service/library/payclients/wxpaycli/client.go

package wxpaycli

import (
	"context"
	"net/http"
	"os"
	"time"

	"github.com/go-pay/gopay"
	wxpay "github.com/go-pay/gopay/wechat/v3"

	"service/bizcommon/util"
	"service/library/configcenter"
	"service/library/logger"
)

const (
	DefaultOrderTimeoutSeconds = 900 // 默认订单超时时间，单位: s
)

var defaultWxpayClient *WxpayClient

type WxpayClient struct {
	*wxpay.ClientV3
	AppId     string `json:"app_id"`
	NotifyUrl string `json:"notify_url"`
}

func GetDefaultWxpayClient() *WxpayClient {
	return defaultWxpayClient
}

func Init(cfg *configcenter.WxpayClientConfig) (err error) {
	// private key
	bs, err := os.ReadFile(cfg.PrivateKeyPath)
	if err != nil {
		logger.Error("real PrivateKeyPath fail, cfg: %v, err: %v", util.ToJson(cfg), err)
		return
	}
	privateKey := string(bs)

	wxpayCli, err := wxpay.NewClientV3(cfg.MchId, cfg.SerialNo, cfg.ApiV3Key, privateKey)
	if err != nil {
		logger.Error("NewClientV3 fail, cfg: %v, err: %v", util.ToJson(cfg), err)
		return
	}

	defaultWxpayClient = &WxpayClient{
		ClientV3:  wxpayCli,
		AppId:     cfg.AppId,
		NotifyUrl: cfg.NotifyUrl,
	}
	return
}

// 验签
func (c *WxpayClient) ParseNotify(req *http.Request) (notify *wxpay.V3DecryptResult, err error) {
	notifyReq, err := wxpay.V3ParseNotify(req)
	if err != nil {
		logger.Error("V3ParseNotify fail, notifyReq: %v, err: %v", util.ToJson(notifyReq), err)
		return
	}
	if notifyReq == nil {
		logger.Error("V3ParseNotify nil, err: %v", err)
		return
	}

	notifyTmp, err := notifyReq.DecryptCipherText(string(c.ApiV3Key))
	if err != nil {
		logger.Error("DecryptCipherText fail, notifyTmp: %v, err: %v", util.ToJson(notifyTmp), err)
		return
	}
	if notifyTmp == nil {
		logger.Error("DecryptCipherText nil, err: %v", err)
		return
	}
	logger.Info("Wxpay ParseNotify, %v", util.ToJson(notifyTmp))

	notify = notifyTmp
	return
}

// 微信支付 native支付
type NativePayParam struct {
	Description    string
	OutTradeNo     string // 商家订单id，我们自己的订单id
	TotalAmount    int64  // 金额，单位：分
	TimeOutSeconds int    // 订单有效时间，单位：秒
}

func (c *WxpayClient) NativePay(ctx context.Context, param *NativePayParam) (wxpayNativeParamStr string, err error) {
	if param.TimeOutSeconds <= 0 {
		param.TimeOutSeconds = DefaultOrderTimeoutSeconds
	}
	bm := gopay.BodyMap{
		"appid":        c.AppId,
		"description":  param.Description,
		"out_trade_no": param.OutTradeNo,
		"time_expire":  time.Now().Add(time.Second * time.Duration(param.TimeOutSeconds)).Format(time.RFC3339),
		"notify_url":   c.NotifyUrl,
		"amount": gopay.BodyMap{
			"total":    param.TotalAmount,
			"currency": "CNY",
		},
	}
	resp, err := c.V3TransactionNative(ctx, bm)
	if err != nil {
		return
	}
	if resp.Code != wxpay.Success {
		logger.Info("wxpay NativePay fail, code: %v, error: %v, response: %v", resp.Code, resp.Error, util.ToJson(resp.Response))
		return
	}
	wxpayNativeParamStr = resp.Response.CodeUrl
	logger.Info("wxpay NativePay success, code: %v, error: %v, response: %v", resp.Code, resp.Error, util.ToJson(resp.Response))
	return
}