Clear caches when queue empties

src/js/ripple/transactionqueue.js

@@ -6,12 +6,19 @@
 var Transaction = require('./transaction').Transaction;
 
 function TransactionQueue() {
+  var self = this;
+
   this._queue         = [ ];
   this._idCache       = { };
   this._sequenceCache = { };
   this._save          = void(0);
 };
 
+TransactionQueue.prototype.clearCache = function() {
+  this._idCache       = { };
+  this._sequenceCache = { };
+};
+
 TransactionQueue.prototype.save = function() {
   if (typeof this._save !== 'function') return;
 
@@ -89,6 +96,10 @@ TransactionQueue.prototype.remove = function(tx) {
     }
   }
 
+  if (!this._queue.length) {
+    this.clearCache();
+  }
+
   this.save();
 };