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// SPDX-FileCopyrightText: 2025 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.6;

import "contracts/TrustedCaller.sol";
import "contracts/libraries/EVMScriptCreator.sol";
import "contracts/interfaces/IEVMScriptFactory.sol";
import "contracts/interfaces/IMEVBoostRelayAllowedList.sol";
import "contracts/libraries/MEVBoostRelaysInputUtils.sol";

/// @author katamarinaki, swissarmytowel
/// @notice Creates EVMScript to add new MEV boost relay to MEV Boost relay allowed list
contract AddMEVBoostRelays is TrustedCaller, IEVMScriptFactory {
    // -------------
    // ERRORS
    // -------------

    string private constant ERROR_MAX_NUM_RELAYS_EXCEEDED = "MAX_NUM_RELAYS_EXCEEDED";

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

    /// @notice Limit on the number of relays in the registry based on the value from the MEVBoostRelayAllowedList
    uint256 private constant MAX_NUM_RELAYS = 40;

    /// @notice Selector for the add_relay method in the MEVBoostRelayAllowedList
    bytes4 private constant ADD_RELAY_SELECTOR =
        bytes4(keccak256("add_relay(string,string,bool,string)"));

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

    /// @notice Address of MEVBoostRelayAllowedList contract
    IMEVBoostRelayAllowedList public immutable mevBoostRelayAllowedList;

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

    constructor(
        address _trustedCaller,
        address _mevBoostRelayAllowedList
    ) TrustedCaller(_trustedCaller) {
        mevBoostRelayAllowedList = IMEVBoostRelayAllowedList(_mevBoostRelayAllowedList);
    }

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

    /// @notice Creates EVMScript to add new MEV boost relay to MEV Boost relay allowed list
    /// @param _creator Address who creates EVMScript
    /// @param _evmScriptCallData Encoded relays data: IMEVBoostRelayAllowedList.Relay[]
    function createEVMScript(
        address _creator,
        bytes memory _evmScriptCallData
    ) external view override onlyTrustedCaller(_creator) returns (bytes memory) {
        IMEVBoostRelayAllowedList.Relay[] memory _relaysToAdd = MEVBoostRelaysInputUtils
            .decodeCallDataWithRelayStructs(_evmScriptCallData);
        IMEVBoostRelayAllowedList.Relay[] memory _currentAllowedRelays = mevBoostRelayAllowedList
            .get_relays();

        require(
            _currentAllowedRelays.length + _relaysToAdd.length <= MAX_NUM_RELAYS,
            ERROR_MAX_NUM_RELAYS_EXCEEDED
        );

        // Validate the input data before creating EVMScript to add new relays. The relay URIs MUST NOT be already in the list.
        MEVBoostRelaysInputUtils.validateRelays(_relaysToAdd, _currentAllowedRelays, false);

        uint256 newRelaysCount = _relaysToAdd.length;
        bytes[] memory encodedCalldata = new bytes[](newRelaysCount);

        for (uint256 i; i < newRelaysCount; ) {
            encodedCalldata[i] = abi.encode(
                _relaysToAdd[i].uri,
                _relaysToAdd[i].operator,
                _relaysToAdd[i].is_mandatory,
                _relaysToAdd[i].description
            );

            unchecked {
                ++i;
            }
        }

        return
            EVMScriptCreator.createEVMScript(
                address(mevBoostRelayAllowedList),
                ADD_RELAY_SELECTOR,
                encodedCalldata
            );
    }

    /// @notice Decodes call data used by createEVMScript method
    /// @param _evmScriptCallData Encoded relays data: IMEVBoostRelayAllowedList.Relay[]
    /// @return relays IMEVBoostRelayAllowedList.Relay[]
    function decodeEVMScriptCallData(
        bytes calldata _evmScriptCallData
    ) external pure returns (IMEVBoostRelayAllowedList.Relay[] memory relays) {
        return MEVBoostRelaysInputUtils.decodeCallDataWithRelayStructs(_evmScriptCallData);
    }
}

// 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: 2025 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.6;

/// @title Lido's MEV Boost Relay Allowed List interface
interface IMEVBoostRelayAllowedList {
    struct Relay {
        string uri;
        string operator;
        bool is_mandatory;
        string description;
    }

    // View Functions
    function get_relays() external view returns (Relay[] memory);

