283 lines
8.4 KiB
Go
283 lines
8.4 KiB
Go
package payment
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import (
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"context"
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"net/http"
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"strconv"
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"sync/atomic"
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"time"
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"github.com/shopspring/decimal"
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"github.com/smartwalle/alipay/v3"
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)
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type AlipayConfig struct {
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AppID string
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PrivateKey string
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AlipayPublicKey string
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IsProduction bool
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NotifyUrl string
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ReturnURL string // 同步回调地址
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}
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type AliPayService struct {
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config AlipayConfig
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AlipayClient *alipay.Client
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}
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// NewAliPayService 是一个构造函数，用于初始化 AliPayService
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func NewAliPayService(config AlipayConfig) *AliPayService {
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client, err := alipay.New(config.AppID, config.PrivateKey, config.IsProduction)
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if err != nil {
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panic(fmt.Sprintf("创建支付宝客户端失败: %v", err))
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}
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// 加载支付宝公钥
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err = client.LoadAliPayPublicKey(config.AlipayPublicKey)
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if err != nil {
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panic(fmt.Sprintf("加载支付宝公钥失败: %v", err))
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}
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return &AliPayService{
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config: config,
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AlipayClient: client,
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}
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}
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func (a *AliPayService) CreateAlipayAppOrder(amount decimal.Decimal, subject string, outTradeNo string) (string, error) {
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client := a.AlipayClient
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totalAmount := amount.StringFixed(2) // 保留2位小数
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// 构造移动支付请求
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p := alipay.TradeAppPay{
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Trade: alipay.Trade{
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Subject: subject,
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OutTradeNo: outTradeNo,
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TotalAmount: totalAmount,
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ProductCode: "QUICK_MSECURITY_PAY", // 移动端支付专用代码
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NotifyURL: a.config.NotifyUrl, // 异步回调通知地址
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},
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}
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// 获取APP支付字符串，这里会签名
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payStr, err := client.TradeAppPay(p)
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if err != nil {
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return "", fmt.Errorf("创建支付宝订单失败: %v", err)
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}
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return payStr, nil
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}
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// CreateAlipayH5Order 创建支付宝H5支付订单
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func (a *AliPayService) CreateAlipayH5Order(amount decimal.Decimal, subject string, outTradeNo string) (string, error) {
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client := a.AlipayClient
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totalAmount := amount.StringFixed(2) // 保留2位小数
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// 构造H5支付请求
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p := alipay.TradeWapPay{
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Trade: alipay.Trade{
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Subject: subject,
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OutTradeNo: outTradeNo,
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TotalAmount: totalAmount,
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ProductCode: "QUICK_WAP_PAY", // H5支付专用产品码
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NotifyURL: a.config.NotifyUrl, // 异步回调通知地址
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ReturnURL: a.config.ReturnURL,
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},
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}
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// 获取H5支付请求字符串，这里会签名
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payUrl, err := client.TradeWapPay(p)
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if err != nil {
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return "", fmt.Errorf("创建支付宝H5订单失败: %v", err)
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}
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return payUrl.String(), nil
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}
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// CreateAlipayPCOrder 创建支付宝PC端支付订单
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func (a *AliPayService) CreateAlipayPCOrder(amount decimal.Decimal, subject string, outTradeNo string) (string, error) {
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client := a.AlipayClient
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totalAmount := amount.StringFixed(2) // 保留2位小数
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// 构造PC端支付请求
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p := alipay.TradePagePay{
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Trade: alipay.Trade{
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Subject: subject,
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OutTradeNo: outTradeNo,
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TotalAmount: totalAmount,
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ProductCode: "FAST_INSTANT_TRADE_PAY", // PC端支付专用产品码
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NotifyURL: a.config.NotifyUrl, // 异步回调通知地址
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ReturnURL: a.config.ReturnURL, // 同步回调地址
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},
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}
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// 获取PC端支付URL，这里会签名
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payUrl, err := client.TradePagePay(p)
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if err != nil {
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return "", fmt.Errorf("创建支付宝PC端订单失败: %v", err)
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}
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return payUrl.String(), nil
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}
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// CreateAlipayOrder 根据平台类型创建支付宝支付订单
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func (a *AliPayService) CreateAlipayOrder(ctx context.Context, platform string, amount decimal.Decimal, subject string, outTradeNo string) (string, error) {
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switch platform {
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case "app":
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// 调用App支付的创建方法
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return a.CreateAlipayAppOrder(amount, subject, outTradeNo)
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case "h5":
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// 调用H5支付的创建方法，并传入 returnUrl
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return a.CreateAlipayH5Order(amount, subject, outTradeNo)
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case "pc":
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// 调用PC端支付的创建方法
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return a.CreateAlipayPCOrder(amount, subject, 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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}
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// AliRefund 发起支付宝退款
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func (a *AliPayService) AliRefund(ctx context.Context, outTradeNo string, refundAmount decimal.Decimal) (*alipay.TradeRefundRsp, error) {
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refund := alipay.TradeRefund{
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OutTradeNo: outTradeNo,
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RefundAmount: refundAmount.StringFixed(2), // 保留2位小数
