Contract Address Details

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * @notice Token on PulseChain distributing PLSX to holders proportional
 *         to their CODA balance, with a Smaug holding multiplier.
 *         No privileged wallets. No silent drains. No broken promises.
 *
 * @dev    Key tokenomics:
 *           - Single reward stream: PLSX.
 *           - 5% buy/sell tax, 0% transfer tax, hard cap of 10%.
 *           - Silent read of running Smaug holdings. No staking or approval required.
 *
 *         "O good Apollo, for this last task, I pray
 *          you make me such a vessel with your powers
 *          as you deem worthy to be crowned with bay."
 *
 *          — Dante Alighieri, Paradiso, I.13–15
 */

abstract contract Context {
    function _msgSender() internal view virtual returns (address) { return msg.sender; }
}

abstract contract Ownable is Context {
    address private _owner;
    error OwnableUnauthorizedAccount(address account);
    error OwnableInvalidOwner(address owner);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor(address initialOwner) {
        if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); }
        _transferOwnership(initialOwner);
    }
    modifier onlyOwner() { _checkOwner(); _; }
    function owner() public view virtual returns (address) { return _owner; }
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); }
    }
    function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); }
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); }
        _transferOwnership(newOwner);
    }
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function decimals() external view returns (uint8);
    function symbol() external view returns (string memory);
    function name() external view returns (string memory);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address _owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IDEXFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IDEXRouter {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin, address[] calldata path, address to, uint deadline
    ) external payable;
}

interface IDividendDistributor {
    function setShare(address shareholder, uint256 amount) external;
    function depositPlsx() external payable;
    function process(uint256 gas) external;
    function claimDividend(address claimer) external;
    function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external;
    function getShareholderCount() external view returns (uint256);
}

// ---------------------------------------------------------------------------
// DividendDistributor -- PLSX rewards
// ---------------------------------------------------------------------------
contract DividendDistributor is IDividendDistributor {
    address _token;

    IERC20 public smaugToken = IERC20(0xf4754Aa585caBf38537A68660469A17E203D8632);
    IERC20 public codaToken;
    IERC20 public constant PLSX = IERC20(0x95B303987A60C71504D99Aa1b13B4DA07b0790ab);
    IERC20 public constant WPLS = IERC20(0xA1077a294dDE1B09bB078844df40758a5D0f9a27);
    address public constant DEAD = 0x0000000000000000000000000000000000000369;

    IDEXRouter public router;

    // -----------------------------------------------------------------------
    // Smaug multiplier
    // Log-aware curve optimised for 1k-10k holder range.
    // -----------------------------------------------------------------------
    function getSmaugMultiplier(address shareholder) public view returns (uint256) {
        uint256 bal         = smaugToken.balanceOf(shareholder);
        uint256 supply      = smaugToken.totalSupply();
        uint256 dead        = smaugToken.balanceOf(DEAD);
        uint256 circulating = supply > dead ? supply - dead : 1;
        uint256 pct         = bal * 1_000_000 / circulating;

        if (pct >= 10_000) return 120;  // >= 1.00%   -> 1.20x
        if (pct >=  5_000) return 119;  // >= 0.50%   -> 1.19x
        if (pct >=  2_500) return 117;  // >= 0.25%   -> 1.17x
        if (pct >=  1_000) return 115;  // >= 0.10%   -> 1.15x
        if (pct >=    500) return 112;  // >= 0.05%   -> 1.12x
        if (pct >=    150) return 110;  // >= 0.015%  -> 1.10x
        if (pct >=     50) return 108;  // >= 0.005%  -> 1.08x
        if (pct >=     10) return 106;  // >= 0.001%  -> 1.06x
        if (pct >=      5) return 104;  // >= 0.0005% -> 1.04x
        if (pct >=      1) return 102;  // >= 0.0001% -> 1.02x
        return 100;
    }

    function getShareholderCount() external view returns (uint256) {
        return shareholders.length;
    }

