From 82bdd73f05c46bdcabbce2c4303f2fbb5e6c516d Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 3 Jul 2017 17:39:06 -0700
Subject: [PATCH] chaindb: fix getCoin.

---
 lib/blockchain/chaindb.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/blockchain/chaindb.js b/lib/blockchain/chaindb.js
index 59b6691e..8b5828b7 100644
--- a/lib/blockchain/chaindb.js
+++ b/lib/blockchain/chaindb.js
@@ -844,15 +844,14 @@ ChainDB.prototype.getTips = function getTips() {
  * Get a coin (unspents only).
  * @method
  * @private
- * @param {Outpoint} outpoint
+ * @param {Outpoint} prevout
  * @returns {Promise} - Returns {@link CoinEntry}.
  */
 
-ChainDB.prototype.readCoin = async function readCoin(outpoint) {
+ChainDB.prototype.readCoin = async function readCoin(prevout) {
+  let {hash, index} = prevout;
+  let key = prevout.toKey();
   let state = this.state;
-  let key = outpoint.toKey();
-  let hash = outpoint.hash;
-  let index = outpoint.index;
   let raw;
 
   if (this.options.spv)
@@ -885,6 +884,10 @@ ChainDB.prototype.readCoin = async function readCoin(outpoint) {
 ChainDB.prototype.getCoin = async function getCoin(hash, index) {
   let prevout = new Outpoint(hash, index);
   let coin = await this.readCoin(prevout);
+
+  if (!coin)
+    return;
+
   return coin.toCoin(prevout);
 };