Contract Address Details

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

import {PulseBurnLaunch} from "./PulseBurnLaunch.sol";

/// @title LaunchWindowManager
/// @notice Owns the token through its ten-minute launch window with exactly the powers that
///         window needs, then offers ownership on to the timelock. Decision D3, 2026-09-24.
///
/// @dev WHY THIS EXISTS. `flagSnipers`, `clearSniper` and `liftLimitsEarly` matter only inside
///      the window, and only its owner can call them. The owner the launch hands to must
///      `acceptOwnership()` first (Ownable2Step), and a timelock with a 72-hour delay cannot
///      accept anything inside ten minutes - so with the timelock as the direct final owner,
///      the window's tools were unreachable exactly when they mattered.
///
///      Handing the token to an operator's EOA instead would reach them, and would also put
///      `setFeeRecipient`, `setFeeBps`, `setExempt` and `setPair` in that one key's hands
///      until the timelock took over three days later. So this contract sits in between with
///      a FIXED surface: the three window functions, for the operator only, and nothing else.
///      It cannot redirect fees, change them, exempt anyone, register a pair or renounce.
///
///      THE OPERATOR'S POWERS END ON THE CLOCK, not on anyone's action. All three tools work only
///      while the window is open: `flagSnipers` and `liftLimitsEarly` because the token itself
///      refuses them afterwards, `clearSniper` because this contract does. Nothing needs to be
///      cleared afterwards anyway - the token reads a sniper flag only inside the window, so a
///      flagged wallet can sell the moment the window ends, whether or not anyone acts.
///
///      After the window, anyone may offer ownership to the timelock - the operator is not a
///      dependency - and the timelock accepts through a scheduled operation. Until it does, this
///      contract owns the token and can do nothing with it at all.
contract LaunchWindowManager {
    PulseBurnLaunch public immutable token;
    address public immutable operator;
    address public immutable timelock;

    event Claimed(address indexed token);
    event OfferedToTimelock(address indexed token, address indexed timelock);

    error ZeroAddress();
    error OnlyOperator();
    error WindowStillOpen(uint64 endsAt);
    error WindowClosed();

    /// @param token_ The token this manages. At a real launch it does not exist yet: it is the
    ///        address the orchestrator's first CREATE will produce, fixed here so no other
    ///        contract can ever be claimed through this one.
    constructor(PulseBurnLaunch token_, address operator_, address timelock_) {
        if (address(token_) == address(0) || operator_ == address(0) || timelock_ == address(0)) {
            revert ZeroAddress();
        }
        token = token_;
        operator = operator_;
        timelock = timelock_;
    }

    modifier onlyOperator() {
        if (msg.sender != operator) revert OnlyOperator();
        _;
    }

    /// @notice Accepts the ownership the launch offered. Permissionless: it can only move
    ///         ownership INTO this contract, whose powers are fixed. Reverts unless this
    ///         contract is the token's pending owner.
    function claim() external {
        token.acceptOwnership();
        emit Claimed(address(token));
    }

    // --- the window's tools, and nothing else ---------------------------------------------------

    function flagSnipers(address[] calldata accounts) external onlyOperator {
        token.flagSnipers(accounts);
    }

    /// @dev Window-only, unlike the token's own `clearSniper`, so that every power this contract
    ///      holds ends when the window does. Nothing is lost: after the window a flag has no effect.
    function clearSniper(address account) external onlyOperator {
        if (!token.limitsActive()) revert WindowClosed();
        token.clearSniper(account);
    }

    function liftLimitsEarly() external onlyOperator {
        token.liftLimitsEarly();
    }

    // --- afterwards -------------------------------------------------------------------------

    /// @notice Once the window has closed, offer ownership to the timelock. Permissionless, so
    ///         a lost operator key cannot strand the token here.
    function offerToTimelock() external {
        if (token.limitsActive()) revert WindowStillOpen(token.limitsEndAt());
        token.transferOwnership(timelock);
        emit OfferedToTimelock(address(token), timelock);
    }
}
        