    // -----------------------------------------------------------------------
    // Shareholder state
    // -----------------------------------------------------------------------
    struct Share {
        uint256 amount;        // effective weighted shares (raw * smaugMultiplier / 100)
        uint256 totalExcluded; // cumulative dividends at last sync
        uint256 totalRealised; // cumulative PLSX received
    }

    address[] shareholders;
    mapping(address => uint256) shareholderIndexes;
    mapping(address => uint256) shareholderClaims;
    mapping(address => Share)   public shares;

    uint256 public totalShares;
    uint256 public totalDividends;
    uint256 public totalDistributed;
    uint256 public dividendsPerShare;
    uint256 public constant dividendsPerShareAccuracyFactor = 10 ** 36;

    uint256 public minPeriod       = 1 hours;
    uint256 public minDistribution = 1000e18; // 1000 PLSX

    uint256 currentIndex;

    modifier onlyToken() {
        require(msg.sender == _token);
        _;
    }

    constructor() {
        _token    = msg.sender;
        codaToken = IERC20(msg.sender);
        router    = IDEXRouter(0x165C3410fC91EF562C50559f7d2289fEbed552d9); // PulseX V2
    }

    // -----------------------------------------------------------------------
    // Configuration
    // -----------------------------------------------------------------------

    function setDistributionCriteria(
        uint256 _minPeriod,
        uint256 _minDistribution
    ) external override onlyToken {
        minPeriod       = _minPeriod;
        minDistribution = _minDistribution;
    }

    // -----------------------------------------------------------------------
    // Share management -- Smaug multiplier baked in at setShare() time
    // -----------------------------------------------------------------------

    function setShare(address shareholder, uint256 amount) external override onlyToken {
        if (shares[shareholder].amount > 0) {
            distributeDividend(shareholder);
        }

        if (amount > 0 && shares[shareholder].amount == 0) {
            addShareholder(shareholder);
        } else if (amount == 0 && shares[shareholder].amount > 0) {
            removeShareholder(shareholder);
        }

        uint256 effectiveAmount = amount > 0
            ? amount * getSmaugMultiplier(shareholder) / 100
            : 0;

        totalShares = totalShares - shares[shareholder].amount + effectiveAmount;
        shares[shareholder].amount        = effectiveAmount;
        shares[shareholder].totalExcluded = getCumulativeDividends(effectiveAmount);
    }

    // -----------------------------------------------------------------------
    // Deposit -- swap incoming PLS to PLSX, update accumulator
    // -----------------------------------------------------------------------

    function depositPlsx() external payable override onlyToken {
        require(totalShares > 0, "No shareholders yet");

        uint256 balBefore = PLSX.balanceOf(address(this));

        address[] memory path = new address[](2);
        path[0] = address(WPLS);
        path[1] = address(PLSX);

        router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: msg.value}(
            0, path, address(this), block.timestamp
        );

        uint256 gained = PLSX.balanceOf(address(this)) - balBefore;
        if (gained == 0) return;

        totalDividends    = totalDividends + gained;
        dividendsPerShare = dividendsPerShare +
            dividendsPerShareAccuracyFactor * gained / totalShares;
    }

    // -----------------------------------------------------------------------
    // Distribution
    // -----------------------------------------------------------------------

    function distributeDividend(address shareholder) internal {
        if (shares[shareholder].amount == 0) return;

        uint256 amount = getUnpaidEarnings(shareholder);
        if (amount == 0) return;

        uint256 available = PLSX.balanceOf(address(this));
        if (amount > available) amount = available;
        if (amount == 0) return;

        totalDistributed                    = totalDistributed + amount;
        shareholderClaims[shareholder]      = block.timestamp;
        shares[shareholder].totalRealised   = shares[shareholder].totalRealised + amount;
        shares[shareholder].totalExcluded   = getCumulativeDividends(shares[shareholder].amount);
        PLSX.transfer(shareholder, amount);
    }

