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// SPDX-FileCopyrightText: 2023 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.6;

import "TrustedCaller.sol";
import "EVMScriptCreator.sol";
import "IEVMScriptFactory.sol";
import "INodeOperatorsRegistry.sol";
import "IACL.sol";

/// @notice Creates EVMScript to change signing keys manager for several node operators
contract ChangeNodeOperatorManagers is TrustedCaller, IEVMScriptFactory {
    struct ChangeNodeOperatorManagersInput {
        uint256 nodeOperatorId;
        address oldManagerAddress;
        address newManagerAddress;
    }

    // -------------
    // CONSTANTS
    // -------------

    bytes32 private constant MANAGE_SIGNING_KEYS_ROLE = keccak256("MANAGE_SIGNING_KEYS");
    bytes4 private constant GRANT_PERMISSION_P_SELECTOR =
        bytes4(keccak256("grantPermissionP(address,address,bytes32,uint256[])"));
    bytes4 private constant REVOKE_PERMISSION_SELECTOR =
        bytes4(keccak256("revokePermission(address,address,bytes32)"));

    // -------------
    // ERRORS
    // -------------

    string private constant ERROR_NODE_OPERATOR_INDEX_OUT_OF_RANGE =
        "NODE_OPERATOR_INDEX_OUT_OF_RANGE";
    string private constant ERROR_OLD_MANAGER_HAS_NO_ROLE = "OLD_MANAGER_HAS_NO_ROLE";
    string private constant ERROR_MANAGER_ALREADY_HAS_ROLE = "MANAGER_ALREADY_HAS_ROLE";
    string private constant ERROR_MANAGER_ADDRESSES_HAS_DUPLICATE =
        "MANAGER_ADDRESSES_HAS_DUPLICATE";
    string private constant ERROR_NODE_OPERATORS_IS_NOT_SORTED = "NODE_OPERATORS_IS_NOT_SORTED";
    string private constant ERROR_ZERO_MANAGER_ADDRESS = "ZERO_MANAGER_ADDRESS";
    string private constant ERROR_EMPTY_CALLDATA = "EMPTY_CALLDATA";

    // -------------
    // VARIABLES
    // -------------

    /// @notice Address of NodeOperatorsRegistry contract
    INodeOperatorsRegistry public immutable nodeOperatorsRegistry;
    /// @notice Address of Aragon ACL contract
    IACL public immutable acl;

    // -------------
    // CONSTRUCTOR
    // -------------

    constructor(
        address _trustedCaller,
        address _nodeOperatorsRegistry,
        address _acl
    ) TrustedCaller(_trustedCaller) {
        nodeOperatorsRegistry = INodeOperatorsRegistry(_nodeOperatorsRegistry);
        acl = IACL(_acl);
    }

    // -------------
    // EXTERNAL METHODS
    // -------------

    /// @notice Creates EVMScript to change managers of several node operators
    /// @param _creator Address who creates EVMScript
    /// @param _evmScriptCallData Encoded (ChangeNodeOperatorManagersInput[])
    function createEVMScript(
        address _creator,
        bytes memory _evmScriptCallData
    ) external view override onlyTrustedCaller(_creator) returns (bytes memory) {
        ChangeNodeOperatorManagersInput[] memory decodedCallData = _decodeEVMScriptCallData(
            _evmScriptCallData
        );

        bytes4[] memory methodIds = new bytes4[](decodedCallData.length * 2);
        bytes[] memory encodedCalldata = new bytes[](decodedCallData.length * 2);

        _validateInputData(decodedCallData);

        for (uint256 i = 0; i < decodedCallData.length; ++i) {
            methodIds[i * 2] = REVOKE_PERMISSION_SELECTOR;
            encodedCalldata[i * 2] = abi.encode(
                decodedCallData[i].oldManagerAddress,
                address(nodeOperatorsRegistry),
                MANAGE_SIGNING_KEYS_ROLE
            );

            // See https://legacy-docs.aragon.org/developers/tools/aragonos/reference-aragonos-3#parameter-interpretation for details
            uint256[] memory permissionParams = new uint256[](1);
            permissionParams[0] = (1 << 240) + decodedCallData[i].nodeOperatorId;
            methodIds[i * 2 + 1] = GRANT_PERMISSION_P_SELECTOR;
            encodedCalldata[i * 2 + 1] = abi.encode(
                decodedCallData[i].newManagerAddress,
                address(nodeOperatorsRegistry),
                MANAGE_SIGNING_KEYS_ROLE,
                permissionParams
            );
        }

        return EVMScriptCreator.createEVMScript(address(acl), methodIds, encodedCalldata);
    }

