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// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

import { AggregatorV3Interface } from "chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import { ReentrancyGuard } from "openzeppelin-contracts/contracts/security/ReentrancyGuard.sol";

import { ICyberIdMiddleware } from "../../interfaces/ICyberIdMiddleware.sol";
import { ITokenReceiver } from "../../interfaces/ITokenReceiver.sol";

import { DataTypes } from "../../libraries/DataTypes.sol";

import { LowerCaseCyberIdMiddleware } from "./base/LowerCaseCyberIdMiddleware.sol";
import { EIP712 } from "../../base/EIP712.sol";

contract PermissionedStableFeeMiddleware is
    LowerCaseCyberIdMiddleware,
    EIP712,
    ReentrancyGuard
{
    /*//////////////////////////////////////////////////////////////
                            STORAGE
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice ETH/USD Oracle address.
     */
    AggregatorV3Interface public immutable usdOracle;

    /**
     * @notice TokenReceiver contract address.
     */
    ITokenReceiver public immutable tokenReceiver;

    /**
     * If true, the middleware will charge the fee to token receiver.
     */
    bool public rebateEnabled;

    /**
     * @notice The address that receives the fee.
     */
    address public recipient;

    /**
     * @notice The price of each letter in USD.
     */
    uint256 public price1Letter;
    uint256 public price2Letter;
    uint256 public price3Letter;
    uint256 public price4Letter;
    uint256 public price5Letter;
    uint256 public price6Letter;
    uint256 public price7To11Letter;
    uint256 public price12AndMoreLetter;

    /**
     * @notice Signer that approve meta transactions.
     */
    address public signer;

    /**
     * @notice User nonces that prevents signature replay.
     */
    mapping(address => uint256) public nonces;

    bytes32 internal constant _REGISTER_TYPEHASH =
        keccak256(
            "register(string cid,address to,uint256 nonce,uint256 deadline,bool free)"
        );

    /*//////////////////////////////////////////////////////////////
                            EVENTS
    //////////////////////////////////////////////////////////////*/

    event SignerChanged(address indexed signer);

    event StableFeeChanged(
        bool rebateEnabled,
        address indexed recipient,
        uint256 price1Letter,
        uint256 price2Letter,
        uint256 price3Letter,
        uint256 price4Letter,
        uint256 price5Letter,
        uint256 price6Letter,
        uint256 price7To11Letter,
        uint256 price12AndMoreLetter
    );

    /*//////////////////////////////////////////////////////////////
                            CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        address _oracleAddress,
        address _tokenReceiver,
        address cyberId
    ) LowerCaseCyberIdMiddleware(cyberId) {
        usdOracle = AggregatorV3Interface(_oracleAddress);
        tokenReceiver = ITokenReceiver(_tokenReceiver);
    }

    /*//////////////////////////////////////////////////////////////
                    ICyberIdMiddleware OVERRIDES
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc ICyberIdMiddleware
    function setMwData(bytes calldata data) external override onlyNameRegistry {
        (
            bool _rebateEnabled,
            address newSigner,
            address _recipient,
            uint256[8] memory prices
        ) = abi.decode(data, (bool, address, address, uint256[8]));
        require(newSigner != address(0), "INVALID_SIGNER");
        signer = newSigner;
        rebateEnabled = _rebateEnabled;
        emit SignerChanged(signer);
        recipient = _recipient;
        price1Letter = prices[0];
        price2Letter = prices[1];
        price3Letter = prices[2];
        price4Letter = prices[3];
        price5Letter = prices[4];
        price6Letter = prices[5];
        price7To11Letter = prices[6];
        price12AndMoreLetter = prices[7];
        emit StableFeeChanged(
            _rebateEnabled,
            _recipient,
            prices[0],
            prices[1],
            prices[2],
            prices[3],
            prices[4],
            prices[5],
            prices[6],
            prices[7]
        );
    }

    /// @inheritdoc ICyberIdMiddleware
    function preRegister(
        DataTypes.RegisterCyberIdParams calldata params,
        bytes calldata data
    ) external payable override onlyNameRegistry returns (uint256) {
        DataTypes.EIP712Signature memory sig;
        bool free;
        (sig.v, sig.r, sig.s, sig.deadline, free) = abi.decode(
            data,
            (uint8, bytes32, bytes32, uint256, bool)
        );

        _requiresExpectedSigner(
            _hashTypedDataV4(
                keccak256(
                    abi.encode(
                        _REGISTER_TYPEHASH,
                        keccak256(bytes(params.cid)),
                        params.to,
                        nonces[params.to]++,
                        sig.deadline,
                        free
                    )
                )
            ),
            signer,
            sig.v,
            sig.r,
            sig.s,
            sig.deadline
        );
        if (free) {
            return 0;
        } else {
            uint256 cost = getPriceWei(params.cid);
            _chargeAndRefundOverPayment(cost, params.to, params.msgSender);
            return cost;
        }
    }

