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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. For security issues, contact: [email protected]

import { ModuleManager } from "../base/ModuleManager.sol";
import { IModule } from "../interfaces/modules/IModule.sol";
import { IERC7484 } from "../interfaces/IERC7484.sol";

/// @title NexusBootstrap Configuration for Nexus
/// @notice Provides configuration and initialization for Nexus smart accounts.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
struct BootstrapConfig {
    address module;
    bytes data;
}

/// @title NexusBootstrap
/// @notice Manages the installation of modules into Nexus smart accounts using delegatecalls.
contract NexusBootstrap is ModuleManager {
    /// @notice Initializes the Nexus account with a single validator.
    /// @dev Intended to be called by the Nexus with a delegatecall.
    /// @param validator The address of the validator module.
    /// @param data The initialization data for the validator module.
    function initNexusWithSingleValidator(
        IModule validator,
        bytes calldata data,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external {
        _configureRegistry(registry, attesters, threshold);
        _installValidator(address(validator), data);
    }

    /// @notice Initializes the Nexus account with multiple modules.
    /// @dev Intended to be called by the Nexus with a delegatecall.
    /// @param validators The configuration array for validator modules.
    /// @param executors The configuration array for executor modules.
    /// @param hook The configuration for the hook module.
    /// @param fallbacks The configuration array for fallback handler modules.
    function initNexus(
        BootstrapConfig[] calldata validators,
        BootstrapConfig[] calldata executors,
        BootstrapConfig calldata hook,
        BootstrapConfig[] calldata fallbacks,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external {
        _configureRegistry(registry, attesters, threshold);

        // Initialize validators
        for (uint256 i = 0; i < validators.length; i++) {
            _installValidator(validators[i].module, validators[i].data);
        }

        // Initialize executors
        for (uint256 i = 0; i < executors.length; i++) {
            if (executors[i].module == address(0)) continue;
            _installExecutor(executors[i].module, executors[i].data);
        }

        // Initialize hook
        if (hook.module != address(0)) {
            _installHook(hook.module, hook.data);
        }

        // Initialize fallback handlers
        for (uint256 i = 0; i < fallbacks.length; i++) {
            if (fallbacks[i].module == address(0)) continue;
            _installFallbackHandler(fallbacks[i].module, fallbacks[i].data);
        }
    }

    /// @notice Initializes the Nexus account with a scoped set of modules.
    /// @dev Intended to be called by the Nexus with a delegatecall.
    /// @param validators The configuration array for validator modules.
    /// @param hook The configuration for the hook module.
    function initNexusScoped(
        BootstrapConfig[] calldata validators,
        BootstrapConfig calldata hook,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external {
        _configureRegistry(registry, attesters, threshold);

        // Initialize validators
        for (uint256 i = 0; i < validators.length; i++) {
            _installValidator(validators[i].module, validators[i].data);
        }

        // Initialize hook
        if (hook.module != address(0)) {
            _installHook(hook.module, hook.data);
        }
    }

    /// @notice Prepares calldata for the initNexus function.
    /// @param validators The configuration array for validator modules.
    /// @param executors The configuration array for executor modules.
    /// @param hook The configuration for the hook module.
    /// @param fallbacks The configuration array for fallback handler modules.
    /// @return init The prepared calldata for initNexus.
    function getInitNexusCalldata(
        BootstrapConfig[] calldata validators,
        BootstrapConfig[] calldata executors,
        BootstrapConfig calldata hook,
        BootstrapConfig[] calldata fallbacks,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external view returns (bytes memory init) {
        init = abi.encode(address(this), abi.encodeCall(this.initNexus, (validators, executors, hook, fallbacks, registry, attesters, threshold)));
    }

    /// @notice Prepares calldata for the initNexusScoped function.
    /// @param validators The configuration array for validator modules.
    /// @param hook The configuration for the hook module.
    /// @return init The prepared calldata for initNexusScoped.
    function getInitNexusScopedCalldata(
        BootstrapConfig[] calldata validators,
        BootstrapConfig calldata hook,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external view returns (bytes memory init) {
        init = abi.encode(address(this), abi.encodeCall(this.initNexusScoped, (validators, hook, registry, attesters, threshold)));
    }

    /// @notice Prepares calldata for the initNexusWithSingleValidator function.
    /// @param validator The configuration for the validator module.
    /// @return init The prepared calldata for initNexusWithSingleValidator.
    function getInitNexusWithSingleValidatorCalldata(
        BootstrapConfig calldata validator,
        IERC7484 registry,
        address[] calldata attesters,
        uint8 threshold
    ) external view returns (bytes memory init) {
        init = abi.encode(
            address(this),
            abi.encodeCall(this.initNexusWithSingleValidator, (IModule(validator.module), validator.data, registry, attesters, threshold))
        );
    }

    /// @dev EIP712 domain name and version.
    function _domainNameAndVersion() internal pure override returns (string memory name, string memory version) {
        name = "NexusBootstrap";
        version = "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { SentinelListLib } from "sentinellist/SentinelList.sol";
import { Storage } from "./Storage.sol";
import { IHook } from "../interfaces/modules/IHook.sol";
import { IModule } from "../interfaces/modules/IModule.sol";
import { IExecutor } from "../interfaces/modules/IExecutor.sol";
import { IFallback } from "../interfaces/modules/IFallback.sol";
import { IValidator } from "../interfaces/modules/IValidator.sol";
import { CallType, CALLTYPE_SINGLE, CALLTYPE_STATIC } from "../lib/ModeLib.sol";
import { ExecLib } from "../lib/ExecLib.sol";
import { LocalCallDataParserLib } from "../lib/local/LocalCallDataParserLib.sol";
import { IModuleManagerEventsAndErrors } from "../interfaces/base/IModuleManagerEventsAndErrors.sol";
import { MODULE_TYPE_VALIDATOR, MODULE_TYPE_EXECUTOR, MODULE_TYPE_FALLBACK, MODULE_TYPE_HOOK, MODULE_TYPE_MULTI, MODULE_ENABLE_MODE_TYPE_HASH, ERC1271_MAGICVALUE } from "../types/Constants.sol";
import { EIP712 } from "solady/utils/EIP712.sol";
import { ExcessivelySafeCall } from "excessively-safe-call/ExcessivelySafeCall.sol";
import { RegistryAdapter } from "./RegistryAdapter.sol";

/// @title Nexus - ModuleManager
/// @notice Manages Validator, Executor, Hook, and Fallback modules within the Nexus suite, supporting
/// @dev Implements SentinelList for managing modules via a linked list structure, adhering to ERC-7579.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
abstract contract ModuleManager is Storage, EIP712, IModuleManagerEventsAndErrors, RegistryAdapter {
    using SentinelListLib for SentinelListLib.SentinelList;
    using LocalCallDataParserLib for bytes;
    using ExecLib for address;
    using ExcessivelySafeCall for address;

    /// @notice Ensures the message sender is a registered executor module.
    modifier onlyExecutorModule() virtual {
        require(_getAccountStorage().executors.contains(msg.sender), InvalidModule(msg.sender));
        _;
    }

    /// @notice Does pre-checks and post-checks using an installed hook on the account.
    /// @dev sender, msg.data and msg.value is passed to the hook to implement custom flows.
    modifier withHook() {
        address hook = _getHook();
        if (hook == address(0)) {
            _;
        } else {
            bytes memory hookData = IHook(hook).preCheck(msg.sender, msg.value, msg.data);
            _;
            IHook(hook).postCheck(hookData);
        }
    }

    receive() external payable {}

    /// @dev Fallback function to manage incoming calls using designated handlers based on the call type.
    fallback(bytes calldata callData) external payable withHook returns (bytes memory) {
        return _fallback(callData);
    }

    /// @dev Retrieves a paginated list of validator addresses from the linked list.
    /// This utility function is not defined by the ERC-7579 standard and is implemented to facilitate
    /// easier management and retrieval of large sets of validator modules.
    /// @param cursor The address to start pagination from, or zero to start from the first entry.
    /// @param size The number of validator addresses to return.
    /// @return array An array of validator addresses.
    /// @return next The address to use as a cursor for the next page of results.
    function getValidatorsPaginated(address cursor, uint256 size) external view returns (address[] memory array, address next) {
        (array, next) = _paginate(_getAccountStorage().validators, cursor, size);
    }

    /// @dev Retrieves a paginated list of executor addresses from the linked list.
    /// This utility function is not defined by the ERC-7579 standard and is implemented to facilitate
    /// easier management and retrieval of large sets of executor modules.
    /// @param cursor The address to start pagination from, or zero to start from the first entry.
    /// @param size The number of executor addresses to return.
    /// @return array An array of executor addresses.
    /// @return next The address to use as a cursor for the next page of results.
    function getExecutorsPaginated(address cursor, uint256 size) external view returns (address[] memory array, address next) {
        (array, next) = _paginate(_getAccountStorage().executors, cursor, size);
    }

    /// @notice Retrieves the currently active hook address.
    /// @return hook The address of the active hook module.
    function getActiveHook() external view returns (address hook) {
        return _getHook();
    }

    /// @notice Fetches the fallback handler for a specific selector.
    /// @param selector The function selector to query.
    /// @return calltype The type of call that the handler manages.
    /// @return handler The address of the fallback handler.
    function getFallbackHandlerBySelector(bytes4 selector) external view returns (CallType, address) {
        FallbackHandler memory handler = _getAccountStorage().fallbacks[selector];
        return (handler.calltype, handler.handler);
    }

