인프런 커뮤니티 질문&답변

감사하게도 강좌를 통해 스마트 컨트랙트에 대해서 배우고 있는데요,

Bet 테스트 코드 실행 시, 에러가 발생하고 있는데 어디서 문제인지 파악이 안되서 질문글 올려요

Error: The send transactions "from" field must be defined!

Lottery.sol

pragma solidity >=0.4.22 <0.9.0;

contract Lottery {
    struct BetInfo {
        uint256 answerBlockNumber;
        address payable bettor;
        byte challenges; //0xab...
    }

    address public owner;

    uint256 private _tail;
    uint256 private _head;
    mapping (uint256 => BetInfo) private _bets;
    uint256 private _pot;
    
    uint256 constant internal BET_AMOUNT = 5 * 10 ** 15;
    uint256 constant internal BET_BLOCK_INTERVAL = 3;
    uint256 constant internal BLOCK_LIMIT = 256;

    event BET(uint256 index, address bettor, uint256 amount, byte challenges, uint256 answerBlockNumber);

    constructor() public {
        owner = msg.sender;
    }

    function getPot() public view returns (uint256 pot) {
        return _pot;
    }

    /**
    * @dev 베팅을 한다. 유저는 0.005 ETH를 보내야 하고, 베팅을 1 byte 글자를 보낸다.
    * 큐에 저장된 베팅 정보는 이후 distribute 함수에서 해결된다.
    * @param challenges 유저가 베팅하는 글자
    * @return 함수가 잘 수행되었는지 확인히는 bool 값
    */
    function bet(byte challenges) public payable returns (bool result) {        
        // check the paater ether is sent
        require(msg.value == BET_AMOUNT, "Not enoughf ETH");

        // push bet to the queue
        require(pushBet(challenges), "Fail to add a new Bet Info");

        // emit evnet
        emit BET(_tail - 1, msg.sender, msg.value, challenges, block.number + BET_BLOCK_INTERVAL);

        return true;
    }
        // save ther bet to the queue

    // 결과값 검증
        // check the answer

    function getBetInfo(uint256 index) public view returns (uint256 answerBlockNumber, address bettor, byte challenges) {
        BetInfo memory b = _bets[index];
        answerBlockNumber = b.answerBlockNumber;
        bettor = b.bettor;
        challenges = b.challenges;
    }

    // function pushBet(byte challenges) public returns (bool) {
    function pushBet(byte challenges) internal returns (bool) {
        BetInfo memory b;
        b.bettor = msg.sender;
        b.answerBlockNumber = block.number + BET_BLOCK_INTERVAL;
        b.challenges = challenges;

        _bets[_tail] = b;
        _tail++;

        return true;
    }

    // function popBet(uint256 index) public returns (bool) {
    function popBet(uint256 index) internal returns (bool) {
        delete _bets[index];
        return true;
    }
} 

lottery.test.js

const assertRevert = require("./assertRevert");
const Lottery = artifacts.require("Lottery");

contract('Lottery', function (deployer, user1, user2) {
    let lottery;
    beforeEach(async () => {
        lottery = await Lottery.new();
    })

    //it.only('getPot should return current pot', async () => {
    it('getPot should return current pot', async () => {
        let pot = await lottery.getPot();
        assert.equal(pot, 0);
    })

    describe('Bet', function () {
        console.log(user1);
        it.only('should fail when the bet money is not 0.005 ETH', async () => {
            // Fail transaction
            await assertRevert(lottery.bet('0xab', { from: user1, value: 4000000000000000 }))
            
            // transaction object {chainId, value, to, from, gas, gasPrice}
        })

        it('should put the bet to the bet queue with 1 bet', async () => {
            // bet
            await lottery.bet('0xab', { from: user1, value: 5000000000000000 })
            // check contract balance == 0.005

            // check bet info

            // check log
        })
    })
});

중간에 제가 노트북을 리부트해서 서버의 정보가 날라가서 일까요??

ganache-cli -d -m tutorial

로 다시 구동했는데, user1를 출력해보면 undefined가 나옵니다. ㅠㅠ