248 lines
8.6 KiB
Go
248 lines
8.6 KiB
Go
package service
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import (
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"context"
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"fmt"
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"github.com/wechatpay-apiv3/wechatpay-go/core"
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"github.com/wechatpay-apiv3/wechatpay-go/core/auth/verifiers"
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"github.com/wechatpay-apiv3/wechatpay-go/core/downloader"
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"github.com/wechatpay-apiv3/wechatpay-go/core/notify"
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"github.com/wechatpay-apiv3/wechatpay-go/core/option"
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"github.com/wechatpay-apiv3/wechatpay-go/services/payments"
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"github.com/wechatpay-apiv3/wechatpay-go/services/payments/app"
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"github.com/wechatpay-apiv3/wechatpay-go/services/payments/jsapi"
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"github.com/wechatpay-apiv3/wechatpay-go/services/refunddomestic"
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"github.com/wechatpay-apiv3/wechatpay-go/utils"
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"github.com/zeromicro/go-zero/core/logx"
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"net/http"
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"strconv"
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"time"
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"tydata-server/app/user/cmd/api/internal/config"
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"tydata-server/pkg/lzkit/lzUtils"
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)
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const (
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TradeStateSuccess = "SUCCESS" // 支付成功
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TradeStateRefund = "REFUND" // 转入退款
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TradeStateNotPay = "NOTPAY" // 未支付
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TradeStateClosed = "CLOSED" // 已关闭
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TradeStateRevoked = "REVOKED" // 已撤销（付款码支付）
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TradeStateUserPaying = "USERPAYING" // 用户支付中（付款码支付）
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TradeStatePayError = "PAYERROR" // 支付失败（其他原因，如银行返回失败）
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)
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type WechatPayService struct {
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config config.WxpayConfig
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wechatClient *core.Client
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notifyHandler *notify.Handler
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}
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// NewWechatPayService 初始化微信支付服务
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func NewWechatPayService(c config.Config) *WechatPayService {
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// 从配置中加载商户信息
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mchID := c.Wxpay.MchID
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mchCertificateSerialNumber := c.Wxpay.MchCertificateSerialNumber
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mchAPIv3Key := c.Wxpay.MchApiv3Key
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// 从文件中加载商户私钥
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mchPrivateKey, err := utils.LoadPrivateKeyWithPath(c.Wxpay.MchPrivateKeyPath)
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if err != nil {
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logx.Errorf("加载商户私钥失败: %v", err)
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panic(fmt.Sprintf("初始化失败，服务停止: %v", err)) // 记录错误并停止程序
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}
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// 使用商户私钥和其他参数初始化微信支付客户端
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opts := []core.ClientOption{
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option.WithWechatPayAutoAuthCipher(mchID, mchCertificateSerialNumber, mchPrivateKey, mchAPIv3Key),
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}
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client, err := core.NewClient(context.Background(), opts...)
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if err != nil {
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logx.Errorf("创建微信支付客户端失败: %v", err)
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panic(fmt.Sprintf("初始化失败，服务停止: %v", err)) // 记录错误并停止程序
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}
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// 在初始化时获取证书访问器并创建 notifyHandler
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certificateVisitor := downloader.MgrInstance().GetCertificateVisitor(mchID)
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notifyHandler, err := notify.NewRSANotifyHandler(mchAPIv3Key, verifiers.NewSHA256WithRSAVerifier(certificateVisitor))
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if err != nil {
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logx.Errorf("获取证书访问器失败: %v", err)
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panic(fmt.Sprintf("初始化失败，服务停止: %v", err)) // 记录错误并停止程序
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}
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return &WechatPayService{
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config: c.Wxpay,
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wechatClient: client,
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notifyHandler: notifyHandler,
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}
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}
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// CreateWechatAppOrder 创建微信APP支付订单
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func (w *WechatPayService) CreateWechatAppOrder(ctx context.Context, amount float64, description string, outTradeNo string) (string, error) {
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totalAmount := lzUtils.ToWechatAmount(amount)
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// 构建支付请求参数
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payRequest := app.PrepayRequest{
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Appid: core.String(w.config.AppID),
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Mchid: core.String(w.config.MchID),
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Description: core.String(description),
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OutTradeNo: core.String(outTradeNo),
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NotifyUrl: core.String(w.config.NotifyUrl),
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Amount: &app.Amount{
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Total: core.Int64(totalAmount),
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},
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}
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// 初始化 AppApiService
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svc := app.AppApiService{Client: w.wechatClient}
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// 发起预支付请求
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resp, result, err := svc.Prepay(ctx, payRequest)
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if err != nil {
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return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
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}
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// 返回预支付交易会话标识
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return *resp.PrepayId, nil
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}
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// CreateWechatMiniProgramOrder 创建微信小程序支付订单
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func (w *WechatPayService) CreateWechatMiniProgramOrder(ctx context.Context, amount float64, description string, outTradeNo string, openid string) (string, error) {
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totalAmount := lzUtils.ToWechatAmount(amount)
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// 构建支付请求参数
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payRequest := jsapi.PrepayRequest{
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Appid: core.String(w.config.AppID),
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Mchid: core.String(w.config.MchID),
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Description: core.String(description),
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OutTradeNo: core.String(outTradeNo),
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NotifyUrl: core.String(w.config.NotifyUrl),
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Amount: &jsapi.Amount{
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Total: core.Int64(totalAmount),
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},
