cordova 開發混合app微信支付插件使用問題

微信支付插件：cordova-plugin-wechat
文檔地址：https://jasonz1987.github.io/cordova-wechat-docs/docs/get-started
發起支付—官方文檔代碼如下：

var params = {
   partnerid: '10000100', // merchant id
   prepayid: 'wx201411101639507cbf6ffd8b0779950874', // prepay id
   noncestr: '1add1a30ac87aa2db72f57a2375d8fec', // nonce
   timestamp: '1439531364', // timestamp
   sign: '0CB01533B8C1EF103065174F50BCA001', // signed string
 };

 Wechat.sendPaymentRequest(ret.data, function () {
   alert("Success");
 }, function (reason) {
   alert("Failed: " + reason);
 });

這個官方文檔還少了兩個參數，導致我折騰老半天。

var params = {
   appid: 'fnsdiufnsadfnaisdfni',  // appid
   package: 'XXXXX', // package
   partnerid: '10000100', // merchant id
   prepayid: 'wx201411101639507cbf6ffd8b0779950874', // prepay id
   noncestr: '1add1a30ac87aa2db72f57a2375d8fec', // nonce
   timestamp: '1439531364', // timestamp
   sign: '0CB01533B8C1EF103065174F50BCA001', // signed string
 };