PoolId


type PoolId is bytes32;

The PoolId is a unique identifier for a pool. It is a 32-byte hash of the PoolKey. You can compute the PoolId from the pool key using the PoolIdLibrary library function toId.


/// @notice Library for computing the ID of a pool
library PoolIdLibrary {
    /// @notice Returns value equal to keccak256(abi.encode(poolKey))
    function toId(PoolKey memory poolKey) internal pure returns (PoolId poolId) {
        assembly ("memory-safe") {
            // 0xa0 represents the total size of the poolKey struct (5 slots of 32 bytes)
            poolId := keccak256(poolKey, 0xa0)
        }
    }
}

Example:


using PoolIdLibrary for PoolKey;
 
PoolKey memory poolKey = PoolKey({
    currency0: Currency.wrap(someAddress0),
    currency1: Currency.wrap(someAddress1),
    fee: someFee,
    tickSpacing: someTickSpacing,
    hooks: someHookContractAddress
});
 
PoolId poolId = poolKey.toId(); // This will be a 32-byte hash of the pool key