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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./LMSRMath.sol";

contract Market is Ownable, Pausable, ReentrancyGuard {
    // State variables
    address public factory;
    address public feeRecipient;
    address public reporter;
    address public governor;
    address public susdToken;
    uint256 public b;
    uint256 public resolutionDelay;
    uint256 public tradingFee;
    uint256 public disputeBondAmount;
    uint256 public reporterResolutionDeadline;
    uint256 public resolutionTimestamp;
    uint256 public totalVotes;
    uint256 public mostVotedOutcome;
    uint256 public winningOutcome;
    bool public resolved;

    string[] public outcomes;
    mapping(uint256 => uint256) public outcomeShares;
    mapping(address => mapping(uint256 => uint256)) public userShares;
    mapping(address => uint256) public disputeBonds;
    mapping(uint256 => uint256) public disputeVotes;
    mapping(address => bool) public hasVoted;

    uint256 public constant DISPUTE_PERIOD = 7 days;
    uint256 public constant MAX_TRADE_PERCENTAGE = 10;

    // Events
    event Trade(
        address indexed user,
        int256[] amounts,
        uint256[] shareBalances,
        uint256 feesPaid
    );
    event MarketResolved(uint256 indexed outcome);
    event ResolutionProposed(uint256 indexed outcome, uint256 resolutionTimestamp);
    event DisputeSubmitted(
        address indexed disputer,
        uint256 indexed proposedOutcome,
        uint256 bondAmount
    );
    event VoteCast(address indexed voter, uint256 indexed outcome);
    event Payout(address indexed user, uint256 amount);
    event ReporterDeadlineSet(uint256 deadline);
    event EmergencyResolution(uint256 indexed outcome, address resolver);

    struct MarketParams {
        string[] outcomes;
        address feeRecipient;
        uint256 resolutionDelay;
        address reporter;
        address governor;
        uint256 b;
        uint256 tradingFee;
        address susdToken;
        uint256 disputeBondAmount;
    }

    constructor(
        string[] memory _outcomes,
        address _feeRecipient,
        uint256 _resolutionDelay,
        address _reporter,
        address _governor,
        uint256 _b,
        uint256 _tradingFee,
        address _susdToken,
        uint256 _disputeBondAmount
    ) Ownable(_governor) Pausable() ReentrancyGuard() {


        require(_outcomes.length >= 2, "Must have at least 2 outcomes");
        require(_feeRecipient != address(0), "Invalid fee recipient");
        require(_reporter != address(0), "Invalid reporter");
        require(_governor != address(0), "Invalid governor");
        require(_susdToken != address(0), "Invalid SUSD token");
        require(_b > 0, "Invalid liquidity parameter");

        factory = msg.sender;
        feeRecipient = _feeRecipient;
        reporter = _reporter;
        governor = _governor;
        susdToken = _susdToken;
        b = _b;
        resolutionDelay = _resolutionDelay;
        tradingFee = _tradingFee;
        disputeBondAmount = _disputeBondAmount;

        for (uint256 i = 0; i < _outcomes.length; i++) {
            outcomes.push(_outcomes[i]);
            outcomeShares[i] = 1e18;
        }

        reporterResolutionDeadline = block.timestamp + 30 days;
        emit ReporterDeadlineSet(reporterResolutionDeadline);

        _transferOwnership(governor);
    }

    // Modifiers
    modifier onlyReporter() {
        require(msg.sender == reporter, "Only reporter can call this function");
        _;
    }

    modifier onlyGovernor() {
        require(msg.sender == governor, "Only governor can call this function");
        _;
    }

    modifier onlyFactory() {
        require(msg.sender == factory, "Only factory can call this function");
        _;
    }

    // Existing Market contract functions
    function getCurrentShares() public view returns (uint256[] memory) {
        uint256[] memory shares = new uint256[](outcomes.length);
        for (uint256 i = 0; i < outcomes.length; i++) {
            shares[i] = outcomeShares[i];
        }
        return shares;
    }

    function getCost(int256[] memory shareDeltas) public view returns (int256) {
        require(shareDeltas.length == outcomes.length, "Invalid array length");
        
        // Get current shares
        uint256[] memory shares = getCurrentShares();
        
