Checkout
Walk-in or member → add items → pay.
Payment methods
| Method | Notes |
|---|---|
| Cash | Counted at day close |
| Scan / auth-code; configure mch credentials; don’t mix sandbox | |
| Alipay | Per integration |
| Bank card | Terminal / UnionPay style |
| Member balance | Fails if insufficient |
| Groupon | Meituan/Douyin write-off — see Orders |
Business 4xx (stock, balance) never go offline queue — fix and retry. Network/5xx may queue — verify duplicates after reconnect.