6. Wechat Calls Payment Reference

only for Mini Program Payment and App Payment

Wechat Mini Program Payment

• The merchant first calls the WebPay Create to generate a prepayment order, and obtain the metadata.wechatpay before transferring it to the app to initiate payment.

• Then the merchant calls wx.requestPayment(OBJECT) in the Mini Program to start WeChat Pay. Wechat Official Doc (opens new window)

  with Promise style call: Supported

  Mini Program plugin: Not supported

  Wechat Windows version: Supported

  Wechat Mac version: Supported

Request Parameters

parameter name	required	type of data	description
timeStamp	Yes	string	timestamp, get it from metadata.wechatpay.timeStamp returned by WebPay Create
nonceStr	Yes	string	random string, get it from metadata.wechatpay.nonceStr returned by WebPay Create
package	Yes	string	extension order details, get it from metadata.wechatpay.pkg returned by WebPay Create
signType	Yes	string	Signature Method, get it from metadata.wechatpay.signType returned by WebPay Create
paySign	Yes	string	Signature, get it from metadata.wechatpay.paySign returned by WebPay Create
success	No	function	Callback function for successful interface call
fail	No	function	Callback function for interface call failure
complete	No	function	The callback function for the end of the interface call (will be executed if the call succeeds or fails)

CallBack Result

Callback Type	errMsg	description
success	requestPayment:ok	Calling payment successful
fail	requestPayment:fail cancel	User cancels payment
fail	requestPayment:fail (detail message)	Failed to call payment. The detail message is the specific failure reason returned by the backend

Request example

wx.requestPayment(
{
    "timeStamp": "1414561699",
    "nonceStr": "5K8264ILTKch16CQ2502SI8ZNMTM67VS",
    "package": "prepay_id=wx201410272009395522657a690389285100",
    "signType": "RSA",
    "paySign": "UGRwhudhVf7UcGcunXt8cqNjKNqZLhLw4jq\/xDg==",
    'success':function(res){},
    'fail':function(res){},
    'complete':function(res){}
})