCH] peer: fix checksum optimization for spv serving.

---
 lib/net/peer.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/net/peer.js b/lib/net/peer.js
index 795ec471..1b6a4254 100644
--- a/lib/net/peer.js
+++ b/lib/net/peer.js
@@ -746,14 +746,18 @@ Peer.prototype.write = function write(data) {
  */
 
 Peer.prototype.send = function send(packet) {
-  var checksum;
+  var tx, checksum;
 
   // Used cached hashes as the
   // packet checksum for speed.
   if (packet.type === packetTypes.TX) {
-    checksum = packet.witness
-      ? packet.tx.witnessHash()
-      : packet.tx.hash();
+    tx = packet.tx;
+    if (packet.witness) {
+      if (!tx.isCoinbase())
+        checksum = tx.witnessHash()
+    } else {
+      checksum = tx.hash();
+    }
   }
 
   this.write(this.framer.packet(packet.cmd, packet.toRaw(), checksum));