Integration with Solday's ERC6551 Implementation

contracts/IPAccountImpl.sol

@@ -2,12 +2,12 @@
 pragma solidity 0.8.23;
 
 import { IERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
-import { IERC721 } from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
 import { IERC721Receiver } from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
 import { IERC1155Receiver } from "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
 import { SignatureChecker } from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";
 import { MessageHashUtils } from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
 import { IERC6551Account } from "erc6551/interfaces/IERC6551Account.sol";
+import { ERC6551, Receiver } from "@solady/src/accounts/ERC6551.sol";
 
 import { IAccessController } from "./interfaces/access/IAccessController.sol";
 import { IIPAccount } from "./interfaces/IIPAccount.sol";
@@ -17,13 +17,10 @@ import { IPAccountStorage } from "./IPAccountStorage.sol";
 
 /// @title IPAccountImpl
 /// @notice The Story Protocol's implementation of the IPAccount.
-contract IPAccountImpl is IPAccountStorage, IIPAccount {
+contract IPAccountImpl is ERC6551, IPAccountStorage, IIPAccount {
     address public immutable ACCESS_CONTROLLER;
 
-    /// @notice Returns the IPAccount's internal nonce for transaction ordering.
-    uint256 public state;
-
-    receive() external payable override(IERC6551Account) {}
+    receive() external payable override(Receiver, IIPAccount) {}
 
     /// @notice Creates a new IPAccountImpl contract instance
     /// @dev Initializes the IPAccountImpl with an AccessController address which is stored
@@ -44,7 +41,9 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
     /// @notice Checks if the contract supports a specific interface
     /// @param interfaceId The interface identifier, as specified in ERC-165
     /// @return bool is true if the contract supports the interface, false otherwise
-    function supportsInterface(bytes4 interfaceId) public view override(IPAccountStorage, IERC165) returns (bool) {
+    function supportsInterface(
+        bytes4 interfaceId
+    ) public view override(ERC6551, IPAccountStorage, IERC165) returns (bool) {
         return (interfaceId == type(IIPAccount).interfaceId ||
             interfaceId == type(IERC6551Account).interfaceId ||
             interfaceId == type(IERC1155Receiver).interfaceId ||
@@ -56,42 +55,30 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
     /// @return chainId The EIP-155 ID of the chain the token exists on
     /// @return tokenContract The contract address of the token
     /// @return tokenId The ID of the token
-    function token() public view override returns (uint256, address, uint256) {
-        bytes memory footer = new bytes(0x60);
-        // 0x4d = 77 bytes (ERC-1167 Header, address, ERC-1167 Footer, salt)
-        // 0x60 = 96 bytes (chainId, tokenContract, tokenId)
-        //    ERC-1167 Header               (10 bytes)
-        //    <implementation (address)>    (20 bytes)
-        //    ERC-1167 Footer               (15 bytes)
-        //    <salt (uint256)>              (32 bytes)
-        //    <chainId (uint256)>           (32 bytes)
-        //    <tokenContract (address)>     (32 bytes)
-        //    <tokenId (uint256)>           (32 bytes)
-        assembly {
-            extcodecopy(address(), add(footer, 0x20), 0x4d, 0x60)
-        }
-
-        return abi.decode(footer, (uint256, address, uint256));
+    function token() public view override(ERC6551, IIPAccount) returns (uint256, address, uint256) {
+        return super.token();
     }
 
     /// @notice Checks if the signer is valid for the given data
     /// @param signer The signer to check
     /// @param data The data to check against
     /// @return The function selector if the signer is valid, 0 otherwise
-    function isValidSigner(address signer, bytes calldata data) external view returns (bytes4) {
-        if (_isValidSigner(signer, address(0), data)) {
-            return IERC6551Account.isValidSigner.selector;
-        }
-
-        return bytes4(0);
+    function isValidSigner(
+        address signer,
+        bytes calldata data
+    ) public view override(ERC6551, IIPAccount) returns (bytes4) {
+        return super.isValidSigner(signer, data);
     }
 
     /// @notice Returns the owner of the IP Account.
     /// @return The address of the owner.
-    function owner() public view returns (address) {
-        (uint256 chainId, address contractAddress, uint256 tokenId) = token();
-        if (chainId != block.chainid) return address(0);
-        return IERC721(contractAddress).ownerOf(tokenId);
+    function owner() public view override(ERC6551, IIPAccount) returns (address) {
+        return super.owner();
+    }
+
+    /// @notice Returns the IPAccount's internal nonce for transaction ordering.
+    function state() public view override(ERC6551, IIPAccount) returns (bytes32 result) {
+        return super.state();
     }
 
     /// @dev Checks if the signer is valid for the given data and recipient via the AccessController permission system.
@@ -135,12 +122,12 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
             revert Errors.IPAccount__ExpiredSignature();
         }
 
-        ++state;
+        _updateStateForExecute(to, value, data);
 
         bytes32 digest = MessageHashUtils.toTypedDataHash(
             MetaTx.calculateDomainSeparator(),
             MetaTx.getExecuteStructHash(
-                MetaTx.Execute({ to: to, value: value, data: data, nonce: state, deadline: deadline })
+                MetaTx.Execute({ to: to, value: value, data: data, nonce: state(), deadline: deadline })
             )
         );
 