        // Calculate cost using LMSR math
        return LMSRMath.calcCost(shares, shareDeltas, b);
    }

    function getNetCost(int256[] memory shareDeltas) public view returns (uint256) {
        int256 cost = getCost(shareDeltas);
        
        // If cost is negative (selling), return 0 as net cost
        if (cost <= 0) return 0;
        
        // Apply trading fee
        uint256 fee = (uint256(cost) * tradingFee) / 10000;
        return uint256(cost) + fee;
    }

    function getMarginalPrice(uint256 outcomeIndex) public view returns (uint256) {
        require(outcomeIndex < outcomes.length, "Invalid outcome index");
        
        uint256[] memory shares = getCurrentShares();
        return LMSRMath.calcMarginalPrice(outcomeIndex, shares, b);
    }

    function trade(int256[] calldata shareDeltas, uint256 maxCost) external nonReentrant whenNotPaused {
        // CHECKS
        require(!resolved, "Market already resolved");
        require(shareDeltas.length == outcomes.length, "Invalid array length");
        
        // Validate trade size to prevent manipulation
        uint256[] memory shares = getCurrentShares();
        for (uint256 i = 0; i < shareDeltas.length; i++) {
            if (shareDeltas[i] > 0) {
                // Ensure buy orders don't exceed maximum percentage of current market shares
                require(
                    uint256(shareDeltas[i]) <= (shares[i] * MAX_TRADE_PERCENTAGE) / 100,
                    "Trade size too large"
                );
            } else if (shareDeltas[i] < 0) {
                // Ensure sell orders don't exceed user's balance
                require(
                    uint256(-shareDeltas[i]) <= userShares[msg.sender][i],
                    "Insufficient shares"
                );
            }
        }
        
        // Calculate cost using LMSR
        int256 cost = getCost(shareDeltas);
        
        // Apply trading fee (only for buys)
        uint256 fee = 0;
        uint256 tradeTotalCost = 0;
        if (cost > 0) {
            fee = (uint256(cost) * tradingFee) / 10000;
            tradeTotalCost = uint256(cost) + fee;
            
            // Slippage protection
            require(tradeTotalCost <= maxCost, "Slippage exceeded");
        }
        
        // EFFECTS
        // Update state variables
        for (uint256 i = 0; i < shareDeltas.length; i++) {
            if (shareDeltas[i] > 0) {
                outcomeShares[i] += uint256(shareDeltas[i]);
                userShares[msg.sender][i] += uint256(shareDeltas[i]);
            } else if (shareDeltas[i] < 0) {
                outcomeShares[i] -= uint256(-shareDeltas[i]);
                userShares[msg.sender][i] -= uint256(-shareDeltas[i]);
            }
        }
        
        if (cost > 0) {
            // User is buying, transfer SUSD from user
            require(
                IERC20(susdToken).transferFrom(msg.sender, address(this), uint256(cost)),
                "Trade transfer failed"
            );
            
            // Transfer fee
            if (fee > 0) {
                require(
                    IERC20(susdToken).transferFrom(msg.sender, feeRecipient, fee),
                    "Fee transfer failed"
                );
            }
        } else if (cost < 0) {
            // User is selling, transfer SUSD to user
            require(
                IERC20(susdToken).transfer(msg.sender, uint256(-cost)),
                "Payout transfer failed"
            );
        }
        
        // Get updated share balances for the event
        uint256[] memory newBalances = getCurrentShares();
        emit Trade(msg.sender, shareDeltas, newBalances, fee);
    }

    function resolveMarket(uint256 outcome) external onlyReporter {
        require(!resolved, "Market already resolved");
        require(block.timestamp >= reporterResolutionDeadline, "Too early");
        require(outcome < outcomes.length, "Invalid outcome");

        winningOutcome = outcome;
        resolutionTimestamp = block.timestamp;
        resolved = true;

        emit ResolutionProposed(outcome, resolutionTimestamp);
        emit MarketResolved(outcome);
    }

    function overrideResolution(uint256 outcome) external onlyGovernor {
        require(!resolved, "Market already resolved");
        require(block.timestamp < resolutionTimestamp, "Dispute period ended");
        require(outcome < outcomes.length, "Invalid outcome");
        
        resolved = true;
        winningOutcome = outcome;
        resolutionTimestamp = 0;
        