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC-20
 * applications.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Skips emitting an {Approval} event indicating an allowance update. This is not
     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.20;

import {Ownable} from "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This extension of the {Ownable} contract includes a two-step mechanism to transfer
 * ownership, where the new owner must call {acceptOwnership} in order to replace the
 * old one. This can help prevent common mistakes, such as transfers of ownership to
 * incorrect accounts, or to contracts that are unable to interact with the
 * permission system.
 *
 * The initial owner is specified at deployment time in the constructor for `Ownable`. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return _pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     *
     * Setting `newOwner` to the zero address is allowed; this can be used to cancel an initiated ownership transfer.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert OwnableUnauthorizedAccount(sender);
        }
        _transferOwnership(sender);
    }
}
          

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Ownable2Step} from "@openzeppelin/contracts/access/Ownable2Step.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

/// @title PulseBurnLaunch
/// @notice Launch-guarded PBURN: fixed 21M cap, 0.3% fee-on-transfer, and anti-snipe
///         limits that **expire on a hard-coded clock and cannot be extended**.
///
/// @dev A SEPARATE CONTRACT FROM `contracts/token/PBURN.sol`, WHICH IS ALREADY DEPLOYED.
///      The live token has no trading gate, no limits and no sniper handling, is immutable,
///      and has renounced its roles to a timelock. Nothing here modifies it.
///
///      WHY EVERY RESTRICTION SUNSETS ON ONE IMMUTABLE TIMESTAMP
///
///      Anti-snipe protection and a honeypot are the same code with different lifetimes.
///      Max-transaction limits, wallet caps, buy/sell cooldowns, sniper flags and the
///      blacklist are *all* gated behind a single check - `block.timestamp < limitsEndAt` -
///      where `limitsEndAt` is written once, in `enableTrading`, and has no setter.
///
///      Consequences worth stating plainly, because they are the point:
///
///      - The owner cannot extend the window. There is no function that writes
///        `limitsEndAt` twice; `enableTrading` reverts if already called.
///      - After the window, `_update` has no path that can block or cap a transfer. Not
///        "the owner promises not to" - the branch does not execute.
///      - `flagSniper` is `onlyWhileLimited`, so it becomes permanently uncallable. A
///        flagged address is blocked from *selling during the window only*, which kills the
///        same-block flip without creating a wallet that can buy and never sell.
///      - Un-flagging is callable at any time, because a function that can only loosen
///        restrictions is not a risk.
///
///      That asymmetry is deliberate: every privileged function here can only reduce
///      restrictions or run out of time. A honeypot checker simulating a sell after
///      `limitsEndAt` gets a clean result, and the reason is structural rather than a
///      promise.
///
///      THE FEE IS NOT PART OF THE ANTI-SNIPE MACHINERY. 0.3% on transfers is the
///      protocol's documented mechanism, routed to a fee recipient that buys and burns. It
///      is capped at `MAX_FEE_BPS` and cannot be raised beyond it, so the "raise the tax to
///      100% after launch" failure mode is unreachable.
contract PulseBurnLaunch is ERC20, Ownable2Step, ReentrancyGuard {
    // --- supply -------------------------------------------------------------

    /// @notice Minted once, in the constructor. There is no other mint path.
    uint256 public constant MAX_SUPPLY = 21_000_000e18;

    uint16 public constant BPS_DENOMINATOR = 10_000;

    // --- fee ----------------------------------------------------------------

    /// @notice Hard ceiling. `setFeeBps` cannot exceed this, so the fee can never be
    ///         raised to a level that blocks selling.
    uint16 public constant MAX_FEE_BPS = 300; // 3%

    uint16 public feeBps = 30; // 0.3%
    address public feeRecipient;

    // --- launch window ------------------------------------------------------

    /// @notice How long the anti-snipe limits last. Compile-time constant, not a parameter.
    uint64 public constant LIMIT_DURATION = 10 minutes;

    /// @notice How long `flagSniper` remains callable. Never longer than LIMIT_DURATION.
    uint64 public constant BLACKLIST_WINDOW = 10 minutes;

    /// @notice Minimum cap sizes, so the owner cannot set limits so low that nobody can
    ///         trade at all. A 0-value max-transaction is a honeypot by another route.
    uint256 public constant MIN_MAX_TX = MAX_SUPPLY / 1000; // 0.1%
    uint256 public constant MIN_MAX_WALLET = MAX_SUPPLY / 500; // 0.2%

    uint32 public constant TRADE_COOLDOWN = 30 seconds;

    bool public tradingEnabled;
    uint64 public launchBlock;

    /// @notice Written exactly once, by `enableTrading`. No setter exists.
    uint64 public limitsEndAt;

    uint256 public maxTxAmount;
    uint256 public maxWalletAmount;