@@ -149,7 +136,7 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
         }
 
         result = _execute(signer, to, value, data);
-        emit ExecutedWithSig(to, value, data, state, deadline, signer, signature);
+        emit ExecutedWithSig(to, value, data, state(), deadline, signer, signature);
     }
 
     /// @notice Executes a transaction from the IP Account.
@@ -158,30 +145,45 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
     /// @param data The data to send along with the transaction.
     /// @return result The return data from the transaction.
     function execute(address to, uint256 value, bytes calldata data) external payable returns (bytes memory result) {
-        ++state;
+        _updateStateForExecute(to, value, data);
         result = _execute(msg.sender, to, value, data);
-        emit Executed(to, value, data, state);
+        emit Executed(to, value, data, state());
     }
 
-    /// @inheritdoc IERC721Receiver
-    function onERC721Received(address, address, uint256, bytes memory) public pure returns (bytes4) {
-        return this.onERC721Received.selector;
-    }
-
-    /// @inheritdoc IERC1155Receiver
-    function onERC1155Received(address, address, uint256, uint256, bytes memory) public pure returns (bytes4) {
-        return this.onERC1155Received.selector;
+    /// @dev Override 6551 execute function.
+    /// Only "CALL" operation is supported.
+    /// @param to The recipient of the transaction.
+    /// @param value The amount of Ether to send.
+    /// @param data The data to send along with the transaction.
+    /// @param operation The operation type to perform, only 0 - CALL is supported.
+    /// @return result The return data from the transaction.
+    function execute(
+        address to,
+        uint256 value,
+        bytes calldata data,
+        uint8 operation
+    ) public payable override returns (bytes memory result) {
+        // Only "CALL" operation is supported.
+        if (operation != 0) {
+            revert Errors.IPAccount__InvalidOperation();
+        }
+        _updateStateForExecute(to, value, data);
+        result = _execute(msg.sender, to, value, data);
+        emit Executed(to, value, data, state());
     }
 
-    /// @inheritdoc IERC1155Receiver
-    function onERC1155BatchReceived(
-        address,
-        address,
-        uint256[] memory,
-        uint256[] memory,
-        bytes memory
-    ) public pure returns (bytes4) {
-        return this.onERC1155BatchReceived.selector;
+    /// @notice Executes a batch of transactions from the IP Account.
+    /// @param calls The array of calls to execute.
+    /// @param operation The operation type to perform, only 0 - CALL is supported.
+    /// @return results The return data from the transactions.
+    function executeBatch(
+        Call[] calldata calls,
+        uint8 operation
+    ) public payable override returns (bytes[] memory results) {
+        results = new bytes[](calls.length);
+        for (uint256 i = 0; i < calls.length; i++) {
+            results[i] = execute(calls[i].target, calls[i].value, calls[i].data, operation);
+        }
     }
 
     /// @dev Executes a transaction from the IP Account.
@@ -202,4 +204,36 @@ contract IPAccountImpl is IPAccountStorage, IIPAccount {
             }
         }
     }
+
+    /// @dev Updates the IP Account's state all execute transactions.
+    /// @param to The "target" of the execute transactions.
+    /// @param value The amount of Ether to send.
+    /// @param data The data to send along with the transaction.
+    function _updateStateForExecute(address to, uint256 value, bytes calldata data) internal {
+        bytes32 newState = keccak256(
+            abi.encode(state(), abi.encodeWithSignature("execute(address,uint256,bytes)", to, value, data))
+        );
+        assembly {
+            sstore(_ERC6551_STATE_SLOT, newState)
+        }
+    }
+
+    /// @dev Override Solady 6551 _isValidSigner function.
+    /// @param signer The signer to check
+    /// @param extraData The extra data to check against, it should bethe address of the recipient for IPAccount
+    /// @param context The context for validating the signer
+    /// @return bool is true if the signer is valid, false otherwise
+    function _isValidSigner(
+        address signer,
+        bytes32 extraData,
+        bytes calldata context
+    ) internal view override returns (bool) {
+        return _isValidSigner(signer, address(uint160(uint256(extraData))), context);
+    }
+
+    /// @dev Override Solady EIP712 function and return EIP712 domain name for IPAccount.
+    function _domainNameAndVersion() internal view override returns (string memory name, string memory version) {
+        name = "Story Protocol IP Account";
+        version = "1";
+    }
 }

contracts/IPAccountStorage.sol

@@ -4,7 +4,7 @@ pragma solidity ^0.8.23;
 import { IIPAccountStorage } from "./interfaces/IIPAccountStorage.sol";
 import { IModuleRegistry } from "./interfaces/registries/IModuleRegistry.sol";
 import { Errors } from "./lib/Errors.sol";
-import { ERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
+import { ERC165, IERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
 import { ShortString, ShortStrings } from "@openzeppelin/contracts/utils/ShortStrings.sol";
 /// @title IPAccount Storage
 /// @dev Implements the IIPAccountStorage interface for managing IPAccount's state using a namespaced storage pattern.
@@ -66,7 +66,7 @@ contract IPAccountStorage is ERC165, IIPAccountStorage {
     }
 