    // State-Changing Functions
    function add_relay(
        string memory uri,
        string memory operator,
        bool is_mandatory,
        string memory description
    ) external;

    function remove_relay(string memory uri) external;
}

// SPDX-FileCopyrightText: 2025 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.6;

import "contracts/interfaces/IMEVBoostRelayAllowedList.sol";

/// @author swissarmytowel
/// @notice Utility functions for validating and decoding MEV Boost relay input data
library MEVBoostRelaysInputUtils {
    // -------------
    // ERRORS
    // -------------
    string private constant ERROR_EMPTY_RELAYS_ARRAY = "EMPTY_RELAYS_ARRAY";
    string private constant ERROR_EMPTY_RELAY_URI = "EMPTY_RELAY_URI";
    string private constant ERROR_MAX_STRING_LENGTH_EXCEEDED = "MAX_STRING_LENGTH_EXCEEDED";
    string private constant ERROR_RELAY_URI_ALREADY_EXISTS = "RELAY_URI_ALREADY_EXISTS";
    string private constant ERROR_RELAY_NOT_FOUND = "RELAY_NOT_FOUND";
    string private constant ERROR_DUPLICATE_RELAY_URI = "DUPLICATE_RELAY_URI";

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

    /// @notice Maximum length of a string defined in the MEVBoostRelayAllowedList contract
    uint256 private constant MAX_STRING_LENGTH = 1024;

    // ========================================================
    // Dedicated Validation Functions for Each Operation
    // ========================================================

    /// @notice Validates an array of relay structs
    /// @param _relays Array of Relay structs to validate
    /// @param _currentAllowedRelays Current list of allowed relays from the MEVBoostRelayAllowedList contract
    /// @param _expectExistence Switches the expected existence of the relay URIs in the current relay list
    ///                         if true, the relay URIs should exist in the current relay list and will revert otherwise
    ///                         if false, the relay URIs should NOT exist in the current relay list and will revert otherwise
    function validateRelays(
        IMEVBoostRelayAllowedList.Relay[] memory _relays,
        IMEVBoostRelayAllowedList.Relay[] memory _currentAllowedRelays,
        bool _expectExistence
    ) internal pure {
        uint256 relaysCount = _relays.length;

        require(relaysCount > 0, ERROR_EMPTY_RELAYS_ARRAY);

        for (uint256 i; i < relaysCount; ) {
            IMEVBoostRelayAllowedList.Relay memory relay = _relays[i];
            // Validate the Relay parameters: URI, operator, and description
            uint256 relayURILength = bytes(relay.uri).length;

            require(relayURILength > 0, ERROR_EMPTY_RELAY_URI);
            require(relayURILength <= MAX_STRING_LENGTH, ERROR_MAX_STRING_LENGTH_EXCEEDED);
            require(
                bytes(relay.operator).length <= MAX_STRING_LENGTH,
                ERROR_MAX_STRING_LENGTH_EXCEEDED
            );
            require(
                bytes(relay.description).length <= MAX_STRING_LENGTH,
                ERROR_MAX_STRING_LENGTH_EXCEEDED
            );

            _validateNoDuplicateInputFromIndex(i, _relays);

            bool relayExistsInList = _isRelayURIContained(
                bytes(_relays[i].uri),
                _currentAllowedRelays
            );

            if (_expectExistence) {
                require(relayExistsInList, ERROR_RELAY_NOT_FOUND);
            } else {
                require(!relayExistsInList, ERROR_RELAY_URI_ALREADY_EXISTS);
            }

            unchecked {
                ++i;
            }
        }
    }

    /// @notice Validates an array of relays by their URI strings
    /// @param _relayURIs Array of Relay URI strings to validate
    /// @param _currentAllowedRelays Current list of allowed relays from the MEVBoostRelayAllowedList contract
    function validateRelayURIs(
        string[] memory _relayURIs,
        IMEVBoostRelayAllowedList.Relay[] memory _currentAllowedRelays
    ) internal pure {
        require(_relayURIs.length > 0, ERROR_EMPTY_RELAYS_ARRAY);

        uint256 relayURIsCount = _relayURIs.length;

        for (uint256 i; i < relayURIsCount; ) {
            bytes memory uri = bytes(_relayURIs[i]);

            // Validate the URI length and presence
            require(uri.length > 0, ERROR_EMPTY_RELAY_URI);
            require(uri.length <= MAX_STRING_LENGTH, ERROR_MAX_STRING_LENGTH_EXCEEDED);