    /// @dev Initializes the module manager by setting up default states for validators and executors.
    function _initModuleManager() internal virtual {
        // account module storage
        AccountStorage storage ams = _getAccountStorage();
        ams.executors.init();
        ams.validators.init();
    }

    /// @dev Implements Module Enable Mode flow.
    /// @param packedData Data source to parse data required to perform Module Enable mode from.
    /// @return userOpSignature the clean signature which can be further used for userOp validation
    function _enableMode(bytes32 userOpHash, bytes calldata packedData) internal returns (bytes calldata userOpSignature) {
        address module;
        uint256 moduleType;
        bytes calldata moduleInitData;
        bytes calldata enableModeSignature;

        (module, moduleType, moduleInitData, enableModeSignature, userOpSignature) = packedData.parseEnableModeData();

        if (!_checkEnableModeSignature(_getEnableModeDataHash(module, moduleType, userOpHash, moduleInitData), enableModeSignature))
            revert EnableModeSigError();

        _installModule(moduleType, module, moduleInitData);
    }

    /// @notice Installs a new module to the smart account.
    /// @param moduleTypeId The type identifier of the module being installed, which determines its role:
    /// - 0 for MultiType
    /// - 1 for Validator
    /// - 2 for Executor
    /// - 3 for Fallback
    /// - 4 for Hook
    /// @param module The address of the module to install.
    /// @param initData Initialization data for the module.
    /// @dev This function goes through hook checks via withHook modifier.
    /// @dev No need to check that the module is already installed, as this check is done
    /// when trying to sstore the module in an appropriate SentinelList
    function _installModule(uint256 moduleTypeId, address module, bytes calldata initData) internal withHook {
        if (module == address(0)) revert ModuleAddressCanNotBeZero();
        if (moduleTypeId == MODULE_TYPE_VALIDATOR) {
            _installValidator(module, initData);
        } else if (moduleTypeId == MODULE_TYPE_EXECUTOR) {
            _installExecutor(module, initData);
        } else if (moduleTypeId == MODULE_TYPE_FALLBACK) {
            _installFallbackHandler(module, initData);
        } else if (moduleTypeId == MODULE_TYPE_HOOK) {
            _installHook(module, initData);
        } else if (moduleTypeId == MODULE_TYPE_MULTI) {
            _multiTypeInstall(module, initData);
        } else {
            revert InvalidModuleTypeId(moduleTypeId);
        }
    }

    /// @dev Installs a new validator module after checking if it matches the required module type.
    /// @param validator The address of the validator module to be installed.
    /// @param data Initialization data to configure the validator upon installation.
    function _installValidator(address validator, bytes calldata data) internal virtual withRegistry(validator, MODULE_TYPE_VALIDATOR) {
        if (!IValidator(validator).isModuleType(MODULE_TYPE_VALIDATOR)) revert MismatchModuleTypeId(MODULE_TYPE_VALIDATOR);
        _getAccountStorage().validators.push(validator);
        IValidator(validator).onInstall(data);
    }

    /// @dev Uninstalls a validator module /!\ ensuring the account retains at least one validator.
    /// @param validator The address of the validator to be uninstalled.
    /// @param data De-initialization data to configure the validator upon uninstallation.
    function _uninstallValidator(address validator, bytes calldata data) internal virtual {
        SentinelListLib.SentinelList storage validators = _getAccountStorage().validators;

        (address prev, bytes memory disableModuleData) = abi.decode(data, (address, bytes));

        // Perform the removal first
        validators.pop(prev, validator);

        // Sentinel pointing to itself / zero means the list is empty / uninitialized, so check this after removal
        // Below error is very specific to uninstalling validators.
        require(_hasValidators(), CanNotRemoveLastValidator());
        validator.excessivelySafeCall(gasleft(), 0, 0, abi.encodeWithSelector(IModule.onUninstall.selector, disableModuleData));
    }

    /// @dev Installs a new executor module after checking if it matches the required module type.
    /// @param executor The address of the executor module to be installed.
    /// @param data Initialization data to configure the executor upon installation.
    function _installExecutor(address executor, bytes calldata data) internal virtual withRegistry(executor, MODULE_TYPE_EXECUTOR) {
        if (!IExecutor(executor).isModuleType(MODULE_TYPE_EXECUTOR)) revert MismatchModuleTypeId(MODULE_TYPE_EXECUTOR);
        _getAccountStorage().executors.push(executor);
        IExecutor(executor).onInstall(data);
    }

    /// @dev Uninstalls an executor module by removing it from the executors list.
    /// @param executor The address of the executor to be uninstalled.
    /// @param data De-initialization data to configure the executor upon uninstallation.
    function _uninstallExecutor(address executor, bytes calldata data) internal virtual {
        (address prev, bytes memory disableModuleData) = abi.decode(data, (address, bytes));
        _getAccountStorage().executors.pop(prev, executor);
        executor.excessivelySafeCall(gasleft(), 0, 0, abi.encodeWithSelector(IModule.onUninstall.selector, disableModuleData));
    }

    /// @dev Installs a hook module, ensuring no other hooks are installed before proceeding.
    /// @param hook The address of the hook to be installed.
    /// @param data Initialization data to configure the hook upon installation.
    function _installHook(address hook, bytes calldata data) internal virtual withRegistry(hook, MODULE_TYPE_HOOK) {
        if (!IHook(hook).isModuleType(MODULE_TYPE_HOOK)) revert MismatchModuleTypeId(MODULE_TYPE_HOOK);
        address currentHook = _getHook();
        require(currentHook == address(0), HookAlreadyInstalled(currentHook));
        _setHook(hook);
        IHook(hook).onInstall(data);
    }

    /// @dev Uninstalls a hook module, ensuring the current hook matches the one intended for uninstallation.
    /// @param hook The address of the hook to be uninstalled.
    /// @param data De-initialization data to configure the hook upon uninstallation.
    function _uninstallHook(address hook, bytes calldata data) internal virtual {
        _setHook(address(0));
        hook.excessivelySafeCall(gasleft(), 0, 0, abi.encodeWithSelector(IModule.onUninstall.selector, data));
    }

    /// @dev Sets the current hook in the storage to the specified address.
    /// @param hook The new hook address.
    function _setHook(address hook) internal virtual {
        _getAccountStorage().hook = IHook(hook);
    }

    /// @dev Installs a fallback handler for a given selector with initialization data.
    /// @param handler The address of the fallback handler to install.
    /// @param params The initialization parameters including the selector and call type.
    function _installFallbackHandler(address handler, bytes calldata params) internal virtual withRegistry(handler, MODULE_TYPE_FALLBACK) {
        if (!IFallback(handler).isModuleType(MODULE_TYPE_FALLBACK)) revert MismatchModuleTypeId(MODULE_TYPE_FALLBACK);
        // Extract the function selector from the provided parameters.
        bytes4 selector = bytes4(params[0:4]);

        // Extract the call type from the provided parameters.
        CallType calltype = CallType.wrap(bytes1(params[4]));

        require(calltype == CALLTYPE_SINGLE || calltype == CALLTYPE_STATIC, FallbackCallTypeInvalid());

        // Extract the initialization data from the provided parameters.
        bytes memory initData = params[5:];

        // Revert if the selector is either `onInstall(bytes)` (0x6d61fe70) or `onUninstall(bytes)` (0x8a91b0e3) or explicit bytes(0).
        // These selectors are explicitly forbidden to prevent security vulnerabilities.
        // Allowing these selectors would enable unauthorized users to uninstall and reinstall critical modules.
        // If a validator module is uninstalled and reinstalled without proper authorization, it can compromise
        // the account's security and integrity. By restricting these selectors, we ensure that the fallback handler
        // cannot be manipulated to disrupt the expected behavior and security of the account.
        require(!(selector == bytes4(0x6d61fe70) || selector == bytes4(0x8a91b0e3) || selector == bytes4(0)), FallbackSelectorForbidden());

        // Revert if a fallback handler is already installed for the given selector.
        // This check ensures that we do not overwrite an existing fallback handler, which could lead to unexpected behavior.
        require(!_isFallbackHandlerInstalled(selector), FallbackAlreadyInstalledForSelector(selector));

        // Store the fallback handler and its call type in the account storage.
        // This maps the function selector to the specified fallback handler and call type.
        _getAccountStorage().fallbacks[selector] = FallbackHandler(handler, calltype);

        // Invoke the `onInstall` function of the fallback handler with the provided initialization data.
        // This step allows the fallback handler to perform any necessary setup or initialization.
        IFallback(handler).onInstall(initData);
    }

    /// @dev Uninstalls a fallback handler for a given selector.
    /// @param fallbackHandler The address of the fallback handler to uninstall.
    /// @param data The de-initialization data containing the selector.
    function _uninstallFallbackHandler(address fallbackHandler, bytes calldata data) internal virtual {
        _getAccountStorage().fallbacks[bytes4(data[0:4])] = FallbackHandler(address(0), CallType.wrap(0x00));
        fallbackHandler.excessivelySafeCall(gasleft(), 0, 0, abi.encodeWithSelector(IModule.onUninstall.selector, data[4:]));
    }

    /// @notice Installs a module with multiple types in a single operation.
    /// @dev This function handles installing a multi-type module by iterating through each type and initializing it.
    /// The initData should include an ABI-encoded tuple of (uint[] types, bytes[] initDatas).
    /// @param module The address of the multi-type module.
    /// @param initData Initialization data for each type within the module.
    function _multiTypeInstall(address module, bytes calldata initData) internal virtual {
        (uint256[] calldata types, bytes[] calldata initDatas) = initData.parseMultiTypeInitData();

        uint256 length = types.length;
        if (initDatas.length != length) revert InvalidInput();

