142 lines
3.4 KiB
Go
142 lines
3.4 KiB
Go
package wechat
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import (
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"bytes"
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"context"
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"fmt"
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"net/http"
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pkgpay "lone-services/pkg/payment"
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wxpay "lone-services/pkg/wechat/pay"
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)
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// Channel wraps WeChat Pay APIv3 client.
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type Channel struct {
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client *wxpay.Client
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}
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func NewChannel(cfg wxpay.Config) (*Channel, error) {
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c, err := wxpay.NewClient(cfg)
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if err != nil {
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return nil, err
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}
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return &Channel{client: c}, nil
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}
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func (c *Channel) Name() string {
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return pkgpay.ChannelWechat
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}
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func (c *Channel) Prepay(ctx context.Context, client string, req *pkgpay.PrepayRequest) (*pkgpay.PrepayResult, error) {
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if req == nil {
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return nil, fmt.Errorf("prepay request is required")
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}
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if client == "" {
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client = pkgpay.ClientMiniProgram
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}
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switch client {
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case pkgpay.ClientApp, pkgpay.ClientH5:
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return nil, pkgpay.ErrUnsupportedClient
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default:
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return c.miniProgramPrepay(ctx, req)
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}
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}
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func (c *Channel) miniProgramPrepay(ctx context.Context, req *pkgpay.PrepayRequest) (*pkgpay.PrepayResult, error) {
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currency := req.Currency
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if currency == "" {
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currency = "CNY"
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}
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result, err := c.client.MiniProgramPay(ctx, &wxpay.JsapiPrepayRequest{
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Description: req.Description,
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OutTradeNo: req.OutTradeNo,
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Attach: req.Attach,
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NotifyURL: req.NotifyURL,
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Amount: wxpay.Amount{
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Total: req.AmountFen,
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Currency: currency,
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},
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Payer: wxpay.Payer{OpenID: req.OpenID},
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})
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if err != nil {
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return nil, err
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}
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payload := map[string]any{}
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if result.Pay != nil {
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payload["timeStamp"] = result.Pay.TimeStamp
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payload["nonceStr"] = result.Pay.NonceStr
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payload["package"] = result.Pay.Package
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payload["signType"] = result.Pay.SignType
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payload["paySign"] = result.Pay.PaySign
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}
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return &pkgpay.PrepayResult{
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PrepayID: result.PrepayID,
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Payload: payload,
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}, nil
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}
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func (c *Channel) Refund(ctx context.Context, req *pkgpay.RefundRequest) (*pkgpay.RefundResult, error) {
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if req == nil {
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return nil, fmt.Errorf("refund request is required")
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}
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currency := req.Currency
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if currency == "" {
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currency = "CNY"
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}
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result, err := c.client.Refund(ctx, &wxpay.RefundRequest{
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OutTradeNo: req.OutTradeNo,
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TransactionID: req.TransactionID,
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OutRefundNo: req.OutRefundNo,
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Reason: req.Reason,
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NotifyURL: req.NotifyURL,
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Amount: wxpay.RefundAmount{
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Refund: req.RefundFen,
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Total: req.TotalFen,
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Currency: currency,
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},
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})
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if err != nil {
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return nil, err
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}
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return &pkgpay.RefundResult{
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RefundID: result.RefundID,
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OutRefundNo: result.OutRefundNo,
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TransactionID: result.TransactionID,
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OutTradeNo: result.OutTradeNo,
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Status: result.Status,
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}, nil
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}
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func (c *Channel) ParsePayNotify(_ context.Context, headers map[string]string, body []byte) (*pkgpay.NotifyResult, error) {
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httpReq, err := http.NewRequest(http.MethodPost, "/", bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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for k, v := range headers {
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httpReq.Header.Set(k, v)
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}
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notify, err := c.client.ParseNotify(httpReq)
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if err != nil {
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return nil, err
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}
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if notify.EventType != "TRANSACTION.SUCCESS" {
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return &pkgpay.NotifyResult{Success: false, TradeState: notify.EventType}, nil
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}
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tx, err := c.client.DecryptNotify(notify)
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if err != nil {
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return nil, err
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}
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return &pkgpay.NotifyResult{
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OutTradeNo: tx.OutTradeNo,
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TransactionID: tx.TransactionID,
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TradeState: tx.TradeState,
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AmountFen: tx.Amount.Total,
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Success: tx.TradeState == "SUCCESS",
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Attach: tx.Attach,
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}, nil
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}
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