Payment Request API

✅ Payment Request API

☑️ Request Message Parameters(JSON Format)

Params Name	Description	Required	Notes
userId	APP ID registered in WeChat https://open.weixin.qq.com	Y	e.g. wxcbb0a73d2d5a8888
amount	Transaction amount in cent	Y	String, "100" for 1.00 dollar
bizType	Business type	Y	WECHATPAY
merchant_id	Merchant ID in OTT PAY	Y	Provided by OTTPay
operator_id	Operator ID from OTT PAY	Y	Provided by OTTPay
order_id	you own order id	N	string, your own order id
call_back_url	Call back URL	Y	Call back data from OTT Pay, shown in the payment completion page

☑️ Request Data Example

{
 "userId": "wxcbb0a73d2d5a8888”, 
 "amount": "100", 
 "bizType": "WECHATPAY", 
 "merchant_id": "AB00000004", 
 "shopId": "", 
 "operator_id": "0000000005", 
 "tip": ""
}

✅ Response Message Parameter

The response message contains all the required parameters to activate the client’s WeChat Wallet.

Params Name	Description	Required	Notes
appId	APP ID registered https://open.weixin.qq.com required by WeChat Pay	Y	wxcbb0a73d2d5a8888
bizType	Business type	Y	WECHATPAY
nonceStr	Random string required by WeChat Pay	Y	Random string
package_	String, required by WeChat Pay, must be “Sign=WXPay”	Y	Sign=WXPay
partnerId	PartnerId required by WeChat Pay	Y	XXXXXXXXXXX
paySign	Sign Key in OTT Pay request	N	DBC7B6ED46BE81E927CAA1922A83BE91
prepayId	prepayId obtained from WeChat Pay associated with the current transaction, required by WeChat Pay	Y	wx22014816274706c6ad56f2412344704275
reAmount	Available refund amount for this transaction	N	String, "100" for 1.00 dollar
timeStamp	Time Stamp required by WeChat Pay	Y	2018112112
tradeNo	Transaction Id for OTT Pay	N	1542822494862703
wxapikey	API key, required by WeChat Pay	Y	XXXXXXXXXXXXXXXXXXXXXXXXXXXXX

☑️ Response Message Data Example:

{
"appId":"wxcbb0a73d2d5a8888",
"bizType":"WECHATPAY",
"nonceStr":"hieqzx0aK8sXTdMq",
"package_":"Sign=WXPay",
"partnerId":"XXXXXXXXXX",
"paySign":"DBC7B6ED46BE81E927CAA1922A83BE91",
"prepay_id":"wx22014816274706c6ad56f2412344704275",
"reAmount":"100",
"timeStamp":"2018112112",
"tradeNo":"1542822494862703",
"wxapikey":"XXXXXXXXXXXXXXXXXXXXXX"
}

通过WeChat SDK jar包调起WeChat Wallet支付, 需要用 appId, partnerId, prepayId, packageValue, timestamp, nonceStr, timestamp and Sign参数。其中Sign需要用WeChat Pay的sign creation logic 产生，示例如下：

To activate WeChat Wallet through WeChat SDK jar package needs following parameters: appId, partnerId, prepayId, packageValue, timestamp, nonceStr, timestamp and Sign. The Sign needs the WeChat Pay’s sign creation logic to generate, for example:

private String genAppSign(List<NameValuePair> params, String WECHAT_API_KEY) {
 StringBuilder sb = new StringBuilder();for (int i = 0; i < params.size(); i++) {
 sb.append(params.get(i).getName());
 sb.append('=');
 sb.append(params.get(i).getValue());
 sb.append('&');
 }
 sb.append("key=");
 sb.append(WECHAT_API_KEY);
 String appSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
 Log.d("test_api", "sign=" + appSign);
 return appSign;
}
 where params list is created by:
List<NameValuePair> signParams = new LinkedList<NameValuePair>();
signParams.add(new BasicNameValuePair("appid", appid));
signParams.add(new BasicNameValuePair("noncestr", nonceStr));
signParams.add(new BasicNameValuePair("package", packageValue));
signParams.add(new BasicNameValuePair("partnerid", partnerId));
signParams.add(new BasicNameValuePair("prepayid", prepayId));
signParams.add(new BasicNameValuePair("timestamp", timeStamp));
String sign = ss(signParams, );
 Finally， we can use these parameters to construct the PayReq request as:
PayReq req = new PayReq();
req.appId = appid;
req.partnerId = partnerId;
req.prepayId = prepayId;
req.packageValue = packageValue;
req.nonceStr = nonceStr;
req.timeStamp = timeStamp;
req.sign = sign;
Which can be used to raise the Wechat Wallet as:
private IWXAPI api;
…
api.sendReq(req);

Please note: IWXAP, PayReq are java class defined by WeChat SDK.

☑️ Call-Back Message Data

Params Name	Description	Required	Notes
rsp_code	Response code	Y	Refer to Appendix B
rsp_msg	Response message	Y
merchant_id	Merchant ID	Y	Merchant ID
finish_time	Payment time	Y	YYYYMMDDHHMMSS (Beijing time)
order_id	Order ID	Y
amount	Transaction amount	Y	String, "100" for 1.00 dollar
md5	Message Digest	Y

☑️ Call-Back Message Example(JSON Data):

 {
  "data":"hy0yiXxPH4TDXeY5ET7gqIsUcgY5ykO1vQYOahS5SsbN7/5Ha7+hvcXhgY1hz9kHuf5OxqNfv28kVeiYACrLzngk+hA2o8dVAcifT6h3AquN5micrIi3L9owj6cHT1nJRExC74sNUqF8CDY5fb4jLh9it9tq7r8xFOpcpf19VNWceo/Jt1nHca6HPMvMUEDeX1aUjnxOs7R7B2TUQbAENg\u003d\u003d",
  "rsp_code":"SUCCESS",
  "rsp_msg":"success",
  "merchant_id":"QC00005496",
  "md5":"F70CA0472D1AAA596E720C19A1DD36A0"
 }

☑️ Transaction Data (JSON format, after decrypted)

Params Name	Description	Required	Notes
finish_time	Payment time	Y	YYYYMMDDHHMMSS (Beijing time)
order_id	Order ID	Y
amount	Transaction amount	Y	String, "100" for 1.00 dollar
tip	Tip Amount	N	String, "100" for 1.00 dollar
bizpay_order_id	order id from Acquirer	Y	Returned by the Payment Service Provider (e.g. WeChat Pay, Alipay)
merchant_id	Merchant ID	Y	Provided by OTT Pay

☑️ Data Example(JSON Data, after decrypted):

{
 "amount":"1",
 "bizpay_order_id":"AL781266859681754",
 "tip":"0",
 "merchant_id":"QC00005496",
 "order_id":"2020041553699O153O0407",
 "finish_time":"20200416050429"
}

👉 Call back data中的 data是加密过的数据，参考appendix A进行解密处理。

Data in Call back data in encrypted, refer to appendix A for decryption.

👉 Please reference our Android demo code for details.

12MB

inapppay_demo_code(WeChat Pay).zip

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WebChat Pay for Mobile App Demo Codes