        // iterate over all module types and install the module as a type accordingly
        for (uint256 i; i < length; i++) {
            uint256 theType = types[i];

            /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
            /*                      INSTALL VALIDATORS                    */
            /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
            if (theType == MODULE_TYPE_VALIDATOR) {
                _installValidator(module, initDatas[i]);
            }
            /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
            /*                       INSTALL EXECUTORS                    */
            /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
            else if (theType == MODULE_TYPE_EXECUTOR) {
                _installExecutor(module, initDatas[i]);
            }
            /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
            /*                       INSTALL FALLBACK                     */
            /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
            else if (theType == MODULE_TYPE_FALLBACK) {
                _installFallbackHandler(module, initDatas[i]);
            }
            /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
            /*          INSTALL HOOK (global only, not sig-specific)      */
            /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
            else if (theType == MODULE_TYPE_HOOK) {
                _installHook(module, initDatas[i]);
            }
        }
    }

    /// @notice Checks if an enable mode signature is valid.
    /// @param structHash data hash.
    /// @param sig Signature.
    function _checkEnableModeSignature(bytes32 structHash, bytes calldata sig) internal view returns (bool) {
        address enableModeSigValidator = address(bytes20(sig[0:20]));
        if (!_isValidatorInstalled(enableModeSigValidator)) {
            revert ValidatorNotInstalled(enableModeSigValidator);
        }
        bytes32 eip712Digest = _hashTypedData(structHash);

        // Use standard IERC-1271/ERC-7739 interface.
        // Even if the validator doesn't support 7739 under the hood, it is still secure,
        // as eip712digest is already built based on 712Domain of this Smart Account
        // This interface should always be exposed by validators as per ERC-7579
        try IValidator(enableModeSigValidator).isValidSignatureWithSender(address(this), eip712Digest, sig[20:]) returns (bytes4 res) {
            return res == ERC1271_MAGICVALUE;
        } catch {
            return false;
        }
    }

    /// @notice Builds the enable mode data hash as per eip712
    /// @param module Module being enabled
    /// @param moduleType Type of the module as per EIP-7579
    /// @param userOpHash Hash of the User Operation
    /// @param initData Module init data.
    /// @return structHash data hash
    function _getEnableModeDataHash(address module, uint256 moduleType, bytes32 userOpHash, bytes calldata initData) internal view returns (bytes32) {
        return keccak256(abi.encode(MODULE_ENABLE_MODE_TYPE_HASH, module, moduleType, userOpHash, keccak256(initData)));
    }

    /// @notice Checks if a module is installed on the smart account.
    /// @param moduleTypeId The module type ID.
    /// @param module The module address.
    /// @param additionalContext Additional context for checking installation.
    /// @return True if the module is installed, false otherwise.
    function _isModuleInstalled(uint256 moduleTypeId, address module, bytes calldata additionalContext) internal view returns (bool) {
        additionalContext;
        if (moduleTypeId == MODULE_TYPE_VALIDATOR) {
            return _isValidatorInstalled(module);
        } else if (moduleTypeId == MODULE_TYPE_EXECUTOR) {
            return _isExecutorInstalled(module);
        } else if (moduleTypeId == MODULE_TYPE_FALLBACK) {
            bytes4 selector;
            if (additionalContext.length >= 4) {
                selector = bytes4(additionalContext[0:4]);
            } else {
                selector = bytes4(0x00000000);
            }
            return _isFallbackHandlerInstalled(selector, module);
        } else if (moduleTypeId == MODULE_TYPE_HOOK) {
            return _isHookInstalled(module);
        } else {
            return false;
        }
    }

    /// @dev Checks if a fallback handler is set for a given selector.
    /// @param selector The function selector to check.
    /// @return True if a fallback handler is set, otherwise false.
    function _isFallbackHandlerInstalled(bytes4 selector) internal view virtual returns (bool) {
        FallbackHandler storage handler = _getAccountStorage().fallbacks[selector];
        return handler.handler != address(0);
    }

    /// @dev Checks if the expected fallback handler is installed for a given selector.
    /// @param selector The function selector to check.
    /// @param expectedHandler The address of the handler expected to be installed.
    /// @return True if the installed handler matches the expected handler, otherwise false.
    function _isFallbackHandlerInstalled(bytes4 selector, address expectedHandler) internal view returns (bool) {
        FallbackHandler storage handler = _getAccountStorage().fallbacks[selector];
        return handler.handler == expectedHandler;
    }

    /// @dev Checks if a validator is currently installed.
    /// @param validator The address of the validator to check.
    /// @return True if the validator is installed, otherwise false.
    function _isValidatorInstalled(address validator) internal view virtual returns (bool) {
        return _getAccountStorage().validators.contains(validator);
    }

    /// @dev Checks if there is at least one validator installed.
    /// @return True if there is at least one validator, otherwise false.
    function _hasValidators() internal view returns (bool) {
        return
            _getAccountStorage().validators.getNext(address(0x01)) != address(0x01) &&
            _getAccountStorage().validators.getNext(address(0x01)) != address(0x00);
    }

    /// @dev Checks if an executor is currently installed.
    /// @param executor The address of the executor to check.
    /// @return True if the executor is installed, otherwise false.
    function _isExecutorInstalled(address executor) internal view virtual returns (bool) {
        return _getAccountStorage().executors.contains(executor);
    }

    /// @dev Checks if a hook is currently installed.
    /// @param hook The address of the hook to check.
    /// @return True if the hook is installed, otherwise false.
    function _isHookInstalled(address hook) internal view returns (bool) {
        return _getHook() == hook;
    }

    /// @dev Retrieves the current hook from the storage.
    /// @return hook The address of the current hook.
    function _getHook() internal view returns (address hook) {
        hook = address(_getAccountStorage().hook);
    }

    function _fallback(bytes calldata callData) private returns (bytes memory result) {
        bool success;
        FallbackHandler storage $fallbackHandler = _getAccountStorage().fallbacks[msg.sig];
        address handler = $fallbackHandler.handler;
        CallType calltype = $fallbackHandler.calltype;

        if (handler != address(0)) {
            //if there's a fallback handler, call it
            if (calltype == CALLTYPE_STATIC) {
                (success, result) = handler.staticcall(ExecLib.get2771CallData(callData));
            } else if (calltype == CALLTYPE_SINGLE) {
                (success, result) = handler.call{ value: msg.value }(ExecLib.get2771CallData(callData));
            } else {
                revert UnsupportedCallType(calltype);
            }

            // Use revert message from fallback handler if the call was not successful
            if (!success) {
                assembly {
                    revert(add(result, 0x20), mload(result))
                }
            }
        } else {
            // If there's no handler, the call can be one of onERCXXXReceived()
            bytes32 s;
            /// @solidity memory-safe-assembly
            assembly {
                s := shr(224, calldataload(0))
                // 0x150b7a02: `onERC721Received(address,address,uint256,bytes)`.
                // 0xf23a6e61: `onERC1155Received(address,address,uint256,uint256,bytes)`.
                // 0xbc197c81: `onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)`.
                if or(eq(s, 0x150b7a02), or(eq(s, 0xf23a6e61), eq(s, 0xbc197c81))) {
                    success := true // it is one of onERCXXXReceived
                    result := mload(0x40) //result was set to 0x60 as it was empty, so we need to find a new space for it
                    mstore(result, 0x04) //store length
                    mstore(add(result, 0x20), shl(224, s)) //store calldata
                    mstore(0x40, add(result, 0x24)) //allocate memory
                }
            }
            // if there was no handler and it is not the onERCXXXReceived call, revert
            require(success, MissingFallbackHandler(msg.sig));
        }
    }

    /// @dev Helper function to paginate entries in a SentinelList.
    /// @param list The SentinelList to paginate.
    /// @param cursor The cursor to start paginating from.
    /// @param size The number of entries to return.
    /// @return array The array of addresses in the list.
    /// @return nextCursor The cursor for the next page of entries.
    function _paginate(
        SentinelListLib.SentinelList storage list,
        address cursor,
        uint256 size
    ) private view returns (address[] memory array, address nextCursor) {
        (array, nextCursor) = list.getEntriesPaginated(cursor, size);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

/// @title Nexus - ERC-7579 Module Base Interface
/// @notice Interface for module management in smart accounts, complying with ERC-7579 specifications.
/// @dev Defines the lifecycle hooks and checks for modules within the smart account architecture.
/// This interface includes methods for installing, uninstalling, and verifying module types and initialization status.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IModule {
    /// @notice Installs the module with necessary initialization data.
    /// @dev Reverts if the module is already initialized.
    /// @param data Arbitrary data required for initializing the module during `onInstall`.
    function onInstall(bytes calldata data) external;

    /// @notice Uninstalls the module and allows for cleanup via arbitrary data.
    /// @dev Reverts if any issues occur that prevent clean uninstallation.
    /// @param data Arbitrary data required for deinitializing the module during `onUninstall`.
    function onUninstall(bytes calldata data) external;

    /// @notice Determines if the module matches a specific module type.
    /// @dev Should return true if the module corresponds to the type ID, false otherwise.
    /// @param moduleTypeId Numeric ID of the module type as per ERC-7579 specifications.
    /// @return True if the module is of the specified type, false otherwise.
    function isModuleType(uint256 moduleTypeId) external view returns (bool);

