# Router

The following table outlines potential errors that may occur during interactions with the router contract in GnoSwap:

| Code               | Error                                | Description                                                                                                               |
| ------------------ | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------- |
| GNOSWAP-ROUTER-001 | Slippage check failed                | Occurs when the execution price deviates beyond the user's specified slippage tolerance, causing the transaction to fail. |
| GNOSWAP-ROUTER-002 | Invalid routes and quotes            | Occurs when requested routes and quote does not match length.                                                             |
| GNOSWAP-ROUTER-003 | Transaction expired                  | Occurs when transaction failed due to expiration.                                                                         |
| GNOSWAP-ROUTER-004 | Invalid input data                   | Occurs when input data does not match the expected format or parameters, making the operation invalid.                    |
| GNOSWAP-ROUTER-005 | Invalid pool fee tier                | Occurs when the pool fee tier specified in the transaction is not valid for pool.                                         |
| GNOSWAP-ROUTER-006 | Invalid swap fee                     | Occurs when the swap fee specified in the transaction is not valid for the operation or pool.                             |
| GNOSWAP-ROUTER-007 | Invalid swap type                    | Occurs when an unsupported or incorrect swap type is specified, causing the transaction to fail.                          |
| GNOSWAP-ROUTER-008 | Invalid pool path                    | Occurs when an invalid or non-existent pool path is referenced in the transaction.                                        |
| GNOSWAP-ROUTER-009 | Cannot wrap less than minimum amount | Occurs when the amount provided for an operation is below the minimum allowed for wugnot tokens.                          |
| GNOSWAP-ROUTER-010 | Number of hops must be 1\~3          | Occurs when single path has unsupported number of hops.                                                                   |
| GNOSWAP-ROUTER-011 | Cannot swap same token               | Occurs when an attempt is made to swap the same token as input and output.                                                |
| GNOSWAP-ROUTER-012 | Overflow                             | Occurs when mathematical results overflow numeric range.                                                                  |
| GNOSWAP-ROUTER-013 | Invalid route path                   | Occurs when the route path is invalid or malformed.                                                                       |
| GNOSWAP-ROUTER-014 | Invalid route first token            | Occurs when the first token in the route does not match expected input token.                                             |
| GNOSWAP-ROUTER-015 | Invalid route last token             | Occurs when the last token in the route does not match expected output token.                                             |
| GNOSWAP-ROUTER-016 | Invalid swap amount                  | Occurs when the swap amount is invalid or out of acceptable range.                                                        |
| GNOSWAP-ROUTER-017 | Unauthorized caller                  | Occurs when the caller does not have permission to execute the operation.                                                 |