        emit MarketResolved(outcome);
    }

    function payout() external nonReentrant {
        require(resolved, "Market not resolved");
        uint256 shares = userShares[msg.sender][winningOutcome];
        require(shares > 0, "No winning shares");
        
        uint256 payoutAmount = shares;
        userShares[msg.sender][winningOutcome] = 0;
        
        require(IERC20(susdToken).transfer(msg.sender, payoutAmount), "Payout transfer failed");
        
        emit Payout(msg.sender, payoutAmount);
    }
    
    // Dispute mechanism for users
    function submitDispute(uint256 proposedOutcome) external nonReentrant {
        require(!resolved, "Market already resolved");
        require(proposedOutcome < outcomes.length, "Invalid outcome");
        require(!hasVoted[msg.sender], "Already voted");
        require(block.timestamp <= resolutionTimestamp + DISPUTE_PERIOD, "Dispute period ended");
        require(IERC20(susdToken).transferFrom(msg.sender, address(this), disputeBondAmount), "Bond transfer failed");

        disputeBonds[msg.sender] = disputeBondAmount;
        disputeVotes[proposedOutcome] += disputeBondAmount;
        totalVotes += disputeBondAmount;
        hasVoted[msg.sender] = true;

        if (disputeVotes[proposedOutcome] > disputeVotes[mostVotedOutcome]) {
            mostVotedOutcome = proposedOutcome;
        }

        emit DisputeSubmitted(msg.sender, proposedOutcome, disputeBondAmount);
        emit VoteCast(msg.sender, proposedOutcome);
    }
    
    function finalizeDispute() external nonReentrant {
        require(!resolved, "Market already resolved");
        require(block.timestamp > resolutionTimestamp + DISPUTE_PERIOD, "Dispute period not ended");
        require(totalVotes > 0, "No disputes submitted");

        winningOutcome = mostVotedOutcome;
        resolved = true;

        emit MarketResolved(mostVotedOutcome);
    }

    function claimDisputeBond() external nonReentrant {
        require(resolved, "Market not resolved");
        require(disputeBonds[msg.sender] > 0, "No bond to claim");
        require(block.timestamp > resolutionTimestamp + DISPUTE_PERIOD, "Dispute period not ended");

        uint256 bondAmount = disputeBonds[msg.sender];
        disputeBonds[msg.sender] = 0;

        // If voted for winning outcome, get reward from losing votes
        if (hasVoted[msg.sender]) {
            uint256 shareOfWinningVotes = (bondAmount * 1e18) / disputeVotes[winningOutcome];
            bondAmount += (totalVotes - disputeVotes[winningOutcome]) * shareOfWinningVotes / 1e18;
        }

        require(IERC20(susdToken).transfer(msg.sender, bondAmount), "Bond return failed");
    }

    // Emergency resolution if reporter never resolves
    function emergencyResolve() external {
        require(!resolved, "Market already resolved");
        require(block.timestamp > reporterResolutionDeadline, "Reporter deadline not passed");
        
        // If disputes exist, use most voted outcome
        uint256 finalOutcome = totalVotes > 0 ? mostVotedOutcome : 0;
        
        resolved = true;
        winningOutcome = finalOutcome;
        
        emit EmergencyResolution(finalOutcome, msg.sender);
        emit MarketResolved(finalOutcome);
    }
    
    // Allow governor to set a new reporter deadline
    function setReporterDeadline(uint256 newDeadline) external onlyGovernor {
        require(newDeadline > block.timestamp, "Deadline must be in future");
        reporterResolutionDeadline = newDeadline;
        emit ReporterDeadlineSet(newDeadline);
    }
    
    function verifyInitialization(
        string[] calldata _outcomes,
        uint256 _resolutionDelay,
        address _reporter,
        address _governor
    ) external view returns (bool) {
        // Verify that initialization parameters match
        if (_outcomes.length != outcomes.length) return false;
        if (_reporter != reporter) return false;
        if (_governor != governor) return false;
        if (_resolutionDelay != resolutionDelay) return false;
        