    /// @notice Checks if the module has been initialized for a specific smart account.
    /// @dev Returns true if initialized, false otherwise.
    /// @param smartAccount Address of the smart account to check for initialization status.
    /// @return True if the module is initialized for the given smart account, false otherwise.
    function isInitialized(address smartAccount) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

interface IERC7484 {
    event NewTrustedAttesters();

    /**
     * Allows Smart Accounts - the end users of the registry - to appoint
     * one or many attesters as trusted.
     * @dev this function reverts, if address(0), or duplicates are provided in attesters[]
     *
     * @param threshold The minimum number of attestations required for a module
     *                  to be considered secure.
     * @param attesters The addresses of the attesters to be trusted.
     */
    function trustAttesters(uint8 threshold, address[] calldata attesters) external;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*          Check with Registry internal attesters            */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    function check(address module) external view;

    function checkForAccount(address smartAccount, address module) external view;

    function check(address module, uint256 moduleType) external view;

    function checkForAccount(address smartAccount, address module, uint256 moduleType) external view;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*              Check with external attester(s)               */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    function check(address module, address[] calldata attesters, uint256 threshold) external view;

    function check(address module, uint256 moduleType, address[] calldata attesters, uint256 threshold) external view;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Sentinel address
address constant SENTINEL = address(0x1);
// Zero address
address constant ZERO_ADDRESS = address(0x0);

/**
 * @title SentinelListLib
 * @dev Library for managing a linked list of addresses
 * @author Rhinestone
 */
library SentinelListLib {
    // Struct to hold the linked list
    struct SentinelList {
        mapping(address => address) entries;
    }

    error LinkedList_AlreadyInitialized();
    error LinkedList_InvalidPage();
    error LinkedList_InvalidEntry(address entry);
    error LinkedList_EntryAlreadyInList(address entry);

    /**
     * Initialize the linked list
     *
     * @param self The linked list
     */
    function init(SentinelList storage self) internal {
        if (alreadyInitialized(self)) revert LinkedList_AlreadyInitialized();
        self.entries[SENTINEL] = SENTINEL;
    }

    /**
     * Check if the linked list is already initialized
     *
     * @param self The linked list
     *
     * @return bool True if the linked list is already initialized
     */
    function alreadyInitialized(SentinelList storage self) internal view returns (bool) {
        return self.entries[SENTINEL] != ZERO_ADDRESS;
    }

    /**
     * Get the next entry in the linked list
     *
     * @param self The linked list
     * @param entry The current entry
     *
     * @return address The next entry
     */
    function getNext(SentinelList storage self, address entry) internal view returns (address) {
        if (entry == ZERO_ADDRESS) {
            revert LinkedList_InvalidEntry(entry);
        }
        return self.entries[entry];
    }

    /**
     * Push a new entry to the linked list
     *
     * @param self The linked list
     * @param newEntry The new entry
     */
    function push(SentinelList storage self, address newEntry) internal {
        if (newEntry == ZERO_ADDRESS || newEntry == SENTINEL) {
            revert LinkedList_InvalidEntry(newEntry);
        }
        if (self.entries[newEntry] != ZERO_ADDRESS) revert LinkedList_EntryAlreadyInList(newEntry);
        self.entries[newEntry] = self.entries[SENTINEL];
        self.entries[SENTINEL] = newEntry;
    }

    /**
     * Safe push a new entry to the linked list
     * @dev This ensures that the linked list is initialized and initializes it if it is not
     *
     * @param self The linked list
     * @param newEntry The new entry
     */
    function safePush(SentinelList storage self, address newEntry) internal {
        if (!alreadyInitialized({ self: self })) {
            init({ self: self });
        }
        push({ self: self, newEntry: newEntry });
    }

    /**
     * Pop an entry from the linked list
     *
     * @param self The linked list
     * @param prevEntry The entry before the entry to pop
     * @param popEntry The entry to pop
     */
    function pop(SentinelList storage self, address prevEntry, address popEntry) internal {
        if (popEntry == ZERO_ADDRESS || popEntry == SENTINEL) {
            revert LinkedList_InvalidEntry(prevEntry);
        }
        if (self.entries[prevEntry] != popEntry) revert LinkedList_InvalidEntry(popEntry);
        self.entries[prevEntry] = self.entries[popEntry];
        self.entries[popEntry] = ZERO_ADDRESS;
    }

    /**
     * Pop all entries from the linked list
     *
     * @param self The linked list
     */
    function popAll(SentinelList storage self) internal {
        address next = self.entries[SENTINEL];
        while (next != ZERO_ADDRESS) {
            address current = next;
            next = self.entries[next];
            self.entries[current] = ZERO_ADDRESS;
        }
    }

    /**
     * Check if the linked list contains an entry
     *
     * @param self The linked list
     * @param entry The entry to check
     *
     * @return bool True if the linked list contains the entry
     */
    function contains(SentinelList storage self, address entry) internal view returns (bool) {
        return SENTINEL != entry && self.entries[entry] != ZERO_ADDRESS;
    }

    /**
     * Get all entries in the linked list
     *
     * @param self The linked list
     * @param start The start entry
     * @param pageSize The page size
     *
     * @return array All entries in the linked list
     * @return next The next entry
     */
    function getEntriesPaginated(
        SentinelList storage self,
        address start,
        uint256 pageSize
    )
        internal
        view
        returns (address[] memory array, address next)
    {
        if (start != SENTINEL && !contains(self, start)) revert LinkedList_InvalidEntry(start);
        if (pageSize == 0) revert LinkedList_InvalidPage();
        // Init array with max page size
        array = new address[](pageSize);

        // Populate return array
        uint256 entryCount = 0;
        next = self.entries[start];
        while (next != ZERO_ADDRESS && next != SENTINEL && entryCount < pageSize) {
            array[entryCount] = next;
            next = self.entries[next];
            entryCount++;
        }

        /**
         * Because of the argument validation, we can assume that the loop will always iterate over
         * the valid entry list values
         *       and the `next` variable will either be an enabled entry or a sentinel address
         * (signalling the end).
         *
         *       If we haven't reached the end inside the loop, we need to set the next pointer to
         * the last element of the entry array
         *       because the `next` variable (which is a entry by itself) acting as a pointer to the
         * start of the next page is neither
         *       incSENTINELrent page, nor will it be included in the next one if you pass it as a
         * start.
         */
        if (next != SENTINEL && entryCount > 0) {
            next = array[entryCount - 1];
        }
        // Set correct size of returned array
        // solhint-disable-next-line no-inline-assembly
        /// @solidity memory-safe-assembly
        assembly {
            mstore(array, entryCount)
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { IStorage } from "../interfaces/base/IStorage.sol";

/// @title Nexus - Storage
/// @notice Manages isolated storage spaces for Modular Smart Account in compliance with ERC-7201 standard to ensure collision-resistant storage.
/// @dev Implements the ERC-7201 namespaced storage pattern to maintain secure and isolated storage sections for different states within Nexus suite.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
contract Storage is IStorage {
    /// @custom:storage-location erc7201:biconomy.storage.Nexus
    /// ERC-7201 namespaced via `keccak256(abi.encode(uint256(keccak256(bytes("biconomy.storage.Nexus"))) - 1)) & ~bytes32(uint256(0xff));`
    bytes32 private constant _STORAGE_LOCATION = 0x0bb70095b32b9671358306b0339b4c06e7cbd8cb82505941fba30d1eb5b82f00;

    /// @dev Utilizes ERC-7201's namespaced storage pattern for isolated storage access. This method computes
    /// the storage slot based on a predetermined location, ensuring collision-resistant storage for contract states.
    /// @custom:storage-location ERC-7201 formula applied to "biconomy.storage.Nexus", facilitating unique
    /// namespace identification and storage segregation, as detailed in the specification.
    /// @return $ The proxy to the `AccountStorage` struct, providing a reference to the namespaced storage slot.
    function _getAccountStorage() internal pure returns (AccountStorage storage $) {
        assembly {
            $.slot := _STORAGE_LOCATION
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { IModule } from "./IModule.sol";

/// @title Hook Management Interface
/// @notice Provides methods for pre-checks and post-checks of transactions to ensure conditions and state consistency.
/// @dev Defines two critical lifecycle hooks in the transaction process: `preCheck` and `postCheck`.
/// These methods facilitate validating conditions prior to execution and verifying state changes afterwards, respectively.
interface IHook is IModule {
    /// @notice Performs checks before a transaction is executed, potentially modifying the transaction context.
    /// @dev This method is called before the execution of a transaction to validate and possibly adjust execution context.
    /// @param msgSender The original sender of the transaction.
    /// @param msgValue The amount of wei sent with the call.
    /// @param msgData The calldata of the transaction.
    /// @return hookData Data that may be used or modified throughout the transaction lifecycle, passed to `postCheck`.
    function preCheck(address msgSender, uint256 msgValue, bytes calldata msgData) external returns (bytes memory hookData);

    /// @notice Performs checks after a transaction is executed to ensure state consistency and log results.
    /// @dev This method is called after the execution of a transaction to verify and react to the execution outcome.
    /// @param hookData Data returned from `preCheck`, containing execution context or modifications.
    function postCheck(bytes calldata hookData) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { IModule } from "./IModule.sol";

/// @title Nexus - IExecutor Interface
/// @notice Defines the interface for Executor modules within the Nexus Smart Account framework, compliant with the ERC-7579 standard.
/// @dev Extends IModule to include functionalities specific to execution modules.
/// This interface is future-proof, allowing for expansion and integration of advanced features in subsequent versions.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IExecutor is IModule {
    // Future methods for execution management will be defined here to accommodate evolving requirements.
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { IModule } from "./IModule.sol";

