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

import "../interfaces/IMarket.sol";
import "../interfaces/IRelayerManager.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

/*───────────────────────────────────────────────────────────────────────
│ Pyth structs                                                           │
└───────────────────────────────────────────────────────────────────────*/
library PythStructs {
    struct Price {
        int64  price;        // raw price
        uint64 conf;         // confidence interval
        int32  expo;         // exponent
        uint64 publishTime;  // unix timestamp (seconds)
    }

    struct PriceFeed {
        bytes32 id;
        Price   price;       // latest price
        Price   emaPrice;    // EMA price
    }
}

/*───────────────────────────────────────────────────────────────────────
│ Interfaces                                                             │
└───────────────────────────────────────────────────────────────────────*/
interface IPyth {
    struct Price {
        int64  price;        // raw price with shared exponent
        uint64 conf;         // confidence interval (same exponent)
        int32  expo;         // shared exponent
        uint256 publishTime; // unix timestamp (seconds)
    }

    function getUpdateFee(bytes[] calldata updateData) external view returns (uint256);
    function updatePriceFeeds(bytes[] calldata updateData) external payable;
    function getPriceUnsafe(bytes32 id) external view returns (Price memory);
    function getPriceNoOlderThan(bytes32 id, uint256 age) external view returns (Price memory);
    function parsePriceFeedUpdates(
        bytes[] calldata updateData,
        bytes32[] calldata priceIds,
        uint64 minPublishTime,
        uint64 maxPublishTime
    ) external payable returns (PythStructs.PriceFeed[] memory priceFeeds);
}

/*───────────────────────────────────────────────────────────────────────
│ PythOracle Contract                                                    │
└───────────────────────────────────────────────────────────────────────*/
contract PythOracle is Initializable {
    IPyth  public PYTH;
    address public relayerManager;

    error ZeroPythAddress();
    error RelayerManagerZero();

    /// reject if |price| / conf ≤ MIN_CONFIDENCE_RATIO  (basis points ⇒ 100 == 1%)
    uint256 public constant MIN_CONFIDENCE_RATIO = 100;
    /// the most negative exponent we accept (-18 ≙ 18 ERC-20 decimals)
    int32   public constant MIN_ACCEPTABLE_EXPO  = -18;

    modifier onlyRelayer() {
        require(
            IRelayerManager(relayerManager).isRelayer(msg.sender),
            "Only Relayer Can Call"
        );
        _;
    }

    function initialize(address _pythAddress, address _relayerManager) external initializer {
        if (_pythAddress == address(0)) revert ZeroPythAddress();
        if (_relayerManager == address(0)) revert RelayerManagerZero();
        PYTH = IPyth(_pythAddress);
        relayerManager = _relayerManager;
    }

    /**
     * @notice Push a Pyth update, evaluate the condition, and settle a market.
     * @param market      The prediction-market contract being settled.
     * @param updateData  Raw Pyth price-feed update packets.
     */
    function updatePriceAndFulfill(
        address market,
        bytes[] calldata updateData
    ) external onlyRelayer payable {
        require(market != address(0), "Oracle: zero market");
        require(updateData.length > 0,  "Oracle: empty update");

        /*── 1. Pay Pyth fee and publish the update ───────────────────*/
        uint256 fee = PYTH.getUpdateFee(updateData);
        require(msg.value >= fee, "Oracle: fee too low");

        /*── 2. Pull market parameters ────────────────────────────────*/
        IMarket.TriggerCondition memory tc = IMarket(market).getMarketParams();
        bytes32[] memory priceIds = new bytes32[](1);
        priceIds[0] = tc.assetId;

        /*── 3. Fetch and validate a fresh price ──────────────────────*/
        PythStructs.PriceFeed[] memory feeds =
            PYTH.parsePriceFeedUpdates{ value: fee }(
                updateData,
                priceIds,
                0,
                uint64(block.timestamp)
            );

        // 5) Use the single feed we requested
        PythStructs.PriceFeed memory feed = feeds[0];
        _validatePriceStruct(feed.price.price, feed.price.conf, feed.price.expo);

        int256 triggerPx = int256(uint256(tc.triggerPrice));
        int256 oraclePx  = int256(feed.price.price);

        uint256 winningToken;
        if (tc.op == IMarket.Operator.LT) {
            winningToken = (oraclePx <= triggerPx) ? 1 : 2;
        } else { // GT
            winningToken = (oraclePx >= triggerPx) ? 1 : 2;
        }

        /*── 5. Resolve the market ───────────────────────────────────*/
        IMarket(market).resolveMarketOracle(winningToken);

        /*── 6. Refund any excess ETH ────────────────────────────────*/
        uint256 refund = msg.value - fee;
        if (refund != 0) payable(msg.sender).transfer(refund);
    }

    /*───────────────────────────────────────────────────────────────────
    │ Internal helpers                                                  │
    ───────────────────────────────────────────────────────────────────*/

    /// Implements Pyth best-practice checks.
    function _validatePriceStruct(int64 _price, uint64 _conf, int32 _expo) internal pure {
        // 1) non-positive price
        require(_price > 0, "Oracle: invalid price");

        // 2) exponent too negative
        require(_expo >= MIN_ACCEPTABLE_EXPO, "Oracle: invalid expo");

        // 3) confidence too wide: require |price|/conf > MIN_CONFIDENCE_RATIO (bp)
        require(
            _conf > 0 &&
            uint256(int256(_price)) * 1e4 / uint256(_conf) > MIN_CONFIDENCE_RATIO,
            "Oracle: untrusted price"
        );
    }

    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _getInitializableStorage()._initializing;
    }

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

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

interface IMarket {
    enum Operator { GT, LT }
    struct TriggerCondition {
        uint256 triggerPrice;
        Operator op;
        bytes32  assetId;
    }

    function getMarketParams()
        external
        view
        returns (IMarket.TriggerCondition memory);

    function resolveMarketOracle(uint256 winningToken) external;
}

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

interface IRelayerManager {
    function isRelayer(address relayer) external view returns (bool);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "viaIR": true,
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

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[{"inputs":[],"name":"InvalidInitialization","type":"error"},{"inputs":[],"name":"NotInitializing","type":"error"},{"inputs":[],"name":"RelayerManagerZero","type":"error"},{"inputs":[],"name":"ZeroPythAddress","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint64","name":"version","type":"uint64"}],"name":"Initialized","type":"event"},{"inputs":[],"name":"MIN_ACCEPTABLE_EXPO","outputs":[{"internalType":"int32","name":"","type":"int32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MIN_CONFIDENCE_RATIO","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PYTH","outputs":[{"internalType":"contract IPyth","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_pythAddress","type":"address"},{"internalType":"address","name":"_relayerManager","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"relayerManager","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"market","type":"address"},{"internalType":"bytes[]","name":"updateData","type":"bytes[]"}],"name":"updatePriceAndFulfill","outputs":[],"stateMutability":"payable","type":"function"}]

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