From 18eea4be00ce03bb1af4a78372a7fe8c79d6ea41 Mon Sep 17 00:00:00 2001
From: Federico Bond <federicobond@gmail.com>
Date: Mon, 16 Jul 2018 22:54:50 -0300
Subject: [PATCH] Fix getFee returning value instead of failing when called
 twice

---
 lib/transaction/transaction.js | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/transaction/transaction.js b/lib/transaction/transaction.js
index cc669e235..7a671cf43 100644
--- a/lib/transaction/transaction.js
+++ b/lib/transaction/transaction.js
@@ -899,13 +899,11 @@ Transaction.prototype._getOutputAmount = function() {
  */
 Transaction.prototype._getInputAmount = function() {
   if (_.isUndefined(this._inputAmount)) {
-    var self = this;
-    this._inputAmount = 0;
-    _.each(this.inputs, function(input) {
+    this._inputAmount = _.sumBy(this.inputs, function(input) {
       if (_.isUndefined(input.output)) {
         throw new errors.Transaction.Input.MissingPreviousOutput();
       }
-      self._inputAmount += input.output.satoshis;
+      return input.output.satoshis;
     });
   }
   return this._inputAmount;