| Response Code | Description |
|---|---|
| 0 | OK |
| -1 | Failed |
| -01 | Pending Refund (applicable to WeChat) |
| -1001 | [string] must be sent. it is a mandatory field |
| -1002 | account is not found for mid : [string] |
| -1003 | invalid signature |
| -1004 | [string] cannot be empty. it is a mandatory field |
| -1005 | cannot find request for mid : [string] with transaction-id: [string] |
| -1006 | cannot find history for mid : [string] with transaction-id: [string] |
| -2001 | unexpected error |
| -2002 | CURL error |