/// @title Nexus - IFallback Interface
/// @notice Defines the interface for Fallback modules within the Nexus Smart Account framework, compliant with the ERC-7579 standard.
/// @dev Extends IModule to include functionalities specific to fallback modules.
/// This interface is future-proof, allowing for expansion and integration of advanced features in subsequent versions.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IFallback is IModule {
    // Future methods for fallback management will be defined here to accommodate evolving blockchain technologies.
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { PackedUserOperation } from "account-abstraction/interfaces/PackedUserOperation.sol";

import { IModule } from "./IModule.sol";

/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IValidator is IModule {
    /// @notice Validates a user operation as per ERC-4337 standard requirements.
    /// @dev Should ensure that the signature and nonce are verified correctly before the transaction is allowed to proceed.
    /// The function returns a status code indicating validation success or failure.
    /// @param userOp The user operation containing transaction details to be validated.
    /// @param userOpHash The hash of the user operation data, used for verifying the signature.
    /// @return status The result of the validation process, typically indicating success or the type of failure.
    function validateUserOp(PackedUserOperation calldata userOp, bytes32 userOpHash) external returns (uint256);

    /// @notice Verifies a signature against a hash, using the sender's address as a contextual check.
    /// @dev Used to confirm the validity of a signature against the specific conditions set by the sender.
    /// @param sender The address from which the operation was initiated, adding an additional layer of validation against the signature.
    /// @param hash The hash of the data signed.
    /// @param data The signature data to validate.
    /// @return magicValue A bytes4 value that corresponds to the ERC-1271 standard, indicating the validity of the signature.
    function isValidSignatureWithSender(address sender, bytes32 hash, bytes calldata data) external view returns (bytes4);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

/// @title ModeLib
/// @author zeroknots.eth | rhinestone.wtf
/// To allow smart accounts to be very simple, but allow for more complex execution, A custom mode
/// encoding is used.
///    Function Signature of execute function:
///           function execute(ExecutionMode mode, bytes calldata executionCalldata) external payable;
/// This allows for a single bytes32 to be used to encode the execution mode, calltype, execType and
/// context.
/// NOTE: Simple Account implementations only have to scope for the most significant byte. Account  that
/// implement
/// more complex execution modes may use the entire bytes32.
///
/// |--------------------------------------------------------------------|
/// | CALLTYPE  | EXECTYPE  |   UNUSED   | ModeSelector  |  ModePayload  |
/// |--------------------------------------------------------------------|
/// | 1 byte    | 1 byte    |   4 bytes  | 4 bytes       |   22 bytes    |
/// |--------------------------------------------------------------------|
///
/// CALLTYPE: 1 byte
/// CallType is used to determine how the executeCalldata paramter of the execute function has to be
/// decoded.
/// It can be either single, batch or delegatecall. In the future different calls could be added.
/// CALLTYPE can be used by a validation module to determine how to decode <userOp.callData[36:]>.
///
/// EXECTYPE: 1 byte
/// ExecType is used to determine how the account should handle the execution.
/// It can indicate if the execution should revert on failure or continue execution.
/// In the future more execution modes may be added.
/// Default Behavior (EXECTYPE = 0x00) is to revert on a single failed execution. If one execution in
/// a batch fails, the entire batch is reverted
///
/// UNUSED: 4 bytes
/// Unused bytes are reserved for future use.
///
/// ModeSelector: bytes4
/// The "optional" mode selector can be used by account vendors, to implement custom behavior in
/// their accounts.
/// the way a ModeSelector is to be calculated is bytes4(keccak256("vendorname.featurename"))
/// this is to prevent collisions between different vendors, while allowing innovation and the
/// development of new features without coordination between ERC-7579 implementing accounts
///
/// ModePayload: 22 bytes
/// Mode payload is used to pass additional data to the smart account execution, this may be
/// interpreted depending on the ModeSelector
///
/// ExecutionCallData: n bytes
/// single, delegatecall or batch exec abi.encoded as bytes

// Custom type for improved developer experience
type ExecutionMode is bytes32;

type CallType is bytes1;

type ExecType is bytes1;

type ModeSelector is bytes4;

type ModePayload is bytes22;

// Default CallType
CallType constant CALLTYPE_SINGLE = CallType.wrap(0x00);
// Batched CallType
CallType constant CALLTYPE_BATCH = CallType.wrap(0x01);

CallType constant CALLTYPE_STATIC = CallType.wrap(0xFE);

// @dev Implementing delegatecall is OPTIONAL!
// implement delegatecall with extreme care.
CallType constant CALLTYPE_DELEGATECALL = CallType.wrap(0xFF);

// @dev default behavior is to revert on failure
// To allow very simple accounts to use mode encoding, the default behavior is to revert on failure
// Since this is value 0x00, no additional encoding is required for simple accounts
ExecType constant EXECTYPE_DEFAULT = ExecType.wrap(0x00);
// @dev account may elect to change execution behavior. For example "try exec" / "allow fail"
ExecType constant EXECTYPE_TRY = ExecType.wrap(0x01);

ModeSelector constant MODE_DEFAULT = ModeSelector.wrap(bytes4(0x00000000));
// Example declaration of a custom mode selector
ModeSelector constant MODE_OFFSET = ModeSelector.wrap(bytes4(keccak256("default.mode.offset")));

/// @dev ModeLib is a helper library to encode/decode ModeCodes
library ModeLib {
    function decode(
        ExecutionMode mode
    ) internal pure returns (CallType _calltype, ExecType _execType, ModeSelector _modeSelector, ModePayload _modePayload) {
        assembly {
            _calltype := mode
            _execType := shl(8, mode)
            _modeSelector := shl(48, mode)
            _modePayload := shl(80, mode)
        }
    }

    function decodeBasic(ExecutionMode mode) internal pure returns (CallType _calltype, ExecType _execType) {
        assembly {
            _calltype := mode
            _execType := shl(8, mode)
        }
    }

    function encode(CallType callType, ExecType execType, ModeSelector mode, ModePayload payload) internal pure returns (ExecutionMode) {
        return ExecutionMode.wrap(bytes32(abi.encodePacked(callType, execType, bytes4(0), ModeSelector.unwrap(mode), payload)));
    }

    function encodeSimpleBatch() internal pure returns (ExecutionMode mode) {
        mode = encode(CALLTYPE_BATCH, EXECTYPE_DEFAULT, MODE_DEFAULT, ModePayload.wrap(0x00));
    }

    function encodeSimpleSingle() internal pure returns (ExecutionMode mode) {
        mode = encode(CALLTYPE_SINGLE, EXECTYPE_DEFAULT, MODE_DEFAULT, ModePayload.wrap(0x00));
    }

    function encodeTrySingle() internal pure returns (ExecutionMode mode) {
        mode = encode(CALLTYPE_SINGLE, EXECTYPE_TRY, MODE_DEFAULT, ModePayload.wrap(0x00));
    }

    function encodeTryBatch() internal pure returns (ExecutionMode mode) {
        mode = encode(CALLTYPE_BATCH, EXECTYPE_TRY, MODE_DEFAULT, ModePayload.wrap(0x00));
    }

    function encodeCustom(CallType callType, ExecType execType) internal pure returns (ExecutionMode mode) {
        mode = encode(callType, execType, MODE_DEFAULT, ModePayload.wrap(0x00));
    }

    function getCallType(ExecutionMode mode) internal pure returns (CallType calltype) {
        assembly {
            calltype := mode
        }
    }
}

using { _eqModeSelector as == } for ModeSelector global;
using { _eqCallType as == } for CallType global;
using { _uneqCallType as != } for CallType global;
using { _eqExecType as == } for ExecType global;

function _eqCallType(CallType a, CallType b) pure returns (bool) {
    return CallType.unwrap(a) == CallType.unwrap(b);
}

function _uneqCallType(CallType a, CallType b) pure returns (bool) {
    return CallType.unwrap(a) != CallType.unwrap(b);
}

function _eqExecType(ExecType a, ExecType b) pure returns (bool) {
    return ExecType.unwrap(a) == ExecType.unwrap(b);
}

//slither-disable-next-line dead-code
function _eqModeSelector(ModeSelector a, ModeSelector b) pure returns (bool) {
    return ModeSelector.unwrap(a) == ModeSelector.unwrap(b);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

import { Execution } from "../types/DataTypes.sol";

/// @title ExecutionLib
/// @author zeroknots.eth | rhinestone.wtf
/// Helper Library for decoding Execution calldata
/// malloc for memory allocation is bad for gas. use this assembly instead
library ExecLib {
    error InvalidBatchCallData();

    function get2771CallData(bytes calldata cd) internal view returns (bytes memory callData) {
        /// @solidity memory-safe-assembly
        (cd);
        assembly {
            // as per solidity docs
            function allocate(length) -> pos {
                pos := mload(0x40)
                mstore(0x40, add(pos, length))
            }

            callData := allocate(add(calldatasize(), 0x20)) //allocate extra 0x20 to store length
            mstore(callData, add(calldatasize(), 0x14)) //store length, extra 0x14 is for msg.sender address
            calldatacopy(add(callData, 0x20), 0, calldatasize())

