Simple.sol

// SPDX-License-Identifier: MIT

/*






Dynamic Fees:

Any time someone trades, their price impact is calculated and added onto the sell fee before their sell. The buy fee goes down by the same amount. Fees revert back to 10% at a rate of 1% per minute.

There is a maximum trade fee of 30%, and minimum buy fee of -10% (ie, a 10% bonus on trades in).

Hourly Biggest Buyer:

Every hour, 5% of the tokens from liquidity will be rewarded to the biggest trader of the previous hour. Fully automated on-chain.

Vested Dividends:

 fees are converted to ETH and paid as ETH dividends to holders. Dividends vest continuously over 3 days. If you sell early, you will miss out on some rewards. Hold and behold.



HUGE THANKS TO ASHONCHAIN

*/

pragma solidity ^0.8.4;

import "./DividendTracker.sol";
import "./SafeMath.sol";
import "./IterableMapping.sol";
import "./Ownable.sol";
import "./IUniswapV2Pair.sol";
import "./IUniswapV2Factory.sol";
import "./IUniswapV2Router.sol";
import "./UniswapV2PriceImpactCalculator.sol";
import "./LiquidityBurnCalculator.sol";
import "./MaxWalletCalculator.sol";
import "./Storage.sol";

contract SIMPLE is ERC20, Ownable {
    using SafeMath for uint256;
    using Storage for Storage.Data;
    using Fees for Fees.Data;
    using BiggestTrader for Biggestrader.Data;
    using Referrals for Referrals.Data;
    using Transfers for Transfers.Data;

    Storage.Data private _storage;

    uint256 public constant MAX_SUPPLY = 1000000 * (10**18);

    uint256 private hatchTime;

    bool private swapping;
    uint256 public liquidityTokensAvailableToBurn;
    uint256 public liquidityBurnTime;

  DividendTracker public dividendTracker;

    uint256 private swapTokensAtAmount = 200 * (10**18);
    uint256 private swapTokensMaxAmount = 1000 * (10**18);

    // exlcude from fees and max transaction amount
    mapping (address => bool) public isExcludedFromFees;

    event UpdateDividendTracker(address indexed newAddress);

    event ExcludeFromFees(address indexed account, bool isExcluded);
    event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);

    event LiqudityBurn(uint256 value);

    event LiquidityBurn(
        uint256 amount
    );

    event ClaimTokens(
        address indexed account,
        uint256 amount
    );

    event UpdateMysteryContract(address mysteryContract);

    constructor() ERC20("Simple", "$SIMP) {
        _storage.router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _storage.pair = IUniswapV2Pair(
          IUniswapV2Factory(_storage.router.factory()
        ).createPair(address(this), _storage.router.WETH()));


        _mint(owner(), MAX_SUPPLY);

        _approve(address(this), address(_storage.router), type(uint).max);
        IUniswapV2Pair(_storage.pair).approve(address(_storage.router), type(uint).max);

        _storage.fees.init(_storage, address(_storage.pair));
        _storage.biggestBuyer.init();
        _storage.referrals.init();
        _storage.transfers.init(address(_storage.router), address(_storage.pair));

        _storage.dividendTracker = new ChameleonDividendTracker(payable(address(this)), address(_storage.pair), _storage.router.WETH());

        setupDividendTracker();

        _storage.marketingWallet1 = 0xeD9017c2c910967a4dab176160E68544f451716C;
        _storage.marketingWallet2 = 0x768b5315282bC0A84a9fE4762621336246C3c364;

        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(_storage.router), true);
        excludeFromFees(address(_storage.dividendTracker), true);
        excludeFromFees(_storage.marketingWallet1, true);
        excludeFromFees(_storage.marketingWallet2, true);
    }

    receive() external payable {

  	}

    function approve(address spender, uint256 amount) public override returns (bool) {
        //Piggyback off approvals to burn tokens
        burnLiquidityTokens();
        return super.approve(spender, amount);
    }

    function approveWithoutBurn(address spender, uint256 amount) public returns (bool) {
        return super.approve(spender, amount);
    }

    function updateMysteryContract(address mysteryContract) public onlyOwner {
        _storage.mysteryContract = IMysteryContract(mysteryContract);
        emit UpdateMysteryContract(mysteryContract);
        isExcludedFromFees[mysteryContract] = true;