    /// @notice Decodes call data used by createEVMScript method
    /// @param _evmScriptCallData Encoded (ChangeNodeOperatorManagersInput[])
    /// @return ChangeNodeOperatorManagersInput[]
    function decodeEVMScriptCallData(
        bytes memory _evmScriptCallData
    ) external pure returns (ChangeNodeOperatorManagersInput[] memory) {
        return _decodeEVMScriptCallData(_evmScriptCallData);
    }

    // ------------------
    // PRIVATE METHODS
    // ------------------

    function _decodeEVMScriptCallData(
        bytes memory _evmScriptCallData
    ) private pure returns (ChangeNodeOperatorManagersInput[] memory) {
        return abi.decode(_evmScriptCallData, (ChangeNodeOperatorManagersInput[]));
    }

    function _validateInputData(
        ChangeNodeOperatorManagersInput[] memory _decodedCallData
    ) private view {
        uint256 nodeOperatorsCount = nodeOperatorsRegistry.getNodeOperatorsCount();
        require(_decodedCallData.length > 0, ERROR_EMPTY_CALLDATA);
        require(
            _decodedCallData[_decodedCallData.length - 1].nodeOperatorId < nodeOperatorsCount,
            ERROR_NODE_OPERATOR_INDEX_OUT_OF_RANGE
        );

        for (uint256 i = 0; i < _decodedCallData.length; ++i) {
            require(
                i == 0 ||
                    _decodedCallData[i].nodeOperatorId > _decodedCallData[i - 1].nodeOperatorId,
                ERROR_NODE_OPERATORS_IS_NOT_SORTED
            );

            address managerAddress = _decodedCallData[i].newManagerAddress;
            for (uint256 testIndex = i + 1; testIndex < _decodedCallData.length; ++testIndex) {
                require(
                    managerAddress != _decodedCallData[testIndex].newManagerAddress,
                    ERROR_MANAGER_ADDRESSES_HAS_DUPLICATE
                );
            }
            require(
                acl.getPermissionParamsLength(
                    _decodedCallData[i].oldManagerAddress,
                    address(nodeOperatorsRegistry),
                    MANAGE_SIGNING_KEYS_ROLE
                ) == 1,
                ERROR_OLD_MANAGER_HAS_NO_ROLE
            );

            // See https://legacy-docs.aragon.org/developers/tools/aragonos/reference-aragonos-3#parameter-interpretation for details
            (uint8 paramIndex, uint8 paramOp, uint240 param) = acl.getPermissionParam(
                _decodedCallData[i].oldManagerAddress,
                address(nodeOperatorsRegistry),
                MANAGE_SIGNING_KEYS_ROLE,
                0
            );

            require(paramIndex == 0, ERROR_OLD_MANAGER_HAS_NO_ROLE);
            require(paramOp == 1, ERROR_OLD_MANAGER_HAS_NO_ROLE);
            require(param == _decodedCallData[i].nodeOperatorId, ERROR_OLD_MANAGER_HAS_NO_ROLE);

            require(
                _decodedCallData[i].newManagerAddress != address(0),
                ERROR_ZERO_MANAGER_ADDRESS
            );

            require(
                acl.hasPermission(
                    _decodedCallData[i].newManagerAddress,
                    address(nodeOperatorsRegistry),
                    MANAGE_SIGNING_KEYS_ROLE
                ) == false,
                ERROR_MANAGER_ALREADY_HAS_ROLE
            );
            require(
                acl.getPermissionParamsLength(
                    _decodedCallData[i].newManagerAddress,
                    address(nodeOperatorsRegistry),
                    MANAGE_SIGNING_KEYS_ROLE
                ) == 0,
                ERROR_MANAGER_ALREADY_HAS_ROLE
            );
        }
    }
}

// SPDX-FileCopyrightText: 2021 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