            // The msg.sender address is shifted to the left by 12 bytes to remove the padding
            // Then the address without padding is stored right after the calldata
            let senderPtr := allocate(0x14)
            mstore(senderPtr, shl(96, caller()))
        }
    }

    function decodeBatch(bytes calldata callData) internal view returns (Execution[] calldata executionBatch) {
        /*
         * Batch Call Calldata Layout
         * Offset (in bytes)    | Length (in bytes) | Contents
         * 0x0                  | 0x4               | bytes4 function selector
         * 0x4                  | -                 | abi.encode(IERC7579Execution.Execution[])
         */
        assembly ("memory-safe") {
            let dataPointer := add(callData.offset, calldataload(callData.offset))
            // Extract the ERC7579 Executions
            executionBatch.offset := add(dataPointer, 32)
            executionBatch.length := calldataload(dataPointer)
        }
    }   

    function encodeBatch(Execution[] memory executions) internal pure returns (bytes memory callData) {
        callData = abi.encode(executions);
    }

    function decodeSingle(bytes calldata executionCalldata) internal pure returns (address target, uint256 value, bytes calldata callData) {
        target = address(bytes20(executionCalldata[0:20]));
        value = uint256(bytes32(executionCalldata[20:52]));
        callData = executionCalldata[52:];
    }

    function decodeDelegateCall(bytes calldata executionCalldata) internal pure returns (address delegate, bytes calldata callData) {
        // destructure executionCallData according to single exec
        delegate = address(uint160(bytes20(executionCalldata[0:20])));
        callData = executionCalldata[20:];
    }

    function encodeSingle(address target, uint256 value, bytes memory callData) internal pure returns (bytes memory userOpCalldata) {
        userOpCalldata = abi.encodePacked(target, value, callData);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.27;

library LocalCallDataParserLib {
    /// @dev Parses the `userOp.signature` to extract the module type, module initialization data,
    ///      enable mode signature, and user operation signature. The `userOp.signature` must be
    ///      encoded in a specific way to be parsed correctly.
    /// @param packedData The packed signature data, typically coming from `userOp.signature`.
    /// @return module The address of the module.
    /// @return moduleType The type of module as a `uint256`.
    /// @return moduleInitData Initialization data specific to the module.
    /// @return enableModeSignature Signature used to enable the module mode.
    /// @return userOpSignature The remaining user operation signature data.
    function parseEnableModeData(
        bytes calldata packedData
    )
        internal
        pure
        returns (
            address module,
            uint256 moduleType,
            bytes calldata moduleInitData,
            bytes calldata enableModeSignature,
            bytes calldata userOpSignature
        )
    {
        uint256 p;
        assembly ("memory-safe") {
            p := packedData.offset
            module := shr(96, calldataload(p))

            p := add(p, 0x14)
            moduleType := calldataload(p)

            moduleInitData.length := shr(224, calldataload(add(p, 0x20)))
            moduleInitData.offset := add(p, 0x24)
            p := add(moduleInitData.offset, moduleInitData.length)

            enableModeSignature.length := shr(224, calldataload(p))
            enableModeSignature.offset := add(p, 0x04)
            p := sub(add(enableModeSignature.offset, enableModeSignature.length), packedData.offset)
        }
        userOpSignature = packedData[p:];
    }

    /// @dev Parses the data to obtain types and initdata's for Multi Type module install mode
    /// @param initData Multi Type module init data, abi.encoded
    function parseMultiTypeInitData(bytes calldata initData) internal pure returns (uint256[] calldata types, bytes[] calldata initDatas) {
        // equivalent of:
        // (types, initDatas) = abi.decode(initData,(uint[],bytes[]))
        assembly ("memory-safe") {
            let offset := initData.offset
            let baseOffset := offset
            let dataPointer := add(baseOffset, calldataload(offset))

            types.offset := add(dataPointer, 32)
            types.length := calldataload(dataPointer)
            offset := add(offset, 32)

            dataPointer := add(baseOffset, calldataload(offset))
            initDatas.offset := add(dataPointer, 32)
            initDatas.length := calldataload(dataPointer)
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { CallType } from "../../lib/ModeLib.sol";

/// @title ERC-7579 Module Manager Events and Errors Interface
/// @notice Provides event and error definitions for actions related to module management in smart accounts.
/// @dev Used by IModuleManager to define the events and errors associated with the installation and management of modules.
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IModuleManagerEventsAndErrors {
    /// @notice Emitted when a module is installed onto a smart account.
    /// @param moduleTypeId The identifier for the type of module installed.
    /// @param module The address of the installed module.
    event ModuleInstalled(uint256 moduleTypeId, address module);

    /// @notice Emitted when a module is uninstalled from a smart account.
    /// @param moduleTypeId The identifier for the type of module uninstalled.
    /// @param module The address of the uninstalled module.
    event ModuleUninstalled(uint256 moduleTypeId, address module);

    /// @notice Thrown when attempting to remove the last validator.
    error CanNotRemoveLastValidator();

    /// @dev Thrown when the specified module address is not recognized as valid.
    error ValidatorNotInstalled(address module);

    /// @dev Thrown when there is no installed validator detected.
    error NoValidatorInstalled();

    /// @dev Thrown when the specified module address is not recognized as valid.
    error InvalidModule(address module);

    /// @dev Thrown when an invalid module type identifier is provided.
    error InvalidModuleTypeId(uint256 moduleTypeId);

    /// @dev Thrown when there is an attempt to install a module that is already installed.
    error ModuleAlreadyInstalled(uint256 moduleTypeId, address module);

    /// @dev Thrown when an operation is performed by an unauthorized operator.
    error UnauthorizedOperation(address operator);

    /// @dev Thrown when there is an attempt to uninstall a module that is not installed.
    error ModuleNotInstalled(uint256 moduleTypeId, address module);

    /// @dev Thrown when a module address is set to zero.
    error ModuleAddressCanNotBeZero();

    /// @dev Thrown when a post-check fails after hook execution.
    error HookPostCheckFailed();

    /// @dev Thrown when there is an attempt to install a hook while another is already installed.
    error HookAlreadyInstalled(address currentHook);

    /// @dev Thrown when there is an attempt to install a fallback handler for a selector already having one.
    error FallbackAlreadyInstalledForSelector(bytes4 selector);

    /// @dev Thrown when there is an attempt to uninstall a fallback handler for a selector that does not have one installed.
    error FallbackNotInstalledForSelector(bytes4 selector);

    /// @dev Thrown when a fallback handler fails to uninstall properly.
    error FallbackHandlerUninstallFailed();

    /// @dev Thrown when no fallback handler is available for a given selector.
    error MissingFallbackHandler(bytes4 selector);

    /// @dev Thrown when Invalid data is provided for MultiType install flow
    error InvalidInput();

    /// @dev Thrown when unable to validate Module Enable Mode signature
    error EnableModeSigError();

    /// Error thrown when account installs/uninstalls module with mismatched input `moduleTypeId`
    error MismatchModuleTypeId(uint256 moduleTypeId);

    /// @dev Thrown when there is an attempt to install a forbidden selector as a fallback handler.
    error FallbackSelectorForbidden();

    /// @dev Thrown when there is an attempt to install a fallback handler with an invalid calltype for a given selector.
    error FallbackCallTypeInvalid();

    /// @notice Error thrown when an execution with an unsupported CallType was made.
    /// @param callType The unsupported call type.
    error UnsupportedCallType(CallType callType);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

// Magic value for ERC-1271 valid signature
bytes4 constant ERC1271_MAGICVALUE = 0x1626ba7e;

// Value indicating an invalid ERC-1271 signature
bytes4 constant ERC1271_INVALID = 0xFFFFFFFF;

// Value indicating successful validation
uint256 constant VALIDATION_SUCCESS = 0;

// Value indicating failed validation
uint256 constant VALIDATION_FAILED = 1;

// Module type identifier for Multitype install
uint256 constant MODULE_TYPE_MULTI = 0;

// Module type identifier for validators
uint256 constant MODULE_TYPE_VALIDATOR = 1;

// Module type identifier for executors
uint256 constant MODULE_TYPE_EXECUTOR = 2;

// Module type identifier for fallback handlers
uint256 constant MODULE_TYPE_FALLBACK = 3;

// Module type identifier for hooks
uint256 constant MODULE_TYPE_HOOK = 4;

string constant MODULE_ENABLE_MODE_NOTATION = "ModuleEnableMode(address module,uint256 moduleType,bytes32 userOpHash,bytes32 initDataHash)";
bytes32 constant MODULE_ENABLE_MODE_TYPE_HASH = keccak256(bytes(MODULE_ENABLE_MODE_NOTATION));

// Validation modes
bytes1 constant MODE_VALIDATION = 0x00;
bytes1 constant MODE_MODULE_ENABLE = 0x01;

bytes4 constant SUPPORTS_ERC7739 = 0x77390000;
bytes4 constant SUPPORTS_ERC7739_V1 = 0x77390001;

