From 977ef01d5a0ed350077a07e8851f3304835437aa Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Thu, 26 Jan 2017 00:59:50 -0800
Subject: [PATCH] txdb: failsafe for unconfirm.

---
 lib/wallet/txdb.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/wallet/txdb.js b/lib/wallet/txdb.js
index c08b5b3c..15e8b156 100644
--- a/lib/wallet/txdb.js
+++ b/lib/wallet/txdb.js
@@ -1345,6 +1345,9 @@ TXDB.prototype._unconfirm = co(function* unconfirm(hash) {
   if (!wtx)
     return;
 
+  if (wtx.height === -1)
+    return;
+
   return yield this.disconnect(wtx, wtx.getBlock());
 });