    // -----------------------------------------------------------------------
    // Batch processor -- passively refreshes Smaug multiplier each iteration
    // -----------------------------------------------------------------------

    function process(uint256 gas) external override onlyToken {
        uint256 shareholderCount = shareholders.length;
        if (shareholderCount == 0) return;

        uint256 gasUsed    = 0;
        uint256 gasLeft    = gasleft();
        uint256 iterations = 0;

        while (gasUsed < gas && iterations < shareholderCount) {
            if (currentIndex >= shareholderCount) currentIndex = 0;

            address shareholder = shareholders[currentIndex];

            uint256 currentBalance  = codaToken.balanceOf(shareholder);
            uint256 effectiveAmount = currentBalance > 0
                ? currentBalance * getSmaugMultiplier(shareholder) / 100
                : 0;

            if (effectiveAmount != shares[shareholder].amount) {
                totalShares = totalShares - shares[shareholder].amount + effectiveAmount;
                shares[shareholder].amount        = effectiveAmount;
                shares[shareholder].totalExcluded = getCumulativeDividends(effectiveAmount);
            }

            if (shouldDistribute(shareholder)) {
                distributeDividend(shareholder);
            }

            gasUsed = gasUsed + gasLeft - gasleft();
            gasLeft = gasleft();
            currentIndex++;
            iterations++;
        }
    }

    function shouldDistribute(address shareholder) internal view returns (bool) {
        return shareholderClaims[shareholder] + minPeriod < block.timestamp
            && getUnpaidEarnings(shareholder) > minDistribution;
    }

    function claimDividend(address claimer) external override onlyToken {
    distributeDividend(claimer);
    }

    // -----------------------------------------------------------------------
    // View functions
    // -----------------------------------------------------------------------

    function getUnpaidEarnings(address shareholder) public view returns (uint256) {
        if (shares[shareholder].amount == 0) return 0;
        uint256 shareholderTotal    = getCumulativeDividends(shares[shareholder].amount);
        uint256 shareholderExcluded = shares[shareholder].totalExcluded;
        if (shareholderTotal <= shareholderExcluded) return 0;
        return shareholderTotal - shareholderExcluded;
    }

    function getTotalEarned(address shareholder) public view returns (uint256) {
        return shares[shareholder].totalRealised + getUnpaidEarnings(shareholder);
    }

    function getCumulativeDividends(uint256 share) internal view returns (uint256) {
        return share * dividendsPerShare / dividendsPerShareAccuracyFactor;
    }

    // -----------------------------------------------------------------------
    // Shareholder list management
    // -----------------------------------------------------------------------

    function addShareholder(address shareholder) internal {
        shareholderIndexes[shareholder] = shareholders.length;
        shareholders.push(shareholder);
    }

    function removeShareholder(address shareholder) internal {
        uint256 index      = shareholderIndexes[shareholder];
        address lastHolder = shareholders[shareholders.length - 1];
        shareholders[index]            = lastHolder;
        shareholderIndexes[lastHolder] = index;
        shareholders.pop();
        delete shareholderIndexes[shareholder];
    }

    receive() external payable {}
}

// ---------------------------------------------------------------------------
// CODA
// ---------------------------------------------------------------------------
contract CODA is IERC20, Ownable {
    address WPLS = 0xA1077a294dDE1B09bB078844df40758a5D0f9a27;
    address DEAD = 0x0000000000000000000000000000000000000369;

    string constant _name    = "CODA";
    string constant _symbol  = "CODA";
    uint8  constant _decimals = 18;

    uint256 _totalSupply = 50_000_000_000e18;

    mapping(address => uint256) _balances;
    mapping(address => mapping(address => uint256)) _allowances;
    mapping(address => bool) public isFeeExempt;
    mapping(address => bool) public isDividendExempt;

    // -----------------------------------------------------------------------
    // Fee structure
    //   PLSX reflection: 500 bps = 5%
    //   Total:           500 bps = 5% buy/sell
    //   Hard cap:       1000 bps = 10% maximum
    // -----------------------------------------------------------------------
    uint256 public plsxReflectionFee  = 500;  // 5%
    uint256 public totalBuyFee        = 500;
    uint256 public totalSellFee       = 500;
    uint256 public feeDenominator     = 10000;
    bool    public feesOnNormalTransfers = false;

    IDEXRouter public router;
    address public pair;
    address[] public pairs;

