pool package

GetObservationAt returns a safe copy of the observation stored at index. An in-range but uninitialized slot returns the zero observation, matching Uniswap V3's fixed observation-array getter.

ref: uniswap v3 IUniswapV3PoolState.observations(uint256 index) Parameters:

• poolPath: Canonical pool path identifying the pool containing the observation.
• index: Zero-based observation-array index; values at or above the fixed cardinality bound return an error.

Returns:

• Observation: Observation at index, or the zero observation when the slot is in range but has never been written.
• error: Non-nil when the pool is missing or index is out of range.