    // --- classification -----------------------------------------------------

    mapping(address => bool) public isExempt; // fee AND limits
    mapping(address => bool) public isPair;
    mapping(address => bool) public isSniper;
    mapping(address => uint64) public lastTradeAt;

    // --- events -------------------------------------------------------------

    event TradingEnabled(uint64 launchBlock, uint64 limitsEndAt, uint256 maxTx, uint256 maxWallet);
    event LimitsLiftedEarly(uint64 at);
    event PairSet(address indexed pair, bool isPair);
    event ExemptSet(address indexed account, bool exempt);
    event SniperFlagged(address indexed account);
    event SniperCleared(address indexed account);
    event FeeRecipientSet(address indexed previous, address indexed current);
    event FeeBpsSet(uint16 previous, uint16 current);

    // --- errors -------------------------------------------------------------

    error TradingNotEnabled();
    error TradingAlreadyEnabled();
    error LimitWindowClosed();
    error MaxTxExceeded(uint256 amount, uint256 limit);
    error MaxWalletExceeded(uint256 balance, uint256 limit);
    error CooldownActive(uint64 until);
    error SniperCannotSellDuringWindow(address account);
    error FeeTooHigh(uint16 requested, uint16 maximum);
    error LimitTooLow(uint256 requested, uint256 minimum);
    error ZeroAddress();

    constructor(address initialOwner, address initialHolder, address feeRecipient_)
        ERC20("PulseBurn", "PBURN")
        Ownable(initialOwner)
    {
        if (initialOwner == address(0) || initialHolder == address(0) || feeRecipient_ == address(0)) {
            revert ZeroAddress();
        }

        feeRecipient = feeRecipient_;

        // Exempt the parties that must move tokens before trading opens, and the fee sink
        // itself - taxing the fee recipient would double-charge every collection.
        isExempt[initialOwner] = true;
        isExempt[initialHolder] = true;
        isExempt[feeRecipient_] = true;
        isExempt[address(this)] = true;

        _mint(initialHolder, MAX_SUPPLY);
    }

    // --- modifiers ----------------------------------------------------------

    modifier onlyWhileLimited() {
        if (!limitsActive()) revert LimitWindowClosed();
        _;
    }

    // --- views --------------------------------------------------------------

    /// @notice True only inside the launch window. Every restriction in this contract is
    ///         gated on this, so when it is false the token is a plain fee-on-transfer
    ///         ERC-20 with no owner-controlled transfer restrictions of any kind.
    function limitsActive() public view returns (bool) {
        return tradingEnabled && block.timestamp < limitsEndAt;
    }

    /// @notice Seconds until every restriction stops applying. Zero once they have.
    ///         Published so a holder can verify the sunset without reading the bytecode.
    function secondsUntilUnrestricted() external view returns (uint64) {
        if (!tradingEnabled) return LIMIT_DURATION;
        if (block.timestamp >= limitsEndAt) return 0;
        return limitsEndAt - uint64(block.timestamp);
    }

    // --- launch -------------------------------------------------------------

    /// @notice Opens trading and starts the limit clock. Callable once, ever.
    ///
    /// @dev The one-way door. `limitsEndAt` is written here and nowhere else, so the
    ///      window cannot be extended by any subsequent call - including by a new owner.
    function enableTrading(uint256 maxTx_, uint256 maxWallet_) external onlyOwner {
        if (tradingEnabled) revert TradingAlreadyEnabled();
        if (maxTx_ < MIN_MAX_TX) revert LimitTooLow(maxTx_, MIN_MAX_TX);
        if (maxWallet_ < MIN_MAX_WALLET) revert LimitTooLow(maxWallet_, MIN_MAX_WALLET);

        tradingEnabled = true;
        launchBlock = uint64(block.number);
        limitsEndAt = uint64(block.timestamp) + LIMIT_DURATION;
        maxTxAmount = maxTx_;
        maxWalletAmount = maxWallet_;

        emit TradingEnabled(launchBlock, limitsEndAt, maxTx_, maxWallet_);
    }

    /// @notice Ends the limit window immediately. Can only shorten it, never extend it.
    function liftLimitsEarly() external onlyOwner onlyWhileLimited {
        limitsEndAt = uint64(block.timestamp);
        emit LimitsLiftedEarly(limitsEndAt);
    }