    DividendDistributor public distributor;
    uint256 distributorGas = 500000;

    bool    public swapEnabled   = true;
    uint256 public swapThreshold = 4000e18; // 4,000 CODA
    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }

    constructor() Ownable(msg.sender) {
        router = IDEXRouter(0x165C3410fC91EF562C50559f7d2289fEbed552d9); // PulseX V2
        pair   = IDEXFactory(router.factory()).createPair(WPLS, address(this));
        _allowances[address(this)][address(router)] = type(uint256).max;
        pairs.push(pair);
        distributor = new DividendDistributor();

        address owner_ = msg.sender;
        isFeeExempt[owner_]             = true;
        isDividendExempt[owner_]        = true;
        isDividendExempt[pair]          = true;
        isDividendExempt[address(this)] = true;
        isFeeExempt[address(this)]      = true;
        isDividendExempt[DEAD]          = true;

        _balances[owner_] = _totalSupply;
        emit Transfer(address(0), owner_, _totalSupply);
    }

    receive() external payable {}

    // -----------------------------------------------------------------------
    // ERC-20
    // -----------------------------------------------------------------------

    function totalSupply()                              external view override returns (uint256)       { return _totalSupply; }
    function decimals()                                 external pure override returns (uint8)         { return _decimals; }
    function symbol()                                   external pure override returns (string memory) { return _symbol; }
    function name()                                     external pure override returns (string memory) { return _name; }
    function balanceOf(address account)                 public view override returns (uint256)         { return _balances[account]; }
    function allowance(address holder, address spender) external view override returns (uint256)       { return _allowances[holder][spender]; }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        if (_allowances[sender][msg.sender] != ~uint256(0)) {
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender] - amount;
        }
        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if (inSwap) { return _basicTransfer(sender, recipient, amount); }
        if (shouldSwapBack()) { swapBack(); }

        _balances[sender] = _balances[sender] - amount;
        uint256 amountReceived = shouldTakeFee(sender, recipient)
            ? takeFee(sender, recipient, amount)
            : amount;
        _balances[recipient] = _balances[recipient] + amountReceived;

        if (!isDividendExempt[sender]) {
            try distributor.setShare(sender, _balances[sender]) {} catch {}
        }
        if (!isDividendExempt[recipient]) {
            try distributor.setShare(recipient, _balances[recipient]) {} catch {}
        }

        try distributor.process(distributorGas) {} catch {}

        emit Transfer(sender, recipient, amountReceived);
        return true;
    }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender]    = _balances[sender] - amount;
        _balances[recipient] = _balances[recipient] + amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function shouldTakeFee(address sender, address recipient) internal view returns (bool) {
        if (isFeeExempt[sender] || isFeeExempt[recipient]) return false;
        address[] memory liqPairs = pairs;
        for (uint256 i = 0; i < liqPairs.length; i++) {
            if (sender == liqPairs[i] || recipient == liqPairs[i]) return true;
        }
        return feesOnNormalTransfers;
    }

    function getTotalFee(bool selling) public view returns (uint256) {
        return selling ? totalSellFee : totalBuyFee;
    }

    function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
        uint256 feeAmount = amount * getTotalFee(isSell(recipient)) / feeDenominator;
        _balances[address(this)] = _balances[address(this)] + feeAmount;
        emit Transfer(sender, address(this), feeAmount);
        return amount - feeAmount;
    }

    function isSell(address recipient) internal view returns (bool) {
        address[] memory liqPairs = pairs;
        for (uint256 i = 0; i < liqPairs.length; i++) {
            if (recipient == liqPairs[i]) return true;
        }
        return false;
    }

    function shouldSwapBack() internal view returns (bool) {
        return msg.sender != pair && !inSwap && swapEnabled && _balances[address(this)] >= swapThreshold;
    }

    // -----------------------------------------------------------------------
    // SwapBack -- sells accumulated CODA fees -> PLS -> swaps to PLSX -> holders
    // -----------------------------------------------------------------------

    function swapBack() internal swapping {
        uint256 amountToSwap = swapThreshold;
        uint256 balanceBefore = address(this).balance;

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = WPLS;

        try router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap, 0, path, address(this), block.timestamp
        ) {
            uint256 amountPls = address(this).balance - balanceBefore;