            _validateNoDuplicateInputFromIndex(i, _relayURIs);

            bool relayExistsInList = _isRelayURIContained(uri, _currentAllowedRelays);
            // This validation is only used for removing relays, so the relay should exist in the list
            require(relayExistsInList, ERROR_RELAY_NOT_FOUND);

            unchecked {
                ++i;
            }
        }
    }

    /// @notice Decodes the call data for a relay struct array
    /// @param _evmScriptCallData Encoded relay struct array
    /// @return Array of Relay structs decoded from the call data
    function decodeCallDataWithRelayStructs(
        bytes memory _evmScriptCallData
    ) internal pure returns (IMEVBoostRelayAllowedList.Relay[] memory) {
        return abi.decode(_evmScriptCallData, (IMEVBoostRelayAllowedList.Relay[]));
    }

    /// @notice Decodes the call data for a relay URI string array
    /// @param _evmScriptCallData Encoded relay URI string array
    /// @return Array of relay URIs decoded from the call data
    function decodeCallDataWithRelayURIs(
        bytes memory _evmScriptCallData
    ) internal pure returns (string[] memory) {
        return abi.decode(_evmScriptCallData, (string[]));
    }

    // ========================================================
    // Private Helper Functions
    // ========================================================

    /// @dev Asserts that a relay URI exists or not in the current relay list according to the expected condition
    function _isRelayURIContained(
        bytes memory _uri,
        IMEVBoostRelayAllowedList.Relay[] memory _currentAllowedRelays
    ) private pure returns (bool exists) {
        uint256 currentAllowedRelaysLength = _currentAllowedRelays.length;
        bytes32 uriHash = keccak256(_uri);

        for (uint256 j; j < currentAllowedRelaysLength; ) {
            if (keccak256(bytes(_currentAllowedRelays[j].uri)) == uriHash) {
                exists = true;
                break;
            }

            unchecked {
                ++j;
            }
        }
    }

    /// @dev Checks for duplicate URIs in a string array of URIs
    ///      Starts checking from the current relay index to optimize gas usage
    function _validateNoDuplicateInputFromIndex(
        uint256 _currentRelayIndex,
        string[] memory _relayURIs
    ) private pure {
        bytes32 currentURIHash = keccak256(bytes(_relayURIs[_currentRelayIndex]));

        for (uint256 i = _currentRelayIndex + 1; i < _relayURIs.length; ) {
            require(keccak256(bytes(_relayURIs[i])) != currentURIHash, ERROR_DUPLICATE_RELAY_URI);

            unchecked {
                ++i;
            }
        }
    }

    /// @dev Checks for duplicate URIs in a Relay struct array
    ///      Starts checking from the current relay index to optimize gas usage
    function _validateNoDuplicateInputFromIndex(
        uint256 _currentRelayIndex,
        IMEVBoostRelayAllowedList.Relay[] memory _relays
    ) private pure {
        bytes32 currentURIHash = keccak256(bytes(_relays[_currentRelayIndex].uri));

        for (uint256 i = _currentRelayIndex + 1; i < _relays.length; ) {
            require(keccak256(bytes(_relays[i].uri)) != currentURIHash, ERROR_DUPLICATE_RELAY_URI);

            unchecked {
                ++i;
            }
        }
    }
}

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

[{"inputs":[{"internalType":"address","name":"_trustedCaller","type":"address"},{"internalType":"address","name":"_mevBoostRelayAllowedList","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"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":"string","name":"uri","type":"string"},{"internalType":"string","name":"operator","type":"string"},{"internalType":"bool","name":"is_mandatory","type":"bool"},{"internalType":"string","name":"description","type":"string"}],"internalType":"struct IMEVBoostRelayAllowedList.Relay[]","name":"relays","type":"tuple[]"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"mevBoostRelayAllowedList","outputs":[{"internalType":"contract IMEVBoostRelayAllowedList","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"trustedCaller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000418b816a7c3eca151a31d98e30aa7daa33abf83a000000000000000000000000279d3a456212a1294daed0faee98675a52e8a4bf

-----Decoded View---------------
Arg [0] : _trustedCaller (address): 0x418B816A7c3ecA151A31d98e30aa7DAa33aBf83A
Arg [1] : _mevBoostRelayAllowedList (address): 0x279d3A456212a1294DaEd0faEE98675a52E8A4Bf

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000418b816a7c3eca151a31d98e30aa7daa33abf83a
Arg [1] : 000000000000000000000000279d3a456212a1294daed0faee98675a52e8a4bf