update

app/customer/hdl/hdl_pay.go

@@ -49,14 +49,14 @@ func BuyPackageForWx(c *gin.Context) {
 		return
 	}
 	fmt.Println("req>>>>>>>>>>>>", utils.Serialize(req))
-	outTradeNo, prepayId, total, err := svc.BuyPackageForWx(c, req)
+	outTradeNo, resp, total, err := svc.BuyPackageForWx(c, req)
 	if err != nil {
 		e.OutErr(c, e.ERR, err.Error())
 		return
 	}
 	e.OutSuc(c, map[string]interface{}{
 		"out_trade_no": outTradeNo,
-		"prepay_id":    prepayId,
+		"prams":        resp,
 		"total":        total,
 	}, nil)
 	return

app/customer/svc/svc_pay.go

@@ -15,8 +15,11 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/wechatpay-apiv3/wechatpay-go/core"
 	"github.com/wechatpay-apiv3/wechatpay-go/services/partnerpayments/jsapi"
+	jsapi2 "github.com/wechatpay-apiv3/wechatpay-go/services/payments/jsapi"
+	utils2 "github.com/wechatpay-apiv3/wechatpay-go/utils"
 	"io/ioutil"
 	"net/url"
+	"strconv"
 	"time"
 )
 
@@ -134,7 +137,7 @@ func BuyPackageForAli(c *gin.Context, req md.BuyPackageReq) (outTradeNo, tradeNo
 	return
 }
 
-func BuyPackageForWx(c *gin.Context, req md.BuyPackageReq) (outTradeNo, prepayId, total string, err error) {
+func BuyPackageForWx(c *gin.Context, req md.BuyPackageReq) (outTradeNo, total string, resp *jsapi2.PrepayWithRequestPaymentResponse, err error) {
 	user := GetUser(c)
 	session := db.Db.NewSession()
 	defer session.Close()
@@ -202,7 +205,7 @@ func BuyPackageForWx(c *gin.Context, req md.BuyPackageReq) (outTradeNo, prepayId
 	wxSvc := jsapi.JsapiApiService{Client: client}
 	sysCfg := sysCfgDb.SysCfgFindWithDb(enum2.WxSpAppId, enum2.WxSpMchId, enum2.WxAppletAppId, enum2.WxMchId, enum2.WxJsapiPayNotifyUrl)
 
-	resp, _, err := wxSvc.Prepay(c,
+	result, _, err := wxSvc.Prepay(c,
 		jsapi.PrepayRequest{
 			SpAppid:     core.String(sysCfg[enum2.WxSpAppId]),
 			SpMchid:     core.String(sysCfg[enum2.WxSpMchId]),
@@ -256,7 +259,27 @@ func BuyPackageForWx(c *gin.Context, req md.BuyPackageReq) (outTradeNo, prepayId
 		return
 	}
 	session.Commit()
-	prepayId = *resp.PrepayId
+	//prepayId = *resp.PrepayId
+	resp = new(jsapi2.PrepayWithRequestPaymentResponse)
+	resp.PrepayId = result.PrepayId
+	resp.SignType = core.String("RSA")
+	appid := sysCfg[enum2.WxSpAppId]
+	resp.Appid = &appid
+	resp.TimeStamp = core.String(strconv.FormatInt(time.Now().Unix(), 10))
+	nonce, err := utils2.GenerateNonce()
+	if err != nil {
+		_ = session.Rollback()
+		return
+	}
+	resp.NonceStr = core.String(nonce)
+	resp.Package = core.String("prepay_id=" + *result.PrepayId)
+	message := fmt.Sprintf("%s\n%s\n%s\n%s\n", *resp.Appid, *resp.TimeStamp, *resp.NonceStr, *resp.Package)
+	signatureResult, err := wxSvc.Client.Sign(c, message)
+	if err != nil {
+		_ = session.Rollback()
+		return
+	}
+	resp.PaySign = core.String(signatureResult.Signature)
 	return
 }