Contract Source Code (Solidity)

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•  contract Context
•    - function _msgSender()
•    - function _msgData()
•  contract Ownable is Context
•    - function owner()
•    - function isOwner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function _transferOwnership(address n ...
• interface IVerifiedUserRegistry
•    - function isVerifiedUser(address _user ...
•  contract BrightIdUserRegistry is O ... *
•    - function sponsor(address addr)
•    - function setSettings(bytes32 _context ...
•    - function isVerifiedUser(address _user ...
•    - function register(

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/**
 *Submitted for verification at gnosisscan.io on 2022-08-03
*/

// File @openzeppelin/contracts/GSN/[email protected]

pragma solidity ^0.5.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File @openzeppelin/contracts/ownership/[email protected]

pragma solidity ^0.5.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}


// File contracts/verifiedUserRegistry/IVerifiedUserRegistry.sol

pragma solidity ^0.5.17;

/**
 * @dev Interface of the registry of verified users.
 */
interface IVerifiedUserRegistry {

  function isVerifiedUser(address _user) external view returns (bool);

}


// File contracts/verifiedUserRegistry/BrightIdUserRegistry.sol

pragma solidity ^0.5.17;



contract BrightIdUserRegistry is Ownable, IVerifiedUserRegistry {
    string private constant ERROR_NEWER_VERIFICATION = 'NEWER VERIFICATION REGISTERED BEFORE';
    string private constant ERROR_NOT_AUTHORIZED = 'NOT AUTHORIZED';
    string private constant ERROR_INVALID_VERIFIER = 'INVALID VERIFIER';
    string private constant ERROR_INVALID_CONTEXT = 'INVALID CONTEXT';

    bytes32 public context;
    address public verifier;

    struct Verification {
        uint256 time;
        bool isVerified;
    }
    mapping(address => Verification) public verifications;

    event SetBrightIdSettings(bytes32 context, address verifier);
    event Sponsor(address indexed addr);

    /**
     * @param _context BrightID context used for verifying users
     * @param _verifier BrightID verifier address that signs BrightID verifications
     */
    constructor(bytes32 _context, address _verifier) public {
        // ecrecover returns zero on error
        require(_verifier != address(0), ERROR_INVALID_VERIFIER);

        context = _context;
        verifier = _verifier;
    }

    /**
     * @notice Sponsor a BrightID user by context id
     * @param addr BrightID context id
     */
    function sponsor(address addr) public {
        emit Sponsor(addr);
    }

    /**
     * @notice Set BrightID settings
     * @param _context BrightID context used for verifying users
     * @param _verifier BrightID verifier address that signs BrightID verifications
     */
    function setSettings(bytes32 _context, address _verifier) external onlyOwner {
        // ecrecover returns zero on error
        require(_verifier != address(0), ERROR_INVALID_VERIFIER);

        context = _context;
        verifier = _verifier;
        emit SetBrightIdSettings(_context, _verifier);
    }

    /**
     * @notice Check a user is verified or not
     * @param _user BrightID context id used for verifying users
     */
    function isVerifiedUser(address _user) external view returns (bool) {
        return verifications[_user].isVerified;
    }


    /**
     * @notice Register a user by BrightID verification
     * @param _context The context used in the users verification
     * @param _addrs The history of addresses used by this user in this context
     * @param _timestamp The BrightID node's verification timestamp
     * @param _v Component of signature
     * @param _r Component of signature
     * @param _s Component of signature
     */
    function register(
        bytes32 _context,
        address[] calldata _addrs,
        uint _timestamp,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external {
        require(context == _context, ERROR_INVALID_CONTEXT);
        require(verifications[_addrs[0]].time < _timestamp, ERROR_NEWER_VERIFICATION);

        bytes32 message = keccak256(abi.encodePacked(_context, _addrs, _timestamp));
        address signer = ecrecover(message, _v, _r, _s);
        require(verifier == signer, ERROR_NOT_AUTHORIZED);

        verifications[_addrs[0]].time = _timestamp;
        verifications[_addrs[0]].isVerified = true;
        for(uint i = 1; i < _addrs.length; i++) {
            // update time of all previous context ids to be sure no one can use old verifications again
            verifications[_addrs[i]].time = _timestamp;
            // set old verifications unverified
            verifications[_addrs[i]].isVerified = false;
        }
    }
}

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636c722e66756e64000000000000000000000000000000000000000000000000000000000000000000000000b1d71f62bee34e9fc349234c201090c33bcdf6db

-----Decoded View---------------
Arg [0] : _context (bytes32): 0x636c722e66756e64000000000000000000000000000000000000000000000000
Arg [1] : _verifier (address): 0xb1d71F62bEe34E9Fc349234C201090c33BCdF6DB

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 636c722e66756e64000000000000000000000000000000000000000000000000
Arg [1] : 000000000000000000000000b1d71f62bee34e9fc349234c201090c33bcdf6db