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OutRequestNo: fmt.Sprintf("%s-refund", outTradeNo),
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}
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// 发起退款请求
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refundResp, err := a.AlipayClient.TradeRefund(ctx, refund)
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if err != nil {
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return nil, fmt.Errorf("支付宝退款请求错误：%v", err)
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}
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return refundResp, nil
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}
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// HandleAliPaymentNotification 支付宝支付回调
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func (a *AliPayService) HandleAliPaymentNotification(r *http.Request) (*alipay.Notification, error) {
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// 解析表单
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err := r.ParseForm()
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if err != nil {
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return nil, fmt.Errorf("解析请求表单失败：%v", err)
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}
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// 解析并验证通知，DecodeNotification 会自动验证签名
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notification, err := a.AlipayClient.DecodeNotification(r.Form)
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if err != nil {
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return nil, fmt.Errorf("验证签名失败: %v", err)
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}
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return notification, nil
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}
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func (a *AliPayService) IsAlipayPaymentSuccess(notification *alipay.Notification) bool {
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return notification.TradeStatus == alipay.TradeStatusSuccess
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}
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func (a *AliPayService) QueryOrderStatus(ctx context.Context, outTradeNo string) (*alipay.TradeQueryRsp, error) {
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queryRequest := alipay.TradeQuery{
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OutTradeNo: outTradeNo,
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}
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// 发起查询请求
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resp, err := a.AlipayClient.TradeQuery(ctx, queryRequest)
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if err != nil {
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return nil, fmt.Errorf("查询支付宝订单失败: %v", err)
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}
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// 返回交易状态
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if resp.IsSuccess() {
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return resp, nil
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}
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return nil, fmt.Errorf("查询支付宝订单失败: %v", resp.SubMsg)
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}
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// 添加全局原子计数器
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var alipayOrderCounter uint32 = 0
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// GenerateOutTradeNo 生成唯一订单号的函数 - 优化版本
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func (a *AliPayService) GenerateOutTradeNo() string {
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// 获取当前时间戳（毫秒级）
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timestamp := time.Now().UnixMilli()
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timeStr := strconv.FormatInt(timestamp, 10)
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// 原子递增计数器
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counter := atomic.AddUint32(&alipayOrderCounter, 1)
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// 生成4字节真随机数
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randomBytes := make([]byte, 4)
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_, err := rand.Read(randomBytes)
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if err != nil {
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// 如果随机数生成失败，回退到使用时间纳秒数据
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randomBytes = []byte(strconv.FormatInt(time.Now().UnixNano()%1000000, 16))
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}
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randomHex := hex.EncodeToString(randomBytes)
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// 组合所有部分: 前缀 + 时间戳 + 计数器 + 随机数
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orderNo := fmt.Sprintf("%s%06x%s", timeStr[:10], counter%0xFFFFFF, randomHex[:6])
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// 确保长度不超过32字符（大多数支付平台的限制）
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if len(orderNo) > 32 {
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orderNo = orderNo[:32]
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}
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return orderNo
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}
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// AliTransfer 支付宝单笔转账到支付宝账户（提现功能）
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func (a *AliPayService) AliTransfer(
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ctx context.Context,
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payeeAccount string, // 收款方支付宝账户
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payeeName string, // 收款方姓名
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amount decimal.Decimal, // 转账金额
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remark string, // 转账备注
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outBizNo string, // 商户转账唯一订单号（可使用GenerateOutTradeNo生成）
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) (*alipay.FundTransUniTransferRsp, error) {
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// 参数校验
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if payeeAccount == "" {
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return nil, fmt.Errorf("收款账户不能为空")
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}
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if amount.LessThanOrEqual(decimal.Zero) {
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return nil, fmt.Errorf("转账金额必须大于0")
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}
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// 构造转账请求
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req := alipay.FundTransUniTransfer{
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OutBizNo: outBizNo,
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TransAmount: amount.StringFixed(2), // 保留2位小数
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ProductCode: "TRANS_ACCOUNT_NO_PWD", // 单笔无密转账到支付宝账户
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BizScene: "DIRECT_TRANSFER", // 单笔转账
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OrderTitle: "账户提现", // 转账标题
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Remark: remark,
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PayeeInfo: &alipay.PayeeInfo{
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Identity: payeeAccount,
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IdentityType: "ALIPAY_LOGON_ID", // 根据账户类型选择：
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Name: payeeName,
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// ALIPAY_USER_ID/ALIPAY_LOGON_ID
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},
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}
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// 执行转账请求
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transferRsp, err := a.AlipayClient.FundTransUniTransfer(ctx, req)
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if err != nil {
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return nil, fmt.Errorf("支付宝转账请求失败: %v", err)
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}
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return transferRsp, nil
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}
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func (a *AliPayService) QueryTransferStatus(
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ctx context.Context,
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outBizNo string,
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) (*alipay.FundTransOrderQueryRsp, error) {
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req := alipay.FundTransOrderQuery{
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OutBizNo: outBizNo,
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}
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response, err := a.AlipayClient.FundTransOrderQuery(ctx, req)
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if err != nil {
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return nil, fmt.Errorf("支付宝接口调用失败: %v", err)
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}
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// 处理响应
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if response.Code.IsFailure() {
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return nil, fmt.Errorf("支付宝返回错误: %s-%s", response.Code, response.Msg)
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}
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return response, nil
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}
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