/// @author psirex
/// @notice A helper contract contains logic to validate that only a trusted caller has access to certain methods.
/// @dev Trusted caller set once on deployment and can't be changed.
contract TrustedCaller {
    string private constant ERROR_TRUSTED_CALLER_IS_ZERO_ADDRESS = "TRUSTED_CALLER_IS_ZERO_ADDRESS";
    string private constant ERROR_CALLER_IS_FORBIDDEN = "CALLER_IS_FORBIDDEN";

    address public immutable trustedCaller;

    constructor(address _trustedCaller) {
        require(_trustedCaller != address(0), ERROR_TRUSTED_CALLER_IS_ZERO_ADDRESS);
        trustedCaller = _trustedCaller;
    }

    modifier onlyTrustedCaller(address _caller) {
        require(_caller == trustedCaller, ERROR_CALLER_IS_FORBIDDEN);
        _;
    }
}

// SPDX-FileCopyrightText: 2021 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

/// @author psirex
/// @notice Contains methods for convenient creation
/// of EVMScripts in EVMScript factories contracts
library EVMScriptCreator {
    // Id of default CallsScript Aragon's executor.
    bytes4 private constant SPEC_ID = hex"00000001";

    /// @notice Encodes one method call as EVMScript
    function createEVMScript(
        address _to,
        bytes4 _methodId,
        bytes memory _evmScriptCallData
    ) internal pure returns (bytes memory _commands) {
        return
            abi.encodePacked(
                SPEC_ID,
                _to,
                uint32(_evmScriptCallData.length) + 4,
                _methodId,
                _evmScriptCallData
            );
    }

    /// @notice Encodes multiple calls of the same method on one contract as EVMScript
    function createEVMScript(
        address _to,
        bytes4 _methodId,
        bytes[] memory _evmScriptCallData
    ) internal pure returns (bytes memory _evmScript) {
        for (uint256 i = 0; i < _evmScriptCallData.length; ++i) {
            _evmScript = bytes.concat(
                _evmScript,
                abi.encodePacked(
                    _to,
                    uint32(_evmScriptCallData[i].length) + 4,
                    _methodId,
                    _evmScriptCallData[i]
                )
            );
        }
        _evmScript = bytes.concat(SPEC_ID, _evmScript);
    }

    /// @notice Encodes multiple calls to different methods within the same contract as EVMScript
    function createEVMScript(
        address _to,
        bytes4[] memory _methodIds,
        bytes[] memory _evmScriptCallData
    ) internal pure returns (bytes memory _evmScript) {
        require(_methodIds.length == _evmScriptCallData.length, "LENGTH_MISMATCH");

        for (uint256 i = 0; i < _methodIds.length; ++i) {
            _evmScript = bytes.concat(
                _evmScript,
                abi.encodePacked(
                    _to,
                    uint32(_evmScriptCallData[i].length) + 4,
                    _methodIds[i],
                    _evmScriptCallData[i]
                )
            );
        }
        _evmScript = bytes.concat(SPEC_ID, _evmScript);
    }

    /// @notice Encodes multiple calls to different contracts as EVMScript
    function createEVMScript(
        address[] memory _to,
        bytes4[] memory _methodIds,
        bytes[] memory _evmScriptCallData
    ) internal pure returns (bytes memory _evmScript) {
        require(_to.length == _methodIds.length, "LENGTH_MISMATCH");
        require(_to.length == _evmScriptCallData.length, "LENGTH_MISMATCH");

        for (uint256 i = 0; i < _to.length; ++i) {
            _evmScript = bytes.concat(
                _evmScript,
                abi.encodePacked(
                    _to[i],
                    uint32(_evmScriptCallData[i].length) + 4,
                    _methodIds[i],
                    _evmScriptCallData[i]
                )
            );
        }
        _evmScript = bytes.concat(SPEC_ID, _evmScript);
    }
}

// SPDX-FileCopyrightText: 2021 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

/// @author psirex
/// @notice Interface which every EVMScript factory used in EasyTrack contract has to implement
interface IEVMScriptFactory {
    function createEVMScript(address _creator, bytes memory _evmScriptCallData)
        external
        returns (bytes memory);
}

// SPDX-FileCopyrightText: 2023 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

