Cache setup promise

lib/api.js

@@ -158,6 +158,8 @@ var Steem = function (_EventEmitter) {
     value: function getApiIds() {
       var _this3 = this;
 
+      if (this.apiIdsP) return this.apiIdsP;
+
       this.apiIdsP = _bluebird2.default.map(Object.keys(this.apiIds), function (name) {
         debugSetup('Syncing API IDs', name);
         return _this3.getApiByNameAsync(name).then(function (result) {

src/api.js

@@ -115,6 +115,8 @@ class Steem extends EventEmitter {
   }
 
   getApiIds() {
+    if (this.apiIdsP) return this.apiIdsP;
+
     this.apiIdsP = Promise.map(Object.keys(this.apiIds), (name) => {
       debugSetup('Syncing API IDs', name);
       return this.getApiByNameAsync(name).then((result) => {