    /// @inheritdoc ICyberIdMiddleware
    function skipCommit() external pure virtual override returns (bool) {
        return true;
    }

    /*//////////////////////////////////////////////////////////////
                            PUBLIC VIEW
    //////////////////////////////////////////////////////////////*/

    function getPriceWei(string calldata cid) public view returns (uint256) {
        return _attoUSDToWei(_getUSDPrice(cid));
    }

    /*//////////////////////////////////////////////////////////////
                             INTERNAL LOGIC
    //////////////////////////////////////////////////////////////*/

    function _getUSDPrice(string calldata cid) internal view returns (uint256) {
        // LowerCaseCyberIdMiddleware ensures that each cid character only occupies 1 byte
        uint256 len = bytes(cid).length;
        uint256 usdPrice;

        if (len >= 12) {
            usdPrice = price12AndMoreLetter;
        } else if (len >= 7) {
            usdPrice = price7To11Letter;
        } else if (len == 6) {
            usdPrice = price6Letter;
        } else if (len == 5) {
            usdPrice = price5Letter;
        } else if (len == 4) {
            usdPrice = price4Letter;
        } else if (len == 3) {
            usdPrice = price3Letter;
        } else if (len == 2) {
            usdPrice = price2Letter;
        } else {
            usdPrice = price1Letter;
        }
        return usdPrice;
    }

    function _getPrice() internal view returns (int256) {
        // prettier-ignore
        (
            uint80 roundID,
            int price,
            /* uint startedAt */,
            uint updatedAt,
            /*uint80 answeredInRound*/
        ) = usdOracle.latestRoundData();
        require(roundID != 0, "INVALID_ORACLE_ROUND_ID");
        require(price > 0, "INVALID_ORACLE_PRICE");
        require(updatedAt > block.timestamp - 3 hours, "STALE_ORACLE_PRICE");
        return price;
    }

    function _attoUSDToWei(uint256 amount) internal view returns (uint256) {
        uint256 ethPrice = uint256(_getPrice());
        return (amount * 1e8) / ethPrice;
    }

    function _chargeAndRefundOverPayment(
        uint256 cost,
        address depositTo,
        address refundTo
    ) internal {
        require(msg.value >= cost, "INSUFFICIENT_FUNDS");
        /**
         * Already checked msg.value >= cost
         */
        uint256 overpayment;
        unchecked {
            overpayment = msg.value - cost;
        }

        if (overpayment > 0) {
            (bool refundSuccess, ) = refundTo.call{ value: overpayment }("");
            require(refundSuccess, "REFUND_FAILED");
        }
        if (rebateEnabled) {
            tokenReceiver.depositTo{ value: cost }(depositTo);
        } else {
            (bool chargeSuccess, ) = recipient.call{ value: cost }("");
            require(chargeSuccess, "CHARGE_FAILED");
        }
    }

    /*//////////////////////////////////////////////////////////////
                    EIP712 OVERRIDES
    //////////////////////////////////////////////////////////////*/
    function _domainSeparatorName()
        internal
        pure
        override
        returns (string memory)
    {
        return "PermissionedStableFeeMw";
    }
}

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

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

import { DataTypes } from "../libraries/DataTypes.sol";

interface ICyberIdMiddleware {
    /**
     * @notice Sets data for middleware.
     *
     * @param data Extra data to set.
     */
    function setMwData(bytes calldata data) external;

    /**
     * @notice Indicates if commit-reveal should be skipped.
     */
    function skipCommit() external pure returns (bool);

    /**
     * @notice Process that runs before the register happens.
     *
     * @param params The params for register cid.
     * @param data Extra data to process.
     */
    function preRegister(
        DataTypes.RegisterCyberIdParams calldata params,
        bytes calldata data
    ) external payable returns (uint256);

    /**
     * @notice Validates the name pattern.
     *
     * @param name The name to validate.
     */
    function namePatternValid(
        string calldata name
    ) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

/**
 * @title TokenReceiver
 * @author CyberConnect
 * @notice A contract that receive native token and record the amount.
 * The deposit only record the cumulative amount and withdraw won't affect
 * the deposit value.
 */
interface ITokenReceiver {
    function depositTo(address to) external payable;

    function withdraw(address to, uint256 amount) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

library DataTypes {
    struct EIP712Signature {
        uint8 v;
        bytes32 r;
        bytes32 s;
        uint256 deadline;
    }

    struct MetadataPair {
        string key;
        string value;
    }

    struct RegisterNameParams {
        address msgSender;
        string name;
        bytes32 parentNode;
        address to;
    }

    struct RegisterCyberIdParams {
        address msgSender;
        string cid;
        address to;
    }

    struct BatchRegisterCyberIdParams {
        string cid;
        address to;
        address resolver;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