     /// @notice ERC165 interface identifier for IIPAccountStorage
-    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165) returns (bool) {
+    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
         return interfaceId == type(IIPAccountStorage).interfaceId || super.supportsInterface(interfaceId);
     }
 

contracts/interfaces/IIPAccount.sol

@@ -1,9 +1,6 @@
 // SPDX-License-Identifier: BUSL-1.1
 pragma solidity 0.8.23;
 
-import { IERC721Receiver } from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
-import { IERC1155Receiver } from "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
-import { IERC6551Account } from "erc6551/interfaces/IERC6551Account.sol";
 import { IIPAccountStorage } from "./IIPAccountStorage.sol";
 
 /// @title IIPAccount
@@ -14,13 +11,13 @@ import { IIPAccountStorage } from "./IIPAccountStorage.sol";
 /// IPAccount can interact with modules by making calls as a normal transaction sender.
 /// This allows for seamless operations on the state and data of IP.
 /// IPAccount is core identity for all actions.
-interface IIPAccount is IERC6551Account, IERC721Receiver, IERC1155Receiver, IIPAccountStorage {
+interface IIPAccount is IIPAccountStorage {
     /// @notice Emitted when a transaction is executed.
     /// @param to The recipient of the transaction.
     /// @param value The amount of Ether sent.
     /// @param data The data sent along with the transaction.
     /// @param nonce The nonce of the transaction.
-    event Executed(address indexed to, uint256 value, bytes data, uint256 nonce);
+    event Executed(address indexed to, uint256 value, bytes data, bytes32 nonce);
 
     /// @notice Emitted when a transaction is executed on behalf of the signer.
     /// @param to The recipient of the transaction.
@@ -34,14 +31,16 @@ interface IIPAccount is IERC6551Account, IERC721Receiver, IERC1155Receiver, IIPA
         address indexed to,
         uint256 value,
         bytes data,
-        uint256 nonce,
+        bytes32 nonce,
         uint256 deadline,
         address indexed signer,
         bytes signature
     );
 
+    receive() external payable;
+
     /// @notice Returns the IPAccount's internal nonce for transaction ordering.
-    function state() external view returns (uint256);
+    function state() external view returns (bytes32);
 
     /// @notice Returns the identifier of the non-fungible token which owns the account
     /// @return chainId The EIP-155 ID of the chain the token exists on

contracts/interfaces/IIPAccountStorage.sol

@@ -2,6 +2,8 @@
 // See https://github.com/storyprotocol/protocol-contracts/blob/main/StoryProtocol-AlphaTestingAgreement-17942166.3.pdf
 pragma solidity ^0.8.23;
 
+import { IERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
+
 /// @title IPAccount Namespaced Storage Interface
 /// @dev Provides a structured way to store IPAccount's state using a namespaced storage pattern.
 /// This interface facilitates conflict-free data writing by different Modules into the same IPAccount
@@ -15,7 +17,7 @@ pragma solidity ^0.8.23;
 /// - Every Module can read data from any namespace.
 /// - Only the owning Module (i.e., the Module whose address is used as the namespace) can write data into
 ///   its respective namespace.
-interface IIPAccountStorage {
+interface IIPAccountStorage is IERC165 {
     /// @dev Sets a bytes value under a given key within the default namespace, determined by `msg.sender`.
     /// @param key The key under which to store the value.
     /// @param value The bytes value to be stored.

contracts/lib/Errors.sol

@@ -23,6 +23,9 @@ library Errors {
     /// @notice Provided calldata is invalid.
     error IPAccount__InvalidCalldata();
 
+    /// @notice Execute operation type is not supported.
+    error IPAccount__InvalidOperation();
+
     ////////////////////////////////////////////////////////////////////////////
     //                            IP Account Storage                          //
     ////////////////////////////////////////////////////////////////////////////

contracts/lib/MetaTx.sol

@@ -20,7 +20,7 @@ library MetaTx {
         address to;
         uint256 value;
         bytes data;
-        uint256 nonce;
+        bytes32 nonce;
         uint256 deadline;
     }
 

package.json

@@ -59,6 +59,7 @@
         "@openzeppelin/contracts": "5.0.2",
         "@openzeppelin/contracts-upgradeable": "5.0.2",
         "@openzeppelin/contracts-upgradeable-v4": "npm:@openzeppelin/contracts-upgradeable@4.9.6",
-        "erc6551": "^0.3.1"
+        "erc6551": "^0.3.1",
+        "solady": "^0.0.192"
     }
 }

remappings.txt

@@ -2,4 +2,5 @@ ds-test/=node_modules/ds-test/src/
 forge-std/=node_modules/forge-std/src/
 @openzeppelin/=node_modules/@openzeppelin/
 @openzeppelin-foundry-upgrades/=lib/openzeppelin-foundry-upgrades
-@create3-deployer/=lib/create3-deployer
+@create3-deployer/=lib/create3-deployer
+@solady/=node_modules/solady/