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Payer: &jsapi.Payer{
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Openid: core.String(openid), // 用户的 OpenID，通过前端传入
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}}
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// 初始化 AppApiService
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svc := jsapi.JsapiApiService{Client: w.wechatClient}
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// 发起预支付请求
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resp, result, err := svc.PrepayWithRequestPayment(ctx, payRequest)
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if err != nil {
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return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
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}
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// 返回预支付交易会话标识
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return *resp.PrepayId, nil
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}
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// CreateWechatOrder 创建微信支付订单（集成 APP、H5、小程序）
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func (w *WechatPayService) CreateWechatOrder(ctx context.Context, amount float64, description string, outTradeNo string) (string, error) {
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// 根据 ctx 中的 platform 判断平台
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platform := ctx.Value("platform").(string)
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var prepayId string
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var err error
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switch platform {
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case "mp-weixin":
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// 如果是小程序平台，调用小程序支付订单创建
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prepayId, err = w.CreateWechatMiniProgramOrder(ctx, amount, description, outTradeNo, "asdasd")
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case "app":
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// 如果是 APP 平台，调用 APP 支付订单创建
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prepayId, err = w.CreateWechatAppOrder(ctx, amount, description, outTradeNo)
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default:
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return "", fmt.Errorf("不支持的支付平台: %s", platform)
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}
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// 如果创建支付订单失败，返回错误
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if err != nil {
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return "", fmt.Errorf("支付订单创建失败: %v", err)
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}
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// 返回预支付ID
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return prepayId, nil
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}
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// HandleWechatPayNotification 处理微信支付回调
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func (w *WechatPayService) HandleWechatPayNotification(ctx context.Context, req *http.Request) (*payments.Transaction, error) {
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transaction := new(payments.Transaction)
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_, err := w.notifyHandler.ParseNotifyRequest(ctx, req, transaction)
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if err != nil {
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return nil, fmt.Errorf("微信支付通知处理失败: %v", err)
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}
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// 返回交易信息
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return transaction, nil
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}
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// HandleRefundNotification 处理微信退款回调
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func (w *WechatPayService) HandleRefundNotification(ctx context.Context, req *http.Request) (*refunddomestic.Refund, error) {
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refund := new(refunddomestic.Refund)
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_, err := w.notifyHandler.ParseNotifyRequest(ctx, req, refund)
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if err != nil {
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return nil, fmt.Errorf("微信退款回调通知处理失败: %v", err)
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}
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return refund, nil
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}
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// QueryOrderStatus 主动查询订单状态
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func (w *WechatPayService) QueryOrderStatus(ctx context.Context, transactionID string) (*payments.Transaction, error) {
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svc := jsapi.JsapiApiService{Client: w.wechatClient}
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// 调用 QueryOrderById 方法查询订单状态
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resp, result, err := svc.QueryOrderById(ctx, jsapi.QueryOrderByIdRequest{
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TransactionId: core.String(transactionID),
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Mchid: core.String(w.config.MchID),
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})
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if err != nil {
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return nil, fmt.Errorf("订单查询失败: %v, 状态码: %d", err, result.Response.StatusCode)
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}
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return resp, nil
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}
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// WeChatRefund 申请微信退款
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func (w *WechatPayService) WeChatRefund(ctx context.Context, outTradeNo string, refundAmount float64, totalAmount float64) error {
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// 生成唯一的退款单号
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outRefundNo := fmt.Sprintf("%s-refund", outTradeNo)
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// 初始化退款服务
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svc := refunddomestic.RefundsApiService{Client: w.wechatClient}
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// 创建退款请求
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resp, result, err := svc.Create(ctx, refunddomestic.CreateRequest{
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OutTradeNo: core.String(outTradeNo),
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OutRefundNo: core.String(outRefundNo),
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NotifyUrl: core.String(w.config.RefundNotifyUrl),
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Amount: &refunddomestic.AmountReq{
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Currency: core.String("CNY"),
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Refund: core.Int64(lzUtils.ToWechatAmount(refundAmount)),
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Total: core.Int64(lzUtils.ToWechatAmount(totalAmount)),
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},
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})
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if err != nil {
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return fmt.Errorf("微信订单申请退款错误: %v", err)
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}
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// 打印退款结果
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logx.Infof("退款申请成功，状态码=%d，退款单号=%s，微信退款单号=%s", result.Response.StatusCode, *resp.OutRefundNo, *resp.RefundId)
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return nil
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}
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// GenerateOutTradeNo 生成唯一订单号
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func (w *WechatPayService) GenerateOutTradeNo() string {
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length := 16
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timestamp := time.Now().UnixNano()
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timeStr := strconv.FormatInt(timestamp, 10)
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randomPart := strconv.Itoa(int(timestamp % 1e6))
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combined := timeStr + randomPart
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if len(combined) >= length {
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return combined[:length]
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}
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for len(combined) < length {
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combined += strconv.Itoa(int(timestamp % 10))
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}
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return combined
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}
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