refactor(store): add StoreWrite and Store abstract contracts (#2411)

Co-authored-by: alvrs <alvarius@lattice.xyz>
Co-authored-by: Kevin Ingersoll <kingersoll@gmail.com>

.changeset/silly-mirrors-marry.md

@@ -0,0 +1,6 @@
+---
+"@latticexyz/store": minor
+"@latticexyz/world": patch
+---
+
+Added an `abstract` `StoreKernel` contract, which includes all Store interfaces except for registration, and implements write methods, `protocolVersion` and initializes `StoreCore`. `Store` extends `StoreKernel` with the `IStoreRegistration` interface. `StoreData` is removed as a separate interface/contract. `World` now extends `StoreKernel` (since the registration methods are added via the `InitModule`).

docs/pages/store/reference/store-core.mdx

@@ -1015,44 +1015,18 @@ function _loadEncodedDynamicDataLength(
 | -------- | ---------------- | ----------------------------------------------------------------------------------------- |
 | `<none>` | `EncodedLengths` | The loaded encoded dynamic data length from storage for the given table ID and key tuple. |
 
-## StoreData
+## Store
 
-[Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/StoreData.sol)
+[Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/Store.sol)
 
 **Inherits:**
-[IStoreData](/store/reference/store#istoredata), [StoreRead](/store/reference/store-core#storeread)
+[IStore](/src/IStore.sol/interface.IStore.md), [StoreKernel](/src/StoreKernel.sol/abstract.StoreKernel.md)
 
 This contract integrates the core storage functionalities and provides an interface for data storage.
 
 _This abstract contract initializes `StoreCore`, implements `storeVersion`, and read methods,
 but not write methods._
 
-### Functions
-
-#### constructor
-
-Constructs the StoreData contract and initializes the StoreCore.
-
-_Emits a HelloStore event upon creation._
-
-```solidity
-constructor();
-```
-
-#### storeVersion
-
-Retrieves the protocol version of the Store.
-
-```solidity
-function storeVersion() public pure returns (bytes32);
-```
-
-**Returns**
-
-| Name     | Type      | Description                        |
-| -------- | --------- | ---------------------------------- |
-| `<none>` | `bytes32` | The protocol version of the Store. |
-
 ## StoreRead
 
 [Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/StoreRead.sol)

docs/pages/store/reference/store.mdx

@@ -5,9 +5,7 @@
 [Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/IStore.sol)
 
 **Inherits:**
-[IStoreData](/store/reference/store#istoredata), [IStoreRegistration](/store/reference/store#istoreregistration), [IStoreErrors](/store/reference/store#istoreerrors), [IFieldLayoutErrors](/src/IFieldLayoutErrors.sol/interface.IFieldLayoutErrors.md), [IEncodedLengthsErrors](/src/IEncodedLengthsErrors.sol/interface.IEncodedLengthsErrors.md), [ISchemaErrors](/src/ISchemaErrors.sol/interface.ISchemaErrors.md), [ISliceErrors](/src/ISliceErrors.sol/interface.ISliceErrors.md)
-
-IStore implements the error interfaces for each library that it uses.
+[IStoreKernel](/src/IStoreKernel.sol/interface.IStoreKernel.md), [IStoreRegistration](/store/reference/store#istoreregistration)
 
 ## IStoreEvents
 
@@ -313,33 +311,6 @@ error Store_InvalidSplice(uint40 startWithinField, uint40 deleteCount, uint40 fi
 | `deleteCount`      | `uint40` | The number of bytes to delete in the splice operation.     |
 | `fieldLength`      | `uint40` | The field length for the splice operation.                 |
 
-## IStoreData
-
-[Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/IStoreData.sol)
-
-**Inherits:**
-[IStoreRead](/store/reference/store#istoreread), [IStoreWrite](/store/reference/store#istorewrite)
-
-The IStoreData interface includes methods for reading and writing table values.
-
-_These methods are frequently invoked during runtime, so it is essential to prioritize optimizing their gas cost._
-
-### Functions
-
-#### storeVersion
-
-Returns the version of the Store contract.
-
-```solidity
-function storeVersion() external view returns (bytes32 version);
-```
-
-**Returns**
-
-| Name      | Type      | Description                        |
-| --------- | --------- | ---------------------------------- |
-| `version` | `bytes32` | The version of the Store contract. |
-
 ## IStoreRead
 
 [Git Source](https://github.com/latticexyz/mud/blob/main/packages/store/src/IStoreRead.sol)

docs/pages/world/reference/world-external.mdx

@@ -12,21 +12,17 @@ that are dynamically registered in the World during deployment.
 
 _._
 
-### Functions
-
-#### storeVersion
+## Store
 
-Retrieves the protocol version of the Store.
+[Git Source](https://github.com/latticexyz/mud/blob/main/packages/world/src/Store.sol)
 
-```solidity
-function storeVersion() public pure returns (bytes32);
-```
+**Inherits:**
+[IStore](/src/IStore.sol/interface.IStore.md), [StoreKernel](/src/StoreKernel.sol/abstract.StoreKernel.md)
 
-**Returns**
+This contract integrates the core storage functionalities and provides an interface for data storage.
 
