Merge pull request #287 from isocolsky/confirmed_first

Improve prioritization of confirmed vs unconfirmed UTXOs

lib/server.js

@@ -769,17 +769,16 @@ WalletService.prototype._selectTxInputs = function(txp, cb) {
   var self = this;
 
   function sortUtxos(utxos) {
-    var confirmed = [];
-    var unconfirmed = [];
-
     _.each(utxos, function(utxo) {
-      if (utxo.confirmations > 0) {
-        confirmed.push(utxo);
+      if (utxo.confirmations == 0) {
+        utxo.confirmationLevel = 0;
+      } else if (utxo.confirmations < 6) {
+        utxo.confirmationLevel = -1;
       } else {
-        unconfirmed.push(utxo);
+        utxo.confirmationLevel = -2;
       }
     });
-    return confirmed.concat(unconfirmed);
+    return _.sortBy(utxos, 'confirmationLevel');
   };
 
   self._getUtxos(function(err, utxos) {