Javascript-WeChat public account payment interface problems

When calling the public account for payment, the following prompt is displayed: "The merchant has called the payment interface incorrectly. Merchants who have completed the transaction interface upgrade should use the Xinjiekou for transaction ". The call code is as follows: {code...} data is passed in by the backend. No problem occurs when all parameters are generated. Which of the following tips will pop up when you call a public account to pay? "The merchant has called the payment interface incorrectly. Merchants who have completed the upgrade of the transaction interface should use the Xinjiekou for transactions ".
The call code is as follows:

WeixinJSBridge. invoke ('getbrandwcpayrequest', {"appId": data. appid, // The Name Of The Public Account, which is "timeStamp": data. timeStamp, // timeStamp, the number of seconds since 1970 "nonceStr": data. nonce_str, // random string "package": data. prepay_id, "signType": "MD5", // signature method: "paySign": data. sign}, function (res) {if (res. err_msg = "get_brand_wcpay_request: OK") {// alert ('payment successful ')}});

Data is passed in by the backend. All parameters are generated.
I am very grateful to anyone who helps me solve this problem.

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When calling the public account for payment, the following prompt is displayed: "The merchant has called the payment interface incorrectly. Merchants who have completed the transaction interface upgrade should use the Xinjiekou for transaction ".
The call code is as follows:

WeixinJSBridge. invoke ('getbrandwcpayrequest', {"appId": data. appid, // The Name Of The Public Account, which is "timeStamp": data. timeStamp, // timeStamp, the number of seconds since 1970 "nonceStr": data. nonce_str, // random string "package": data. prepay_id, "signType": "MD5", // signature method: "paySign": data. sign}, function (res) {if (res. err_msg = "get_brand_wcpay_request: OK") {// alert ('payment successful ')}});

Data is passed in by the backend. All parameters are generated.
I am very grateful to anyone who helps me solve this problem.

We recommend that you forcibly convert the returned results according to the instructions in the document.

Three questions:

1. check whether all the parameters are passed. 2. Ask the backend signature method. 3. For details, refer to the official js api! Look at the latest (http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html) Your Way seems outdated ~~~

With: https://github.com/thenbsp/wechat

Https://github.com/chanjarster/weixin-java-tools/wiki