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Contract for EIP-712 typed structured data hashing and signing.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/EIP712.sol)
/// @author Modified from Solbase (https://github.com/Sol-DAO/solbase/blob/main/src/utils/EIP712.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/EIP712.sol)
///
/// @dev Note, this implementation:
/// - Uses `address(this)` for the `verifyingContract` field.
/// - Does NOT use the optional EIP-712 salt.
/// - Does NOT use any EIP-712 extensions.
/// This is for simplicity and to save gas.
/// If you need to customize, please fork / modify accordingly.
abstract contract EIP712 {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  CONSTANTS AND IMMUTABLES                  */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev `keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")`.
    bytes32 internal constant _DOMAIN_TYPEHASH =
        0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;

    uint256 private immutable _cachedThis;
    uint256 private immutable _cachedChainId;
    bytes32 private immutable _cachedNameHash;
    bytes32 private immutable _cachedVersionHash;
    bytes32 private immutable _cachedDomainSeparator;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CONSTRUCTOR                         */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Cache the hashes for cheaper runtime gas costs.
    /// In the case of upgradeable contracts (i.e. proxies),
    /// or if the chain id changes due to a hard fork,
    /// the domain separator will be seamlessly calculated on-the-fly.
    constructor() {
        _cachedThis = uint256(uint160(address(this)));
        _cachedChainId = block.chainid;

        string memory name;
        string memory version;
        if (!_domainNameAndVersionMayChange()) (name, version) = _domainNameAndVersion();
        bytes32 nameHash = _domainNameAndVersionMayChange() ? bytes32(0) : keccak256(bytes(name));
        bytes32 versionHash =
            _domainNameAndVersionMayChange() ? bytes32(0) : keccak256(bytes(version));
        _cachedNameHash = nameHash;
        _cachedVersionHash = versionHash;

        bytes32 separator;
        if (!_domainNameAndVersionMayChange()) {
            /// @solidity memory-safe-assembly
            assembly {
                let m := mload(0x40) // Load the free memory pointer.
                mstore(m, _DOMAIN_TYPEHASH)
                mstore(add(m, 0x20), nameHash)
                mstore(add(m, 0x40), versionHash)
                mstore(add(m, 0x60), chainid())
                mstore(add(m, 0x80), address())
                separator := keccak256(m, 0xa0)
            }
        }
        _cachedDomainSeparator = separator;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   FUNCTIONS TO OVERRIDE                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Please override this function to return the domain name and version.
    /// ```
    ///     function _domainNameAndVersion()
    ///         internal
    ///         pure
    ///         virtual
    ///         returns (string memory name, string memory version)
    ///     {
    ///         name = "Solady";
    ///         version = "1";
    ///     }
    /// ```
    ///
    /// Note: If the returned result may change after the contract has been deployed,
    /// you must override `_domainNameAndVersionMayChange()` to return true.
    function _domainNameAndVersion()
        internal
        view
        virtual
        returns (string memory name, string memory version);

    /// @dev Returns if `_domainNameAndVersion()` may change
    /// after the contract has been deployed (i.e. after the constructor).
    /// Default: false.
    function _domainNameAndVersionMayChange() internal pure virtual returns (bool result) {}

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     HASHING OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the EIP-712 domain separator.
    function _domainSeparator() internal view virtual returns (bytes32 separator) {
        if (_domainNameAndVersionMayChange()) {
            separator = _buildDomainSeparator();
        } else {
            separator = _cachedDomainSeparator;
            if (_cachedDomainSeparatorInvalidated()) separator = _buildDomainSeparator();
        }
    }

    /// @dev Returns the hash of the fully encoded EIP-712 message for this domain,
    /// given `structHash`, as defined in
    /// https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct.
    ///
    /// The hash can be used together with {ECDSA-recover} to obtain the signer of a message:
    /// ```
    ///     bytes32 digest = _hashTypedData(keccak256(abi.encode(
    ///         keccak256("Mail(address to,string contents)"),
    ///         mailTo,
    ///         keccak256(bytes(mailContents))
    ///     )));
    ///     address signer = ECDSA.recover(digest, signature);
    /// ```
    function _hashTypedData(bytes32 structHash) internal view virtual returns (bytes32 digest) {
        // We will use `digest` to store the domain separator to save a bit of gas.
        if (_domainNameAndVersionMayChange()) {
            digest = _buildDomainSeparator();
        } else {
            digest = _cachedDomainSeparator;
            if (_cachedDomainSeparatorInvalidated()) digest = _buildDomainSeparator();
        }
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the digest.
            mstore(0x00, 0x1901000000000000) // Store "\x19\x01".
            mstore(0x1a, digest) // Store the domain separator.
            mstore(0x3a, structHash) // Store the struct hash.
            digest := keccak256(0x18, 0x42)
            // Restore the part of the free memory slot that was overwritten.
            mstore(0x3a, 0)
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                    EIP-5267 OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev See: https://eips.ethereum.org/EIPS/eip-5267
    function eip712Domain()
        public
        view
        virtual
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        fields = hex"0f"; // `0b01111`.
        (name, version) = _domainNameAndVersion();
        chainId = block.chainid;
        verifyingContract = address(this);
        salt = salt; // `bytes32(0)`.
        extensions = extensions; // `new uint256[](0)`.
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      PRIVATE HELPERS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the EIP-712 domain separator.
    function _buildDomainSeparator() private view returns (bytes32 separator) {
        // We will use `separator` to store the name hash to save a bit of gas.
        bytes32 versionHash;
        if (_domainNameAndVersionMayChange()) {
            (string memory name, string memory version) = _domainNameAndVersion();
            separator = keccak256(bytes(name));
            versionHash = keccak256(bytes(version));
        } else {
            separator = _cachedNameHash;
            versionHash = _cachedVersionHash;
        }
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Load the free memory pointer.
            mstore(m, _DOMAIN_TYPEHASH)
            mstore(add(m, 0x20), separator) // Name hash.
            mstore(add(m, 0x40), versionHash)
            mstore(add(m, 0x60), chainid())
            mstore(add(m, 0x80), address())
            separator := keccak256(m, 0xa0)
        }
    }

    /// @dev Returns if the cached domain separator has been invalidated.
    function _cachedDomainSeparatorInvalidated() private view returns (bool result) {
        uint256 cachedChainId = _cachedChainId;
        uint256 cachedThis = _cachedThis;
        /// @solidity memory-safe-assembly
        assembly {
            result := iszero(and(eq(chainid(), cachedChainId), eq(address(), cachedThis)))
        }
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.7.6;

library ExcessivelySafeCall {
    uint256 constant LOW_28_MASK =
        0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff;

    /// @notice Use when you _really_ really _really_ don't trust the called
    /// contract. This prevents the called contract from causing reversion of
    /// the caller in as many ways as we can.
    /// @dev The main difference between this and a solidity low-level call is
    /// that we limit the number of bytes that the callee can cause to be
    /// copied to caller memory. This prevents stupid things like malicious
    /// contracts returning 10,000,000 bytes causing a local OOG when copying
    /// to memory.
    /// @param _target The address to call
    /// @param _gas The amount of gas to forward to the remote contract
    /// @param _value The value in wei to send to the remote contract
    /// @param _maxCopy The maximum number of bytes of returndata to copy
    /// to memory.
    /// @param _calldata The data to send to the remote contract
    /// @return success and returndata, as `.call()`. Returndata is capped to
    /// `_maxCopy` bytes.
    function excessivelySafeCall(
        address _target,
        uint256 _gas,
        uint256 _value,
        uint16 _maxCopy,
        bytes memory _calldata
    ) internal returns (bool, bytes memory) {
        // set up for assembly call
        uint256 _toCopy;
        bool _success;
        bytes memory _returnData = new bytes(_maxCopy);
        // dispatch message to recipient
        // by assembly calling "handle" function
        // we call via assembly to avoid memcopying a very large returndata
        // returned by a malicious contract
        assembly {
            _success := call(
                _gas, // gas
                _target, // recipient
                _value, // ether value
                add(_calldata, 0x20), // inloc
                mload(_calldata), // inlen
                0, // outloc
                0 // outlen
            )
            // limit our copy to 256 bytes
            _toCopy := returndatasize()
            if gt(_toCopy, _maxCopy) {
                _toCopy := _maxCopy
            }
            // Store the length of the copied bytes
            mstore(_returnData, _toCopy)
            // copy the bytes from returndata[0:_toCopy]
            returndatacopy(add(_returnData, 0x20), 0, _toCopy)
        }
        return (_success, _returnData);
    }

    /// @notice Use when you _really_ really _really_ don't trust the called
    /// contract. This prevents the called contract from causing reversion of
    /// the caller in as many ways as we can.
    /// @dev The main difference between this and a solidity low-level call is
    /// that we limit the number of bytes that the callee can cause to be
    /// copied to caller memory. This prevents stupid things like malicious
    /// contracts returning 10,000,000 bytes causing a local OOG when copying
    /// to memory.
    /// @param _target The address to call
    /// @param _gas The amount of gas to forward to the remote contract
    /// @param _maxCopy The maximum number of bytes of returndata to copy
    /// to memory.
    /// @param _calldata The data to send to the remote contract
    /// @return success and returndata, as `.call()`. Returndata is capped to
    /// `_maxCopy` bytes.
    function excessivelySafeStaticCall(
        address _target,
        uint256 _gas,
        uint16 _maxCopy,
        bytes memory _calldata
    ) internal view returns (bool, bytes memory) {
        // set up for assembly call
        uint256 _toCopy;
        bool _success;
        bytes memory _returnData = new bytes(_maxCopy);
        // dispatch message to recipient
        // by assembly calling "handle" function
        // we call via assembly to avoid memcopying a very large returndata
        // returned by a malicious contract
        assembly {
            _success := staticcall(
                _gas, // gas
                _target, // recipient
                add(_calldata, 0x20), // inloc
                mload(_calldata), // inlen
                0, // outloc
                0 // outlen
            )
            // limit our copy to 256 bytes
            _toCopy := returndatasize()
            if gt(_toCopy, _maxCopy) {
                _toCopy := _maxCopy
            }
            // Store the length of the copied bytes
            mstore(_returnData, _toCopy)
            // copy the bytes from returndata[0:_toCopy]
            returndatacopy(add(_returnData, 0x20), 0, _toCopy)
        }
        return (_success, _returnData);
    }