        // Verify outcomes match
        for (uint256 i = 0; i < _outcomes.length; i++) {
            if (keccak256(bytes(_outcomes[i])) != keccak256(bytes(outcomes[i]))) {
                return false;
            }
        }
        
        return true;
    }

    // View functions
    function getMarketInfo() external view returns (
        string[] memory,
        uint256[] memory,
        uint256,
        bool,
        uint256
    ) {
        uint256[] memory shares = getCurrentShares();
        return (outcomes, shares, b, resolved, winningOutcome);
    }

    function getResolutionDelay() external view returns (uint256) {
        return resolutionDelay;
    }

    function getProposedOutcome() external view returns (uint256) {
        return winningOutcome;
    }

    function getResolutionTimestamp() external view returns (uint256) {
        return resolutionTimestamp;
    }

    function getReporter() external view returns (address) {
        return reporter;
    }

    function getGovernor() external view returns (address) {
        return governor;
    }

    function getAIAddress() external view returns (address) {
        return address(this);
    }

    function getTradingFee() external view returns (uint256) {
        return tradingFee;
    }

    // Pause/unpause functions
    function pause() external onlyOwner {
        _pause();
    }
    
    function unpause() external onlyOwner {
        _unpause();
    }
}

// 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 v5.1.0) (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 v5.0.1) (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 v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// 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
pragma solidity ^0.8.19;


library LMSRMath {
    // Fixed point precision
    uint256 constant FIXED_ONE = 1e18;
    
    // Maximum value for exponentiation to avoid overflow
    uint256 constant MAX_EXPONENT = 100e18;
    
    
    function calcCost(
        uint256[] memory outcomeShares,
        int256[] memory shareDeltas,
        uint256 b
    ) internal pure returns (int256) {
        require(outcomeShares.length == shareDeltas.length, "Array length mismatch");
        require(outcomeShares.length > 0, "Empty arrays");
        require(b > 0, "Invalid liquidity parameter");
        
        // Calculate cost before trade
        uint256 costBefore = calcCostFromShares(outcomeShares, b);
        
        // Calculate new outcome shares after trade
        uint256[] memory newShares = new uint256[](outcomeShares.length);
        for (uint256 i = 0; i < outcomeShares.length; i++) {
            if (shareDeltas[i] >= 0) {
                newShares[i] = outcomeShares[i] + uint256(shareDeltas[i]);
            } else {
                require(outcomeShares[i] >= uint256(-shareDeltas[i]), "Insufficient shares");
                newShares[i] = outcomeShares[i] - uint256(-shareDeltas[i]);
            }
        }
        
        // Calculate cost after trade
        uint256 costAfter = calcCostFromShares(newShares, b);
        
        // Return difference in costs
        if (costAfter >= costBefore) {
            return int256(costAfter - costBefore);
        } else {
            return -int256(costBefore - costAfter);
        }
    }
    

    function calcCostFromShares(
        uint256[] memory shares,
        uint256 b
    ) internal pure returns (uint256) {
        uint256 sum = 0;
        
        // Calculate sum of exp(q_i/b) for all outcomes
        for (uint256 i = 0; i < shares.length; i++) {
            // Normalize shares by dividing by b
            uint256 normalizedShares = (shares[i] * FIXED_ONE) / b;
            
            // Prevent overflow by capping the exponent
            if (normalizedShares > MAX_EXPONENT) {
                normalizedShares = MAX_EXPONENT;
            }
            
            // Calculate exp(q_i/b) and add to sum
            sum += exp(normalizedShares);
        }
        
        // Calculate b * ln(sum)
        return (b * ln(sum)) / FIXED_ONE;
    }
    

    function calcMarginalPrice(
        uint256 outcomeIndex,
        uint256[] memory shares,
        uint256 b
    ) internal pure returns (uint256) {
        require(outcomeIndex < shares.length, "Invalid outcome index");
        
        // Calculate sum of exp(q_i/b) for all outcomes
        uint256 sum = 0;
        for (uint256 i = 0; i < shares.length; i++) {
            uint256 normalizedShares = (shares[i] * FIXED_ONE) / b;
            if (normalizedShares > MAX_EXPONENT) {
                normalizedShares = MAX_EXPONENT;
            }
            sum += exp(normalizedShares);
        }
        
        // Calculate exp(q_i/b) for the specific outcome
        uint256 normalizedOutcomeShares = (shares[outcomeIndex] * FIXED_ONE) / b;
        if (normalizedOutcomeShares > MAX_EXPONENT) {
            normalizedOutcomeShares = MAX_EXPONENT;
        }
        uint256 outcomeExp = exp(normalizedOutcomeShares);
        