-| Name     | Type      | Description                        |
-| -------- | --------- | ---------------------------------- |
-| `<none>` | `bytes32` | The protocol version of the Store. |
+_This abstract contract initializes `StoreCore`, implements `storeVersion`, and read methods,
+but not write methods._
 
 #### registerTable
 

docs/pages/world/reference/world.mdx

@@ -5,11 +5,13 @@
 [Git Source](https://github.com/latticexyz/mud/blob/main/packages/world/src/World.sol)
 
 **Inherits:**
-[StoreData](/store/reference/store-core#storedata), [IWorldKernel](/world/reference/world-external#iworldkernel)
+StoreKernel, [IWorldKernel](/world/reference/world-external#iworldkernel)
 
 _This contract is the core "World" contract containing various methods for
 data manipulation, system calls, and dynamic function selector handling._
 
+_World doesn't inherit `Store` because the `IStoreRegistration` methods are added via the `InitModule`._
+
 ### State Variables
 
 #### creator

packages/store/src/IStore.sol

@@ -1,25 +1,11 @@
 // SPDX-License-Identifier: MIT
 pragma solidity >=0.8.24;
 
-import { IStoreErrors } from "./IStoreErrors.sol";
-import { IStoreData } from "./IStoreData.sol";
+import { IStoreKernel } from "./IStoreKernel.sol";
 import { IStoreRegistration } from "./IStoreRegistration.sol";
-import { IFieldLayoutErrors } from "./IFieldLayoutErrors.sol";
-import { IEncodedLengthsErrors } from "./IEncodedLengthsErrors.sol";
-import { ISchemaErrors } from "./ISchemaErrors.sol";
-import { ISliceErrors } from "./ISliceErrors.sol";
 
 /**
  * @title IStore
  * @author MUD (https://mud.dev) by Lattice (https://lattice.xyz)
- * @notice IStore implements the error interfaces for each library that it uses.
  */
-interface IStore is
-  IStoreData,
-  IStoreRegistration,
-  IStoreErrors,
-  IFieldLayoutErrors,
-  IEncodedLengthsErrors,
-  ISchemaErrors,
-  ISliceErrors
-{}
+interface IStore is IStoreKernel, IStoreRegistration {}

packages/store/src/IStoreKernel.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8.24;
+
+import { IStoreRead } from "./IStoreRead.sol";
+import { IStoreWrite } from "./IStoreWrite.sol";
+import { IStoreErrors } from "./IStoreErrors.sol";
+import { IFieldLayoutErrors } from "./IFieldLayoutErrors.sol";
+import { IEncodedLengthsErrors } from "./IEncodedLengthsErrors.sol";
+import { ISchemaErrors } from "./ISchemaErrors.sol";
+import { ISliceErrors } from "./ISliceErrors.sol";
+
+/**
+ * @title IStoreKernel
+ * @author MUD (https://mud.dev) by Lattice (https://lattice.xyz)
+ * @notice IStoreKernel includes the error interfaces for each library that it uses.
+ */
+interface IStoreKernel is
+  IStoreRead,
+  IStoreWrite,
+  IStoreErrors,
+  IFieldLayoutErrors,
+  IEncodedLengthsErrors,
+  ISchemaErrors,
+  ISliceErrors
+{
+  /**
+   * @notice Returns the protocol version of the Store contract.
+   * @return version The protocol version of the Store contract.
+   */
+  function storeVersion() external view returns (bytes32 version);
+}

packages/store/src/Store.sol

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8.24;
+
+import { STORE_VERSION } from "./version.sol";
+import { IStore } from "./IStore.sol";
+import { StoreKernel } from "./StoreKernel.sol";
+import { StoreRead } from "./StoreRead.sol";
+import { StoreCore } from "./StoreCore.sol";
+import { IStoreEvents } from "./IStoreEvents.sol";
+
+/**
+ * @title Store Contract
+ * @author MUD (https://mud.dev) by Lattice (https://lattice.xyz)
+ * @notice This contract integrates the core storage functionalities and provides an interface for data storage.
+ * @dev This abstract contract initializes `StoreCore`, implements `storeVersion`, and read methods,
+ * but not write methods.
+ */
+abstract contract Store is IStore, StoreKernel {}

packages/store/src/StoreData.sol → packages/store/src/StoreKernel.sol

@@ -2,21 +2,21 @@
 pragma solidity >=0.8.24;
 
 import { STORE_VERSION } from "./version.sol";
-import { IStoreData } from "./IStoreData.sol";
+import { IStore } from "./IStore.sol";
 import { StoreRead } from "./StoreRead.sol";
 import { StoreCore } from "./StoreCore.sol";
 import { IStoreEvents } from "./IStoreEvents.sol";
+import { IStoreKernel } from "./IStoreKernel.sol";
 
 /**
- * @title Store Data Contract
+ * @title StoreKernel Contract
  * @author MUD (https://mud.dev) by Lattice (https://lattice.xyz)
- * @notice This contract integrates the core storage functionalities and provides an interface for data storage.
- * @dev This abstract contract initializes `StoreCore`, implements `storeVersion`, and read methods,
- * but not write methods.
+ * @notice This contract integrates the storage functionalities except registration and provides an interface for data storage.
+ * @dev This abstract contract initializes `StoreCore`, implements `storeVersion`, and read methods.
  */
-abstract contract StoreData is IStoreData, StoreRead {
+abstract contract StoreKernel is IStoreKernel, StoreRead {
   /**
-   * @notice Constructs the StoreData contract and initializes the StoreCore.
+   * @notice Constructs the StoreKernel contract and initializes the StoreCore.
    * @dev Emits a HelloStore event upon creation.
    */
   constructor() {