    /**
     * @notice Swaps function selectors in encoded contract calls
     * @dev Allows reuse of encoded calldata for functions with identical
     * argument types but different names. It simply swaps out the first 4 bytes
     * for the new selector. This function modifies memory in place, and should
     * only be used with caution.
     * @param _newSelector The new 4-byte selector
     * @param _buf The encoded contract args
     */
    function swapSelector(bytes4 _newSelector, bytes memory _buf)
        internal
        pure
    {
        require(_buf.length >= 4);
        uint256 _mask = LOW_28_MASK;
        assembly {
            // load the first word of
            let _word := mload(add(_buf, 0x20))
            // mask out the top 4 bytes
            // /x
            _word := and(_word, _mask)
            _word := or(_newSelector, _word)
            mstore(add(_buf, 0x20), _word)
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

import { IERC7484 } from "../interfaces/IERC7484.sol";

/// @title RegistryAdapter
/// @notice This contract provides an interface for interacting with an ERC-7484 compliant registry.
/// @dev The registry feature is opt-in, allowing the smart account owner to select and trust specific attesters.
abstract contract RegistryAdapter {
    IERC7484 public registry;

    /// @notice Emitted when a new ERC-7484 registry is configured for the account.
    /// @param registry The configured registry contract.
    event ERC7484RegistryConfigured(IERC7484 indexed registry);

    /// @notice Modifier to check if a module meets the required attestations in the registry.
    /// @param module The module to check.
    /// @param moduleType The type of the module to verify in the registry.
    modifier withRegistry(address module, uint256 moduleType) {
        _checkRegistry(module, moduleType);
        _;
    }

    /// @notice Configures the ERC-7484 registry and sets trusted attesters.
    /// @param newRegistry The new registry contract to use.
    /// @param attesters The list of attesters to trust.
    /// @param threshold The number of attestations required.
    function _configureRegistry(IERC7484 newRegistry, address[] calldata attesters, uint8 threshold) internal {
        registry = newRegistry;
        if (address(newRegistry) != address(0)) {
            newRegistry.trustAttesters(threshold, attesters);
        }
        emit ERC7484RegistryConfigured(newRegistry);
    }

    /// @notice Checks the registry to ensure sufficient valid attestations for a module.
    /// @param module The module to check.
    /// @param moduleType The type of the module to verify in the registry.
    /// @dev Reverts if the required attestations are not met.
    function _checkRegistry(address module, uint256 moduleType) internal view {
        IERC7484 moduleRegistry = registry;
        if (address(moduleRegistry) != address(0)) {
            // This will revert if attestations or the threshold are not met.
            moduleRegistry.check(module, moduleType);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

import { SentinelListLib } from "sentinellist/SentinelList.sol";

import { IHook } from "../modules/IHook.sol";
import { CallType } from "../../lib/ModeLib.sol";

/// @title Nexus - IStorage Interface
/// @notice Provides structured storage for Modular Smart Account under the Nexus suite, compliant with ERC-7579 and ERC-4337.
/// @dev Manages structured storage using SentinelListLib for validators and executors, and a mapping for fallback handlers.
/// This interface utilizes ERC-7201 storage location practices to ensure isolated and collision-resistant storage spaces within smart contracts.
/// It is designed to support dynamic execution and modular management strategies essential for advanced smart account architectures.
/// @custom:storage-location erc7201:biconomy.storage.Nexus
/// @author @livingrockrises | Biconomy | [email protected]
/// @author @aboudjem | Biconomy | [email protected]
/// @author @filmakarov | Biconomy | [email protected]
/// @author @zeroknots | Rhinestone.wtf | zeroknots.eth
/// Special thanks to the Solady team for foundational contributions: https://github.com/Vectorized/solady
interface IStorage {
    /// @notice Struct storing validators and executors using Sentinel lists, and fallback handlers via mapping.
    struct AccountStorage {
        SentinelListLib.SentinelList validators; ///< List of validators, initialized upon contract deployment.
        SentinelListLib.SentinelList executors; ///< List of executors, similarly initialized.
        mapping(bytes4 => FallbackHandler) fallbacks; ///< Mapping of selectors to their respective fallback handlers.
        IHook hook; ///< Current hook module associated with this account.
        mapping(address hook => uint256) emergencyUninstallTimelock; ///< Mapping of hooks to requested timelocks.
    }

    /// @notice Defines a fallback handler with an associated handler address and a call type.
    struct FallbackHandler {
        address handler; ///< The address of the fallback function handler.
        CallType calltype; ///< The type of call this handler supports (e.g., static or call).
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.5;

/**
 * User Operation struct
 * @param sender                - The sender account of this request.
 * @param nonce                 - Unique value the sender uses to verify it is not a replay.
 * @param initCode              - If set, the account contract will be created by this constructor/
 * @param callData              - The method call to execute on this account.
 * @param accountGasLimits      - Packed gas limits for validateUserOp and gas limit passed to the callData method call.
 * @param preVerificationGas    - Gas not calculated by the handleOps method, but added to the gas paid.
 *                                Covers batch overhead.
 * @param gasFees               - packed gas fields maxPriorityFeePerGas and maxFeePerGas - Same as EIP-1559 gas parameters.
 * @param paymasterAndData      - If set, this field holds the paymaster address, verification gas limit, postOp gas limit and paymaster-specific extra data
 *                                The paymaster will pay for the transaction instead of the sender.
 * @param signature             - Sender-verified signature over the entire request, the EntryPoint address and the chain ID.
 */
struct PackedUserOperation {
    address sender;
    uint256 nonce;
    bytes initCode;
    bytes callData;
    bytes32 accountGasLimits;
    uint256 preVerificationGas;
    bytes32 gasFees;
    bytes paymasterAndData;
    bytes signature;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

// ──────────────────────────────────────────────────────────────────────────────
//     _   __    _  __
//    / | / /__ | |/ /_  _______
//   /  |/ / _ \|   / / / / ___/
//  / /|  /  __/   / /_/ (__  )
// /_/ |_/\___/_/|_\__,_/____/
//
// ──────────────────────────────────────────────────────────────────────────────
// Nexus: A suite of contracts for Modular Smart Accounts compliant with ERC-7579 and ERC-4337, developed by Biconomy.
// Learn more at https://biconomy.io. To report security issues, please contact us at: [email protected]

/// @title Execution
/// @notice Struct to encapsulate execution data for a transaction
struct Execution {
    /// @notice The target address for the transaction
    address target;
    /// @notice The value in wei to send with the transaction
    uint256 value;
    /// @notice The calldata for the transaction
    bytes callData;
}

{
  "remappings": [
    "@openzeppelin/=node_modules/@openzeppelin/",
    "forge-std/=node_modules/forge-std/src/",
    "account-abstraction/=node_modules/account-abstraction/contracts/",
    "solady/=node_modules/solady/src/",
    "excessively-safe-call/=node_modules/excessively-safe-call/src/",
    "sentinellist/=node_modules/sentinellist/src/",
    "solarray/=node_modules/solarray/src/",
    "erc7739Validator/=node_modules/erc7739-validator-base/src/",
    "@ERC4337/=node_modules/@ERC4337/",
    "@gnosis.pm/=node_modules/@gnosis.pm/",
    "@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/",
    "@prb/=node_modules/@prb/",
    "@prb/math/=node_modules/erc7739-validator-base/node_modules/@prb/math/src/",
    "@rhinestone/=node_modules/@rhinestone/",
    "@safe-global/=node_modules/@safe-global/",
    "@zerodev/=node_modules/@zerodev/",
    "ExcessivelySafeCall/=node_modules/erc7739-validator-base/node_modules/excessively-safe-call/src/",
    "account-abstraction-v0.6/=node_modules/account-abstraction-v0.6/",
    "ds-test/=node_modules/ds-test/",
    "enumerablemap/=node_modules/enumerablemap/",
    "enumerableset4337/=node_modules/erc7739-validator-base/node_modules/enumerablemap/src/",
    "erc4337-validation/=node_modules/erc7739-validator-base/node_modules/@rhinestone/erc4337-validation/src/",
    "erc7579/=node_modules/erc7579/",
    "erc7739-validator-base/=node_modules/erc7739-validator-base/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/",
    "hardhat-deploy/=node_modules/hardhat-deploy/",
    "hardhat/=node_modules/hardhat/",
    "kernel/=node_modules/erc7739-validator-base/node_modules/@zerodev/kernel/src/",
    "module-bases/=node_modules/erc7739-validator-base/node_modules/@rhinestone/module-bases/src/",
    "modulekit/=node_modules/modulekit/",
    "registry/=node_modules/modulekit/node_modules/@rhinestone/registry/src/",
    "safe7579/=node_modules/erc7739-validator-base/node_modules/@rhinestone/safe7579/src/",
    "stringutils/=node_modules/stringutils/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 999
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IERC7484","name":"registry","type":"address"},{"internalType":"address[]","name":"attesters","type":"address[]"},{"internalType":"uint8","name":"threshold","type":"uint8"}],"name":"initNexus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"module","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct BootstrapConfig[]","name":"validators","type":"tuple[]"},{"components":[{"internalType":"address","name":"module","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct BootstrapConfig","name":"hook","type":"tuple"},{"internalType":"contract IERC7484","name":"registry","type":"address"},{"internalType":"address[]","name":"attesters","type":"address[]"},{"internalType":"uint8","name":"threshold","type":"uint8"}],"name":"initNexusScoped","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IModule","name":"validator","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"contract IERC7484","name":"registry","type":"address"},{"internalType":"address[]","name":"attesters","type":"address[]"},{"internalType":"uint8","name":"threshold","type":"uint8"}],"name":"initNexusWithSingleValidator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"registry","outputs":[{"internalType":"contract IERC7484","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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