            // Send PLS to distributor which swaps it to PLSX and distributes
            if (amountPls > 0) {
                try distributor.depositPlsx{value: amountPls}() {} catch {}
            }

            emit SwapBackSuccess(amountToSwap);
        } catch Error(string memory e) {
            emit SwapBackFailed(string(abi.encodePacked("SwapBack failed: ", e)));
        } catch {
            emit SwapBackFailed("SwapBack failed without an error message from PulseX");
        }
    }

    // -----------------------------------------------------------------------
    // Owner functions
    // -----------------------------------------------------------------------

    function setIsDividendExempt(address holder, bool exempt) external onlyOwner {
        require(holder != address(this) && holder != pair);
        isDividendExempt[holder] = exempt;
        if (exempt) {
            distributor.setShare(holder, 0);
        } else {
            distributor.setShare(holder, _balances[holder]);
        }
    }

    function setIsFeeExempt(address holder, bool exempt) external onlyOwner {
        isFeeExempt[holder] = exempt;
    }

    function setFees(
        uint256 _plsxReflectionFee,
        uint256 _totalBuyFee,
        uint256 _totalSellFee,
        bool    _feesOnNormalTransfers
    ) external onlyOwner {
        require(_plsxReflectionFee <= 1000, "PLSX reflection max 10%");
        require(_totalBuyFee       <= 1000, "Buy fee max 10%");
        require(_totalSellFee      <= 1000, "Sell fee max 10%");
        plsxReflectionFee     = _plsxReflectionFee;
        totalBuyFee           = _totalBuyFee;
        totalSellFee          = _totalSellFee;
        feesOnNormalTransfers = _feesOnNormalTransfers;
        emit ParameterUpdated();
    }

    function setSwapBackSettings(bool _enabled, uint256 _amount) external onlyOwner {
        swapEnabled   = _enabled;
        swapThreshold = _amount;
        emit ParameterUpdated();
    }

    function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external onlyOwner {
        distributor.setDistributionCriteria(_minPeriod, _minDistribution);
        emit ParameterUpdated();
    }

    function setDistributorGas(uint256 gas) external onlyOwner {
        require(gas <= 2500000, "Max gas is 2500000");
        distributorGas = gas;
        emit ParameterUpdated();
    }

    function addPair(address newPair) external onlyOwner {
        pairs.push(newPair);
        isDividendExempt[newPair] = true;
        distributor.setShare(newPair, 0);
        emit ParameterUpdated();
    }

    function removeLastPair() external onlyOwner {
        require(pairs.length > 1, "Cannot remove the only pair");
        require(pairs[pairs.length - 1] != pair, "Cannot remove primary pair");
        pairs.pop();
        emit ParameterUpdated();
    }

    function rescueERC20(address tokenAddress, uint256 amount) external onlyOwner {
        require(tokenAddress != address(this), "Cannot rescue CODA");
        IERC20(tokenAddress).transfer(owner(), amount);
    }

    function rescuePLS(uint256 amount) external onlyOwner {
        (bool success, ) = payable(owner()).call{value: amount}("");
        require(success, "PLS transfer failed");
    }

    // -----------------------------------------------------------------------
    // View functions
    // -----------------------------------------------------------------------

    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply - balanceOf(DEAD);
    }

    function claimDividend() external {
    distributor.claimDividend(msg.sender);
    }

    function getTotalPlsxEarned(address holder) public view returns (uint256) {
        return distributor.getTotalEarned(holder);
    }

    function getUnpaidEarnings(address holder) public view returns (uint256) {
        return distributor.getUnpaidEarnings(holder);
    }

    function getSmaugMultiplier(address holder) public view returns (uint256) {
        return distributor.getSmaugMultiplier(holder);
    }

    function getTotalPlsxDistributed() public view returns (uint256) {
        return distributor.totalDistributed();
    }

    function getTotalPlsxDeposited() public view returns (uint256) {
        return distributor.totalDividends();
    }

    function getShareholderCount() public view returns (uint256) {
        return distributor.getShareholderCount();
    }

    // -----------------------------------------------------------------------
    // Events
    // -----------------------------------------------------------------------

    event ParameterUpdated();
    event SwapBackSuccess(uint256 amount);
    event SwapBackFailed(string message);
}