简单易用的APIv3版微信支付SDK

介绍

微信支付SDK，基于全新的微信支付APIv3来实现。支持小程序支付、JSAPI支付、Native支付、APP支付、H5支付，支持直连商户模式和服务商模式。

安装说明

go get gitee.com/haming123/wxpay4go

快速上手

1. 商户对象初始化

   package main
   
   import (
    "log"
    "wxpay"
   )
   
   var MchCtx *wxpay.MchWxApp = nil
   func MchCtxInit() error {
    pem_cert, err := wxpay.LoadCertificateWithPath("/path/to/merchant/apiclient_cert.pem")
    if err != nil {
        return err
    }
    pem_key, err := wxpay.LoadPrivateKeyWithPath("/path/to/merchant/apiclient_key.pem")
    if err != nil {
        return err
    }
    MchCtx = wxpay.NewMchWxApp("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
    return nil
   }
   
   func main() {
    //......
    err := MchCtxInit()
    if err != nil {
        log.Print(err)
        return
    }
    //......
   }

2. 支付下单

   func HandlerPayCreateDemo(w http.ResponseWriter, r *http.Request) {
    //................(其他业务逻辑)
    var data_req wxpay.WxAppOrderData
    data_req.Description = "业务描述"
    data_req.Out_trade_no = "业务订单号"
    data_req.Notify_url = "接收支付通知的URL地址"
    data_req.Sub_mchid = "子商户号"
    data_req.Sub_appid = "小程序的APPID"
    data_req.Payer.Sub_openid = "用户在小程序中的OPENID"
    data_req.Amount.Total = 20
    param, err := MchCtx.CreateOrder(data_req)
    if err!= nil {
        log.Print(err)
        return
    }
    //................(其他业务逻辑)
   }

3. 支付订单查询

   func HandlerPayQueryDemo(w http.ResponseWriter, r *http.Request) {
    //................(其他业务逻辑)
    out_trade_no := "业务订单号"
    sub_mchid := "子商户号"
    result, err := MchCtx.QueryByOutTradeNo(out_trade_no, sub_mchid)
    if err!= nil {
        log.Print(err)
        return
    }
    //................(其他业务逻辑)
   }

4. 支付回调处理

   func HandlerPayCallBack(w http.ResponseWriter, r *http.Request) {
    //解析回调数据
    req_info, err := MchCtx.ParsePayCallBack(r)
    if err != nil {
        wxpay.HttpCallBackReturn(w, 500,"FAIL", "FAIL")
        return
    }
   
    //................(其他业务逻辑)
   
    //回调返回
    wxpay.HttpCallBackReturn(w, 200, "SUCCESS", "SUCCESS")
   }

5. 退款申请

   func HandlerRefundDemo(w http.ResponseWriter, r *http.Request) {
    //................(其他业务逻辑)
    var data wxpay.RefundCreateReq
    data.Sub_mchid = "子商户号"
    data.Out_trade_no = "业务订单号"
    data.Out_refund_no = "商户的退款单号"
    data.Amount.Total = 20
    data.Amount.Refund = 20
    data.Notify_url = "退款结果回调的URL"
    result, err := MchCtx.RefundOrder(data)
    if err!= nil {
        log.Print(err)
    }
    //................(其他业务逻辑)
   }

6. 退款回调处理

   func HandlerRefundCallBack(w http.ResponseWriter, r *http.Request) {
    //解析回调数据
    req_info, err := MchCtx.ParseRefundCallBack(r)
    if err != nil {
        wxpay.HttpCallBackReturn(w, 500,"FAIL", "FAIL")
        return
    }
   
    //................(其他业务逻辑)
   
    //回调返回
    wxpay.HttpCallBackReturn(w, 200, "SUCCESS", "SUCCESS")
   }

其他支付产品的使用

1. 直连商户商户对象初始化

   //小程序
   MchCtx = wxpay.NewMchWxApp("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //JsAPi
   MchCtx = wxpay.NewMchJsApi("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //H5
   MchCtx = wxpay.NewMchH5("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //Native
   MchCtx = wxpay.NewMchNative("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //App
   MchCtx = wxpay.NewMchApp("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)

2. 服务商商户对象初始化

   //小程序
   MchCtx = wxpay.NewMidWxApp("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //JsAPi
   MchCtx = wxpay.NewMidJsApi("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //H5
   MchCtx = wxpay.NewMidH5("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //Native
   MchCtx = wxpay.NewMidNative("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)
   //App
   MchCtx = wxpay.NewMidApp("mchID_string", "appID_string", "mchAPIv3Key_string", pem_cert, pem_key)