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

abstract contract LowerCaseCyberIdMiddleware is ICyberIdMiddleware {
    /*//////////////////////////////////////////////////////////////
                            STORAGE
    //////////////////////////////////////////////////////////////*/

    address public immutable NAME_REGISTRY; // solhint-disable-line

    /*//////////////////////////////////////////////////////////////
                            CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(address nameRegistry) {
        NAME_REGISTRY = nameRegistry;
    }

    /*//////////////////////////////////////////////////////////////
                            MODIFIERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Reverts if called by any account other than the name registry.
     */
    modifier onlyNameRegistry() {
        require(NAME_REGISTRY == msg.sender, "NOT_NAME_REGISTRY");
        _;
    }

    /*//////////////////////////////////////////////////////////////
                    ICyberIdMiddleware OVERRIDES
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc ICyberIdMiddleware
    function skipCommit() external pure virtual override returns (bool) {
        return false;
    }

    /// @inheritdoc ICyberIdMiddleware
    function namePatternValid(
        string calldata name
    ) external pure virtual override returns (bool) {
        bytes memory byteName = bytes(name);

        if (byteName.length > 20 || byteName.length < 1) {
            return false;
        }

        uint256 byteNameLength = byteName.length;
        for (uint256 i = 0; i < byteNameLength; ) {
            bytes1 b = byteName[i];
            if ((b >= "0" && b <= "9") || (b >= "a" && b <= "z") || b == "_") {
                unchecked {
                    ++i;
                }
            } else {
                return false;
            }
        }
        return true;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.14;

import { DataTypes } from "../libraries/DataTypes.sol";

abstract contract EIP712 {
    /*//////////////////////////////////////////////////////////////
                                CONSTANTS
    //////////////////////////////////////////////////////////////*/
    bytes32 internal constant _HASHED_VERSION = keccak256("1");
    bytes32 private constant _TYPE_HASH =
        keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );

    /*//////////////////////////////////////////////////////////////
                            PUBLIC VIEW
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Returns the contract's {EIP712} domain separator.
     *
     * @return bytes32 the contract's {EIP712} domain separator.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() public view returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    _TYPE_HASH,
                    keccak256(bytes(_domainSeparatorName())),
                    _HASHED_VERSION,
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                              INTERNAL
    //////////////////////////////////////////////////////////////*/

    function _requiresExpectedSigner(
        bytes32 digest,
        address expectedSigner,
        uint8 v,
        bytes32 r,
        bytes32 s,
        uint256 deadline
    ) internal view {
        require(deadline >= block.timestamp, "DEADLINE_EXCEEDED");
        require(
            uint256(s) <=
                0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
            "INVALID_SIGNATURE_S_VAULE"
        );

        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0), "INVALID_RECOVERED_ADDRESS");
        require(recoveredAddress == expectedSigner, "INVALID_SIGNATURE");
    }

    function _requiresExpectedSigner(
        bytes32 digest,
        address expectedSigner,
        DataTypes.EIP712Signature calldata sig
    ) internal view {
        _requiresExpectedSigner(
            digest,
            expectedSigner,
            sig.v,
            sig.r,
            sig.s,
            sig.deadline
        );
    }

    function _hashTypedDataV4(
        bytes32 structHash
    ) internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR(), structHash)
            );
    }

    function _domainSeparatorName()
        internal
        view
        virtual
        returns (string memory);
}

{
  "remappings": [
    "@ens/=lib/ens-contracts/contracts/",
    "@ensdomains/=lib/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "buffer/=lib/buffer/contracts/",
    "chainlink/=lib/chainlink/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "ens-contracts/=lib/ens-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "solmate/=lib/solmate/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

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00000000000000000000000013e3ee699d1909e989722e753853ae30b17e08c5000000000000000000000000cd97405fb58e94954e825e46db192b916a45d412000000000000000000000000e55793f55df1f1b5037eba41881663583d4f9b24

-----Decoded View---------------
Arg [0] : _oracleAddress (address): 0x13e3Ee699D1909E989722E753853AE30b17e08c5
Arg [1] : _tokenReceiver (address): 0xcd97405Fb58e94954E825E46dB192b916A45d412
Arg [2] : cyberId (address): 0xe55793f55dF1F1B5037ebA41881663583d4f9B24

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000013e3ee699d1909e989722e753853ae30b17e08c5
Arg [1] : 000000000000000000000000cd97405fb58e94954e825e46db192b916a45d412
Arg [2] : 000000000000000000000000e55793f55df1f1b5037eba41881663583d4f9b24