        //ensure the functions exist
        _storage.mysteryContract.handleBuy(address(0), 0, 0);
        _storage.mysteryContract.handleSell(address(0), 0, 0);
    }

    function updateBaseFee(uint256 baseFee) public onlyOwner {
        _storage.fees.updateBaseFee(baseFee);
    }

    function updateFeeImpacts(uint256 sellImpact, uint256 timeImpact) public onlyOwner {
        _storage.fees.updateFeeSellImpact(sellImpact);
        _storage.fees.updateFeeTimeImpact(timeImpact);
    }

    function updateFeeDestinationPercents(uint256 dividendsPercent, uint256 marketingPercent, uint256 mysteryPercent) public onlyOwner {
        _storage.fees.updateFeeDestinationPercents(_storage, dividendsPercent, marketingPercent, mysteryPercent);
    }

    function updateBiggestBuyerRewardFactor(uint256 value) public onlyOwner {
        _storage.biggestBuyer.updateRewardFactor(value);
    }

    function updateReferrals(uint256 referralBonus, uint256 referredBonus, uint256 tokensNeeded) public onlyOwner {
        _storage.referrals.updateReferralBonus(referralBonus);
        _storage.referrals.updateReferredBonus(referredBonus);
        _storage.referrals.updateTokensNeededForReferralNumber(tokensNeeded);
    }

    function updateDividendTracker(address newAddress) public onlyOwner {
        _storage.dividendTracker = ChameleonDividendTracker(payable(newAddress));

        require(_storage.dividendTracker.owner() == address(this));

        setupDividendTracker();

        emit UpdateDividendTracker(newAddress);
    }

    function setupDividendTracker() private {
        _storage.dividendTracker.excludeFromDividends(address(_storage.dividendTracker));
        _storage.dividendTracker.excludeFromDividends(address(this));
        _storage.dividendTracker.excludeFromDividends(owner());
        _storage.dividendTracker.excludeFromDividends(address(_storage.router));
        _storage.dividendTracker.excludeFromDividends(address(_storage.pair));
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function excludeFromDividends(address account) public onlyOwner {
        _storage.dividendTracker.excludeFromDividends(account);
    }

    function updateVestingDuration(uint256 vestingDuration) external onlyOwner {
        _storage.dividendTracker.updateVestingDuration(vestingDuration);
    }

    function updateUnvestedDividendsMarketingFee(uint256 unvestedDividendsMarketingFee) external onlyOwner {
        _storage.dividendTracker.updateUnvestedDividendsMarketingFee(unvestedDividendsMarketingFee);
    }

    function setSwapTokensAtAmount(uint256 amount) external onlyOwner {
        require(amount < 1000 * (10**18));
        swapTokensAtAmount = amount;
    }

    function setSwapTokensMaxAmount(uint256 amount) external onlyOwner {
        require(amount < 10000 * (10**18));
        swapTokensMaxAmount = amount;
    }

    function manualSwapAccumulatedFees() external onlyOwner {
        _storage.fees.swapAccumulatedFees(_storage, balanceOf(address(this)));
    }

    function getData(address account) external view returns (uint256[] memory dividendInfo, uint256 referralCode, int256 buyFee, uint256 sellFee, address biggestBuyerCurrentHour, uint256 biggestBuyerAmountCurrentHour, uint256 biggestBuyerRewardCurrentHour, address biggestBuyerPreviousHour, uint256 biggestBuyerAmountPreviousHour, uint256 biggestBuyerRewardPreviousHour, uint256 blockTimestamp) {
        dividendInfo = _storage.dividendTracker.getDividendInfo(account);

        referralCode = _storage.referrals.getReferralCode(account);

        (buyFee,
        sellFee) = _storage.fees.getCurrentFees();

        uint256 hour = _storage.biggestBuyer.getHour();

        (biggestBuyerCurrentHour, biggestBuyerAmountCurrentHour,) = _storage.biggestBuyer.getBiggestBuyer(hour);

        biggestBuyerRewardCurrentHour = _storage.biggestBuyer.calculateBiggestBuyerReward(getLiquidityTokenBalance());

        if(hour > 0) {
            (biggestBuyerPreviousHour, biggestBuyerAmountPreviousHour, biggestBuyerRewardPreviousHour) = _storage.biggestBuyer.getBiggestBuyer(hour - 1);

            if(biggestBuyerPreviousHour != address(0) &&
               biggestBuyerRewardPreviousHour == 0) {
                biggestBuyerRewardPreviousHour = biggestBuyerRewardCurrentHour;
            }
        }

        blockTimestamp = block.timestamp;
    }

    function getLiquidityTokenBalance() private view returns (uint256) {
        return balanceOf(address(_storage.pair));
    }

    function claimDividends() external {
		_storage.dividendTracker.claimDividends(
            msg.sender,
            _storage.marketingWallet1,
            _storage.marketingWallet2,
            false);
    }

    function burnLiquidityTokens() public {
        uint256 burnAmount = LiquidityBurnCalculator.calculateBurn(
            getLiquidityTokenBalance(),
            liquidityTokensAvailableToBurn,
            liquidityBurnTime);

        if(burnAmount == 0) {
            return;
        }

        liquidityBurnTime = block.timestamp;
        liquidityTokensAvailableToBurn -= burnAmount;