        // Calculate price = exp(q_i/b) / sum(exp(q_j/b))
        return (outcomeExp * FIXED_ONE) / sum;
    }
    

    function exp(uint256 x) internal pure returns (uint256) {
        // If x is 0, e^0 = 1
        if (x == 0) return FIXED_ONE;
        
        // If x is very large, return maximum value to avoid overflow
        if (x > MAX_EXPONENT) return type(uint256).max;
        
        // Taylor series approximation for e^x
        // e^x = 1 + x + x^2/2! + x^3/3! + ... + x^n/n!
        uint256 result = FIXED_ONE;  // 1
        uint256 term = FIXED_ONE;    // Start with 1
        
        // Add x
        term = (term * x) / FIXED_ONE;
        result += term;
        
        // Add x^2/2!
        term = (term * x) / (2 * FIXED_ONE);
        result += term;
        
        // Add x^3/3!
        term = (term * x) / (3 * FIXED_ONE);
        result += term;
        
        // Add x^4/4!
        term = (term * x) / (4 * FIXED_ONE);
        result += term;
        
        // Add x^5/5!
        term = (term * x) / (5 * FIXED_ONE);
        result += term;
        
        // Add x^6/6!
        term = (term * x) / (6 * FIXED_ONE);
        result += term;
        
        // Add x^7/7!
        term = (term * x) / (7 * FIXED_ONE);
        result += term;
        
        // Add x^8/8!
        term = (term * x) / (8 * FIXED_ONE);
        result += term;
        
        return result;
    }
    

    function ln(uint256 x) internal pure returns (uint256) {
        // If x is 0 or very small, return a very negative number
        // In practice, this should never happen in LMSR
        if (x < FIXED_ONE / 1000) {
            return 0; // Should revert in practice
        }
        
        // If x is 1, ln(1) = 0
        if (x == FIXED_ONE) return 0;
        
        // If x < 1, use ln(x) = -ln(1/x)
        if (x < FIXED_ONE) {
            return type(uint256).max - ln((FIXED_ONE * FIXED_ONE) / x) + 1;
        }
        
        // For x > 1, use binary search to find y such that e^y = x
        uint256 low = 0;
        uint256 high = MAX_EXPONENT;
        uint256 mid;
        uint256 midExp;
        
        // Binary search for 32 iterations (sufficient precision)
        for (uint256 i = 0; i < 32; i++) {
            mid = (low + high) / 2;
            midExp = exp(mid);
            
            if (midExp < x) {
                low = mid;
            } else if (midExp > x) {
                high = mid;
            } else {
                return mid; // Exact match found
            }
        }
        
        // Return the closest approximation
        return (low + high) / 2;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "viaIR": true,
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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nonpayable","type":"function"},{"inputs":[],"name":"getAIAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"int256[]","name":"shareDeltas","type":"int256[]"}],"name":"getCost","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentShares","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getGovernor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"outcomeIndex","type":"uint256"}],"name":"getMarginalPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMarketInfo","outputs":[{"internalType":"string[]","name":"","type":"string[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"int256[]","name":"shareDeltas","type":"int256[]"}],"name":"getNetCost","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getProposedOutcome","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getReporter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getResolutionDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getResolutionTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTradingFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"hasVoted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mostVotedOutcome","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"outcomeShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"outcomes","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"outcome","type":"uint256"}],"name":"overrideResolution","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"payout","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reporter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"reporterResolutionDeadline","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"resolutionDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"resolutionTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"outcome","type":"uint256"}],"name":"resolveMarket","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"resolved","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newDeadline","type":"uint256"}],"name":"setReporterDeadline","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"proposedOutcome","type":"uint256"}],"name":"submitDispute","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"susdToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"int256[]","name":"shareDeltas","type":"int256[]"},{"internalType":"uint256","name":"maxCost","type":"uint256"}],"name":"trade","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tradingFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"userShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string[]","name":"_outcomes","type":"string[]"},{"internalType":"uint256","name":"_resolutionDelay","type":"uint256"},{"internalType":"address","name":"_reporter","type":"address"},{"internalType":"address","name":"_governor","type":"address"}],"name":"verifyInitialization","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"winningOutcome","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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