使用微信小程序拉起支付v3版本，"签名失败”

[ctra-wang]

package order

import (
	"context"
	"fmt"
	"gitee.com/ctra/ctra-go-common.git/constant"
	"gitee.com/ctra/ctra-go-common.git/ctxdata"
	"gitee.com/ctra/ctra-go-common.git/xerr"
	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/pkg/xlog"
	"github.com/go-pay/gopay/wechat"
	"strconv"
	"time"

	"gitee.com/ctra/ctra-go-weixin.git/api/internal/svc"
	"gitee.com/ctra/ctra-go-weixin.git/api/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type WxPaymentLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewWxPaymentLogic(ctx context.Context, svcCtx *svc.ServiceContext) *WxPaymentLogic {
	return &WxPaymentLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *WxPaymentLogic) WxPayment(req *types.WxPaymentReq) (resp *types.CommonDetailResp, err error) {
	// ------------------	获取 context 上下文 内容	------------------
	// 获取token中 openid
	openid := ctxdata.GetStrParamFromJwt(l.ctx, ctxdata.CtxKeyJwtOpenid)
	//// 获取 在middleware中设置的，以userId为key，memberInfo的结构体数据
	//memberString := ctxdata.GetStrParamFromJwt(l.ctx, ctxdata.CtxKeyJwtUserId)
	//memberBaseInfo := &member.BaseInfoResp{}
	//err = json.Unmarshal(stringTobyteSlice(memberString), memberBaseInfo)
	//if err != nil {
	//	return &types.CommonDetailResp{Code: int64(xerr.COPIER_TRANSFORM_ERROR), Msg: xerr.MapErrMsg(xerr.COPIER_TRANSFORM_ERROR)}, nil
	//}

	// 获取与
	client, err := l.svcCtx.WeixinPayConfig.NewWeixinPayClient()
	if err != nil {
		l.Logger.Errorf(err.Error())
		return nil, err
	}
	// 过期时间
	expire := time.Now().Add(10 * time.Minute).Format(time.RFC3339)
	// 初始化 BodyMap
	bm := make(gopay.BodyMap)
	bm.Set("appid", constant.MINI_APP_LATEST_ID). // 由于是微信小程序拉起支付：小程序 appid
		//Set("mchid", constant.WXPAY_MCH_ID).
		//	Set("sp_mchid", constant.WXPAY_MCH_ID).
		//	Set("sub_mchid", "").
		Set("description", req.Description).
		Set("out_trade_no", req.TradeNo).
		Set("time_expire", expire).
		Set("goods_tag", req.GoodsTag). //订单优惠标记
		Set("notify_url", constant.CALLBACK_URL).
		SetBodyMap("amount", func(bm gopay.BodyMap) {
			bm.Set("total", req.Amount).
				Set("currency", "CNY")
		}).
		SetBodyMap("payer", func(bm gopay.BodyMap) {
			bm.Set("openid", openid)
		})

	wxRsp, err := client.V3TransactionJsapi(l.ctx, bm)
	if err != nil {
		l.Logger.Errorf(err.Error())
		return nil, xerr.NewEnsumError(xerr.WX_GOPAY_PREPAY_ERROR)
	}

	fmt.Println("-----------------")
	fmt.Println(wxRsp.Code)

	// 拉起支付成功
	if wxRsp.Code == 0 {
		fmt.Printf("wxRsp: %#v \n", wxRsp.Response)

		applet, err := client.PaySignOfApplet(constant.APP_ID, wxRsp.Response.PrepayId)
		if err != nil {
			return nil, err
		}

		//pkMap := client.WxPublicKeyMap()

		//l.Logger.Infof("wxRsp: %#v", wxRsp.Response)
		timeStamp := strconv.FormatInt(time.Now().Unix(), 10)
		res := make(map[string]interface{})
		res["prepayId"] = wxRsp.Response.PrepayId
		res["appId"] = constant.APP_ID
		res["timeStamp"] = timeStamp
		res["package"] = fmt.Sprintf("prepay_id=%s", wxRsp.Response.PrepayId)
		res["nonceStr"] = applet.NonceStr // PaySignOfApp(constant.APP_ID, wxRsp.Response.PrepayId)
		res["signType"] = "MD5"

		//获取小程序支付需要的paySign
		pac := "prepay_id=" + wxRsp.Response.PrepayId
		paySign := wechat.GetMiniPaySign(constant.APP_ID, applet.NonceStr, pac, wechat.SignType_HMAC_SHA256, timeStamp, constant.MCH_API_V3_KEY)
		xlog.Debug("paySign:", paySign)
		res["paySign"] = paySign
		return &types.CommonDetailResp{
			Data: res,
		}, nil
	} else {
		fmt.Printf("wxRsp:%s \n", wxRsp.Error)

		//l.Logger.Errorf("wxRsp:%s", wxRsp.Error)
		return nil, xerr.NewEnsumError(xerr.WX_PREPAY_ERROR)
	}
}

[ctra-wang]

我拿到RSA加密后的 paySign 长度都和标准的不一样呢
"paySign": "CABD15D15B0CC4852D2408283321058E9B82400FB4C8D6A3C99AFA6AF3ECA857",

[iGoogle-ink]

不对吗？报错？