    // --- owner configuration ------------------------------------------------

    function setPair(address pair, bool value) external onlyOwner {
        if (pair == address(0)) revert ZeroAddress();
        isPair[pair] = value;
        emit PairSet(pair, value);
    }

    function setExempt(address account, bool value) external onlyOwner {
        if (account == address(0)) revert ZeroAddress();
        isExempt[account] = value;
        emit ExemptSet(account, value);
    }

    function setFeeRecipient(address recipient) external onlyOwner {
        if (recipient == address(0)) revert ZeroAddress();
        address previous = feeRecipient;
        feeRecipient = recipient;
        isExempt[recipient] = true;
        emit FeeRecipientSet(previous, recipient);
    }

    function setFeeBps(uint16 newFeeBps) external onlyOwner {
        if (newFeeBps > MAX_FEE_BPS) revert FeeTooHigh(newFeeBps, MAX_FEE_BPS);
        uint16 previous = feeBps;
        feeBps = newFeeBps;
        emit FeeBpsSet(previous, newFeeBps);
    }

    /// @dev Restricted to the launch window by `onlyWhileLimited`, so it stops working on
    ///      its own. Batched because snipers arrive together and each second matters.
    function flagSnipers(address[] calldata accounts) external onlyOwner onlyWhileLimited {
        for (uint256 i = 0; i < accounts.length; ++i) {
            isSniper[accounts[i]] = true;
            emit SniperFlagged(accounts[i]);
        }
    }

    /// @dev Deliberately NOT window-restricted. This can only remove a restriction, and a
    ///      mistaken flag should be correctable for as long as the flag has any effect.
    function clearSniper(address account) external onlyOwner {
        isSniper[account] = false;
        emit SniperCleared(account);
    }

    // --- transfer logic -----------------------------------------------------

    function _update(address from, address to, uint256 value) internal override {
        // Mint and burn bypass every check. Without this the constructor mint would be
        // rejected for exceeding maxWallet before trading is even enabled.
        if (from == address(0) || to == address(0)) {
            super._update(from, to, value);
            return;
        }

        bool exempt = isExempt[from] || isExempt[to];

        if (!exempt) {
            if (!tradingEnabled) revert TradingNotEnabled();
            if (limitsActive()) _enforceLimits(from, to, value);
        }

        uint256 fee = exempt ? 0 : (value * feeBps) / BPS_DENOMINATOR;
        if (fee > 0) {
            super._update(from, feeRecipient, fee);
            unchecked {
                value -= fee;
            }
        }

        super._update(from, to, value);
    }

    /// @dev Only reachable while `limitsActive()`. After the window this function is dead
    ///      code from the transfer path's point of view.
    function _enforceLimits(address from, address to, uint256 value) private {
        bool buying = isPair[from];
        bool selling = isPair[to];

        // Same-block-as-launch buyers are the bots this exists for. They are blocked from
        // SELLING for the remainder of the window only - long enough to defeat the flip,
        // short enough that no wallet is ever permanently trapped.
        if (buying && uint64(block.number) == launchBlock) {
            isSniper[to] = true;
            emit SniperFlagged(to);
        }
        if (selling && isSniper[from]) revert SniperCannotSellDuringWindow(from);

        if (value > maxTxAmount) revert MaxTxExceeded(value, maxTxAmount);

        if (!selling) {
            uint256 resulting = balanceOf(to) + value;
            if (resulting > maxWalletAmount) revert MaxWalletExceeded(resulting, maxWalletAmount);
        }

        // Cooldown applies per wallet across BOTH pools. A sniper rate-limited on
        // PBURN/pFLY must not be able to route around it through PBURN/pCOCK, so the
        // timestamp is keyed on the trader and not on the pair.
        if (buying || selling) {
            address trader = buying ? to : from;
            uint64 nextAllowed = lastTradeAt[trader] + TRADE_COOLDOWN;
            if (lastTradeAt[trader] != 0 && block.timestamp < nextAllowed) {
                revert CooldownActive(nextAllowed);
            }
            lastTradeAt[trader] = uint64(block.timestamp);
        }
    }

    // --- burn ---------------------------------------------------------------

    /// @notice Destroys supply outright. No privileged burn-from exists.
    function burn(uint256 amount) external nonReentrant {
        _burn(msg.sender, amount);
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        _status = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}