# Error Codes

BlockATM API complete error code reference.

## System Errors (000xxx)

| code   | Description                             |
| ------ | --------------------------------------- |
| 000101 | System error                            |
| 000102 | Parameter type error                    |
| 000103 | Missing required parameter              |
| 000104 | Object cannot be empty                  |
| 000105 | Invalid request                         |
| 000106 | Duplicate request                       |
| 000107 | System busy                             |
| 000108 | Token required                          |
| 000109 | Session expired                         |
| 000110 | No access permission                    |
| 000112 | API Key required                        |
| 000113 | Service unavailable, please retry later |
| 000114 | Service under maintenance               |

## Business Errors (0002xx)

| code   | Description                  |
| ------ | ---------------------------- |
| 000201 | Data already exists          |
| 000202 | Data does not exist          |
| 000203 | Data unchanged               |
| 000204 | Invalid status               |
| 000205 | Service request failed       |
| 000206 | Field exceeds maximum length |
| 000207 | Field below minimum length   |
| 000208 | Unsupported file format      |

## Payment Errors (0003xx)

| code   | Description                   |
| ------ | ----------------------------- |
| 000301 | Order already paid            |
| 000302 | Order cancelled               |
| 000303 | Order expired                 |
| 000304 | Order amount mismatch         |
| 000305 | Payment method unavailable    |
| 000306 | Signature verification failed |
| 000307 | Insufficient balance          |
| 000308 | Insufficient authorization    |

## Contract Errors (0004xx)

| code   | Description                        |
| ------ | ---------------------------------- |
| 000401 | Contract does not exist            |
| 000402 | Invalid contract address           |
| 000403 | Insufficient contract balance      |
| 000404 | Unsupported token                  |
| 000405 | Recipient address not in whitelist |

## Handling Suggestions

| Error Type    | Suggested Handling                 |
| ------------- | ---------------------------------- |
| 000101/000107 | System error, wait and retry       |
| 000103/000105 | Check request parameters           |
| 000202        | Check if order/contract exists     |
| 000303        | Order expired, recreate            |
| 000306        | Check if signature is correct      |
| 000307/000308 | Recharge or increase authorization |


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