Appendix 4: Error codes
### Appendix 4: Error Codes
| Error Code | Error Message
|-|-
| NOUSER | Username does not exist.
| BADNAME | The username does not comply to the rules that the format must be 2~16 characters long including a mix of numbers + letters + underscores.
| BADPASSWORD | The password does not comply with the rules that the password length must be 5~16 characters in length.
| EXISTSUSER | Username already exists.
BADMONEY | The amount is incorrect. The amount is available to two decimal places.
BANORDER | Wrong order number (does not comply with the rules or does not exist.)
EXISTSORDER | The Order number already exists and is the unique one to transaction.
TRANSFER_NO_ACTION | No transfer action specified, transfer action must be IN or OUT.
| IP | IP Unauthorized
| USERLOCK | User is locked and login is prohibited
| NOBALANCE | Insufficient balance
| NOCREDIT | Insufficient platform quota (applicable to buying merchants)
| Authorization | API key error
| Faild | An error occurred
| DOMAIN | Do not configure domain name (please contact customer service)
| CONTENT | Content error (the submitted parameters do not meet the rules)
| Sign | Signing error (applicable to single wallet communication error prompt)
| NOSUPPORT | The operation is not supported
| TIMEOUT | Timeout request
| EXISTSUSERNAME | Username already exists
| STATUS | status error (the merchant is frozen)
| CONFIGERROR | Business information configuration error (please contact customer service to deal with)
| DATEEROOR | The query date is wrong, the date exceeds 1 day or the end time is greater than the start time
| ORDER_NOTFOUND | The order number used in the query does not exist