From e82950a6e846552745e9483208cc088b39197fb7 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Wed, 11 Jan 2017 19:07:20 -0800
Subject: [PATCH] uri: allow empty keys.

---
 lib/btc/uri.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/lib/btc/uri.js b/lib/btc/uri.js
index 006b0388..e293822b 100644
--- a/lib/btc/uri.js
+++ b/lib/btc/uri.js
@@ -8,7 +8,6 @@
 
 var util = require('../utils/util');
 var Address = require('../primitives/address');
-var KeyRing = require('../primitives/keyring');
 var Amount = require('./amount');
 var assert = require('assert');
 
@@ -17,11 +16,9 @@ var assert = require('assert');
  * @constructor
  * @param {Object|String} options
  * @property {Address} address
- * @property {Number|-1} version
  * @property {Amount} amount
  * @property {String|null} label
  * @property {String|null} message
- * @property {KeyRing|null} key
  * @property {String|null} request
  */
 
@@ -201,10 +198,9 @@ function BitcoinQuery() {
 function parsePairs(str) {
   var parts = str.split('&');
   var data = new BitcoinQuery();
+  var size = 0;
   var i, index, pair, key, value;
 
-  assert(parts.length <= 4, 'Too many keys in querystring.');
-
   for (i = 0; i < parts.length; i++) {
     pair = parts[i];
     index = pair.indexOf('=');
@@ -217,6 +213,13 @@ function parsePairs(str) {
       value = pair.substring(index + 1);
     }
 
+    if (key.length === 0) {
+      assert(value.length === 0, 'Empty key in querystring.');
+      continue;
+    }
+
+    assert(size < 4, 'Too many keys in querystring.');
+
     switch (key) {
       case 'amount':
         assert(data.amount == null, 'Duplicate key in querystring (amount).');
@@ -238,6 +241,8 @@ function parsePairs(str) {
         assert(false, 'Unknown querystring key: ' + value);
         break;
     }
+
+    size++;
   }
 
   return data;