CREATE2 callback validation; init code storage contracts

src/IPartyPlanner.sol

@@ -2,10 +2,10 @@
 pragma solidity ^0.8.30;
 
 import {IERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
-
-import "./IPartyPool.sol";
-import "./PartyPoolMintImpl.sol";
-import "./PartyPoolSwapImpl.sol";
+import {IOwnable} from "./IOwnable.sol";
+import {IPartyPool} from "./IPartyPool.sol";
+import {PartyPoolMintImpl} from "./PartyPoolMintImpl.sol";
+import {PartyPoolSwapImpl} from "./PartyPoolSwapImpl.sol";
 
 /// @title IPartyPlanner
 /// @notice Interface for factory contract for creating and tracking PartyPool instances
@@ -13,6 +13,38 @@ interface IPartyPlanner is IOwnable {
     // Event emitted when a new pool is created
     event PartyStarted(IPartyPool indexed pool, string name, string symbol, IERC20[] tokens);
 
+
+    /// @notice Primary method for creating a new pool. May only be called by the PartyPlanner owner account.
+    /// @param name LP token name
+    /// @param symbol LP token symbol
+    /// @param tokens token addresses
+    /// @param kappa liquidity parameter κ in 64.64 fixed-point used to derive b = κ * S(q)
+    /// @param swapFeesPpm per-asset fees in parts-per-million, taken from swap input amounts before LMSR calculations
+    /// @param flashFeePpm fee in parts-per-million, taken for flash loans
+    /// @param stable if true and assets.length==2, then the optimization for 2-asset stablecoin pools is activated
+    /// @param payer address that provides the initial token deposits
+    /// @param receiver address that receives the minted LP tokens
+    /// @param initialDeposits amounts of each token to deposit initially
+    /// @param deadline Reverts if nonzero and the current blocktime is later than the deadline
+    /// @return pool Address of the newly created and initialized PartyPool
+    /// @return lpAmount Amount of LP tokens minted to the receiver
+    function newPool(
+        // Pool constructor args
+        string memory name,
+        string memory symbol,
+        IERC20[] memory tokens,
+        int128 kappa,
+        uint256[] memory swapFeesPpm,
+        uint256 flashFeePpm,
+        bool stable,
+        // Initial deposit information
+        address payer,
+        address receiver,
+        uint256[] memory initialDeposits,
+        uint256 initialLpAmount,
+        uint256 deadline
+    ) external returns (IPartyPool pool, uint256 lpAmount);
+
     /// @notice Creates a new PartyPool instance and initializes it with initial deposits (legacy signature).
     /// @dev Deprecated in favour of the kappa-based overload below; kept for backwards compatibility.
     /// @param name LP token name