/// @author bulbozaur
interface INodeOperatorsRegistry {
    function activateNodeOperator(uint256 _nodeOperatorId) external;

    function deactivateNodeOperator(uint256 _nodeOperatorId) external;

    function getNodeOperatorIsActive(uint256 _nodeOperatorId) external view returns (bool);

    function getNodeOperatorsCount() external view returns (uint256);

    function addNodeOperator(
        string memory _name,
        address _rewardAddress
    ) external returns (uint256 id);

    function MAX_NODE_OPERATOR_NAME_LENGTH() external view returns (uint256);

    function MAX_NODE_OPERATORS_COUNT() external view returns (uint256);

    function setNodeOperatorRewardAddress(uint256 _nodeOperatorId, address _rewardAddress) external;

    function setNodeOperatorName(uint256 _nodeOperatorId, string memory _name) external;

    function getNodeOperator(
        uint256 _id,
        bool _fullInfo
    )
        external
        view
        returns (
            bool active,
            string memory name,
            address rewardAddress,
            uint64 stakingLimit,
            uint64 stoppedValidators,
            uint64 totalSigningKeys,
            uint64 usedSigningKeys
        );

    function canPerform(
        address _sender,
        bytes32 _role,
        uint256[] memory _params
    ) external view returns (bool);

    function setNodeOperatorStakingLimit(uint256 _id, uint64 _stakingLimit) external;

    function updateTargetValidatorsLimits(
        uint256 _nodeOperatorId,
        bool _isTargetLimitActive,
        uint256 _targetLimit
    ) external;
}

// SPDX-FileCopyrightText: 2023 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

interface IACL {
    function grantPermissionP(
        address _entity,
        address _app,
        bytes32 _role,
        uint256[] memory _params
    ) external;

    function revokePermission(address _entity, address _app, bytes32 _role) external;

    function hasPermission(
        address _entity,
        address _app,
        bytes32 _role
    ) external view returns (bool);

    function hasPermission(
        address _entity,
        address _app,
        bytes32 _role,
        uint256[] memory _params
    ) external view returns (bool);

    function getPermissionParamsLength(
        address _entity,
        address _app,
        bytes32 _role
    ) external view returns (uint256);

    function getPermissionParam(
        address _entity,
        address _app,
        bytes32 _role,
        uint256 _index
    ) external view returns (uint8, uint8, uint240);

    function getPermissionManager(address _app, bytes32 _role) external view returns (address);

    function removePermissionManager(address _app, bytes32 _role) external;
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "ChangeNodeOperatorManagers.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[{"internalType":"address","name":"_trustedCaller","type":"address"},{"internalType":"address","name":"_nodeOperatorsRegistry","type":"address"},{"internalType":"address","name":"_acl","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"acl","outputs":[{"internalType":"contract IACL","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_creator","type":"address"},{"internalType":"bytes","name":"_evmScriptCallData","type":"bytes"}],"name":"createEVMScript","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"_evmScriptCallData","type":"bytes"}],"name":"decodeEVMScriptCallData","outputs":[{"components":[{"internalType":"uint256","name":"nodeOperatorId","type":"uint256"},{"internalType":"address","name":"oldManagerAddress","type":"address"},{"internalType":"address","name":"newManagerAddress","type":"address"}],"internalType":"struct ChangeNodeOperatorManagers.ChangeNodeOperatorManagersInput[]","name":"","type":"tuple[]"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"nodeOperatorsRegistry","outputs":[{"internalType":"contract INodeOperatorsRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"trustedCaller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000008637515e85a4633e23dfc7861e2a9f53af640f7000000000000000000000000ae7b191a31f627b4eb1d4dac64eab9976995b4330000000000000000000000009895f0f17cc1d1891b6f18ee0b483b6f221b37bb

-----Decoded View---------------
Arg [0] : _trustedCaller (address): 0x08637515E85A4633E23dfc7861e2A9f53af640f7
Arg [1] : _nodeOperatorsRegistry (address): 0xaE7B191A31f627b4eB1d4DaC64eaB9976995b433
Arg [2] : _acl (address): 0x9895F0F17cc1d1891b6f18ee0b483B6f221b37Bb

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000008637515e85a4633e23dfc7861e2a9f53af640f7
Arg [1] : 000000000000000000000000ae7b191a31f627b4eb1d4dac64eab9976995b433
Arg [2] : 0000000000000000000000009895f0f17cc1d1891b6f18ee0b483b6f221b37bb