        _burn(address(_storage.pair), burnAmount);
        _storage.pair.sync();

        emit LiquidityBurn(burnAmount);
    }

    function hatch() external onlyOwner {
        require(hatchTime == 0);

        _storage.router.addLiquidityETH {
            value: address(this).balance
        } (
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );

        hatchTime = block.timestamp;
    }

    function takeFees(address from, uint256 amount, uint256 feeFactor) private returns (uint256) {
        uint256 fees = Fees.calculateFees(amount, feeFactor);
        amount = amount.sub(fees);
        super._transfer(from, address(this), fees);
        return amount;
    }

    function mintFromLiquidity(address account, uint256 amount) private {
        if(amount == 0) {
            return;
        }
        liquidityTokensAvailableToBurn += amount;
        _mint(account, amount);
    }

    function handleNewBalanceForReferrals(address account) private {
        if(isExcludedFromFees[account]) {
            return;
        }

        if(account == address(_storage.pair)) {
            return;
        }

        _storage.referrals.handleNewBalance(account, balanceOf(account));
    }

    function payBiggestBuyer(uint256 hour) public {
        uint256 liquidityTokenBalance = getLiquidityTokenBalance();

        (address winner, uint256 amountWon) = _storage.biggestBuyer.payBiggestBuyer(hour, liquidityTokenBalance);

        if(winner != address(0))  {
            mintFromLiquidity(winner, amountWon);
            handleNewBalanceForReferrals(winner);
            _storage.dividendTracker.setBalance(winner, balanceOf(winner));
        }
    }

    function maxWallet() public view returns (uint256) {
        return MaxWalletCalculator.calculateMaxWallet(MAX_SUPPLY, hatchTime);
    }

    function executePossibleSwap(address from, address to, uint256 amount) private {
        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if(from != owner() && to != owner()) {
            if(
                to != address(this) &&
                to != address(_storage.pair) &&
                to != address(_storage.router)
            ) {
                require(balanceOf(to) + amount <= maxWallet());
            }

            if(
                canSwap &&
                !swapping &&
                from != address(_storage.pair) &&
                hatchTime > 0 &&
                block.timestamp > hatchTime
            ) {
                swapping = true;

                uint256 swapAmount = contractTokenBalance;

                if(swapAmount > swapTokensMaxAmount) {
                    swapAmount = swapTokensMaxAmount;
                }

                _approve(address(this), address(_storage.router), swapAmount);

                _storage.fees.swapAccumulatedFees(_storage, swapAmount);

                swapping = false;
            }
        }
    }

    function _transfer(address from, address to, uint256 amount) internal override {
        require(from != address(0));
        require(to != address(0));

        if(amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        executePossibleSwap(from, to, amount);

        bool takeFee = !swapping &&
                        !isExcludedFromFees[from] &&
                        !isExcludedFromFees[to];

        uint256 originalAmount = amount;
        int256 transferFees = 0;

        if(takeFee) {
            address referrer = _storage.referrals.getReferrerFromTokenAmount(amount);

            if(!_storage.referrals.isValidReferrer(referrer, balanceOf(referrer), to)) {
                referrer = address(0);
            }

            (uint256 fees,
            uint256 buyerMint,
            uint256 referrerMint) =
            _storage.transfers.handleTransferWithFees(_storage, from, to, amount, referrer);

            transferFees = int256(fees) - int256(buyerMint);

            if(fees > 0) {
                amount -= fees;
                super._transfer(from, address(this), fees);
            }

            if(buyerMint > 0) {
                mintFromLiquidity(to, buyerMint);
            }

            if(referrerMint > 0) {
                mintFromLiquidity(referrer, referrerMint);
                _storage.dividendTracker.setBalance(referrer, balanceOf(referrer));
            }
        }

        super._transfer(from, to, amount);

        handleNewBalanceForReferrals(to);

        uint256 hour = _storage.biggestBuyer.getHour();

        if(hour > 0) {
            payBiggestBuyer(hour - 1);
        }

        _storage.dividendTracker.setBalance(from, balanceOf(from));
        _storage.dividendTracker.setBalance(to, balanceOf(to));

        _storage.handleTransfer(from, to, originalAmount, transferFees);
    }
}