# Pool

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

| Code             | Error                                           | Description                                                                                                                          |
| ---------------- | ----------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| GNOSWAP-POOL-001 | Unsupported fee tier                            | Occurs when an unsupported fee tier is specified for pool operations.                                                                |
| GNOSWAP-POOL-002 | Pool already created                            | Occurs when there is an attempt to create a pool that already exists with the same token pair and fee tier.                          |
| GNOSWAP-POOL-003 | Out of range for numeric value                  | Occurs when a numeric input exceeds the allowed range for liquidity or token amounts.                                                |
| GNOSWAP-POOL-004 | Invalid input data                              | Occurs when input data does not meet the expected format or parameters, making the operation invalid.                                |
| GNOSWAP-POOL-005 | Requested data not found                        | Occurs when the system is unable to locate the requested data for the operation, such as a specific pool or liquidity position.      |
| GNOSWAP-POOL-006 | Invalid liquidity calculated                    | Occurs when the calculated liquidity value is incorrect, possibly due to invalid inputs or calculation errors.                       |
| GNOSWAP-POOL-007 | Zero liquidity                                  | Occurs when an operation that requires positive liquidity is attempted with zero liquidity.                                          |
| GNOSWAP-POOL-008 | Same token used in single pool                  | Occurs when the same token is used twice in a single pool, which is invalid in a pool configuration.                                 |
| GNOSWAP-POOL-009 | TickLower is invalid                            | Occurs when request tickLower does not match to the tickSpacing.                                                                     |
| GNOSWAP-POOL-010 | TickUpper is invalid                            | Occurs when request tickUpper does not match to the tickSpacing.                                                                     |
| GNOSWAP-POOL-011 | Invalid swap amount                             | Occurs when the swap amount provided is invalid, such as a negative value or an amount that exceeds available liquidity.             |
| GNOSWAP-POOL-012 | Invalid protocol fee percentage                 | Occurs when an invalid protocol fee percentage is provided, such as a value outside the acceptable range.                            |
| GNOSWAP-POOL-013 | Invalid withdrawal fee percentage               | Occurs when the withdrawal fee percentage is outside the allowed range or is otherwise invalid.                                      |
| GNOSWAP-POOL-014 | Cannot swap while pool is locked                | Occurs when a user attempts to perform a swap operation while the pool is locked, making swaps temporarily unavailable.              |
| GNOSWAP-POOL-015 | Swap price out of range                         | Occurs when the specified swap price falls outside the acceptable range defined by the pool's parameters.                            |
| GNOSWAP-POOL-016 | Token transfer failed                           | Occurs when a token transfer fails due to issues such as insufficient gas, network issues, or restrictions on the token itself.      |
| GNOSWAP-POOL-017 | Invalid tick and tick spacing requested         | Occurs when an invalid tick value or tick spacing is provided, which does not align with the pool's tick configuration requirements. |
| GNOSWAP-POOL-018 | TickLower is greater than or equal to tickUpper | Occurs when tickLower is equal or greater than tickUpper while it should be always less.                                             |
| GNOSWAP-POOL-019 | Underflow                                       | Occurs when mathematical results underflow numeric range.                                                                            |
| GNOSWAP-POOL-020 | Overflow                                        | Occurs when mathematical results overflow numeric range.                                                                             |
| GNOSWAP-POOL-021 | Balance update failed                           | Occurs when token transfer succeeds, but pool's balance did not update.                                                              |
| GNOSWAP-POOL-022 | Invalid payer                                   | Occurs when the payer address is invalid or unauthorized.                                                                            |
| GNOSWAP-POOL-023 | Not access EOA                                  | Occurs when the caller is not an externally owned account (EOA).                                                                     |
| GNOSWAP-POOL-024 | Insufficient payment                            | Occurs when the payment amount is insufficient for the operation.                                                                    |
| GNOSWAP-POOL-025 | Not initialized observation                     | Occurs when an observation has not been initialized.                                                                                 |
| GNOSWAP-POOL-026 | Target timestamp before oldest observation      | Occurs when the target timestamp is before the oldest available observation.                                                         |