> For the complete documentation index, see [llms.txt](https://node1.gitbook.io/node1-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://node1.gitbook.io/node1-docs/solana/fast-landing/error-codes.md).

# Error codes

## Reference

| Code | Description                              |
| ---- | ---------------------------------------- |
| 401  | Unauthorized. Missing or invalid api-key |
| 429  | Too Many Requests. Rate limit exceeded   |
| 601  | Invalid body                             |
| 602  | Params not found in json body            |
| 603  | Transaction not found                    |
| 604  | Base64 transaction type error            |
| 605  | Decode base64 transaction error          |
| 606  | Tip Instruction not found                |
| 607  | Tip amount insufficient                  |

## Important

1. Ensure the transaction includes at least one **tip transfer instruction**, otherwise validation will fail.
2. Transactions must be correctly encoded in **Base64 format**.
3. Ensure the wallet has **sufficient funds**.
4. Once submitted and confirmed, transactions **cannot be reversed**.


---

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