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// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import {AggregatorV3Interface} from "src/interfaces/AggregatorV3Interface.sol";
import {BaseFeedCurveLPTAssetSNG} from "src/spectra-oracles/chainlinkFeeds/stableswap-ng/BaseFeedCurveLPTAsset.sol";
import {OwnableUpgradeable} from "openzeppelin-contracts-upgradeable/access/OwnableUpgradeable.sol";

/**
 * @title PriceFeedCurveLPTAssetSNG
 * @notice Curve PT price feed that gives the LPT price in a provided IBT/PT Curve Pool in asset
 * @notice Designed to be used with stableswap-ng pools
 */
contract PriceFeedCurveLPTAssetSNG is BaseFeedCurveLPTAssetSNG, OwnableUpgradeable {
    string public constant description = "IBT/PT Curve Pool Oracle: LPT price in asset";

    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializes the oracle
     * @param _pt The principal token address
     * @param _pool The pool address
     */
    function initialize(address _pt, address _pool) external initializer {
        __BaseFeedCurveLPTAssetSNG_init(_pt, _pool);
    }
}

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

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
    struct OwnableStorage {
        address _owner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;

    function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
        assembly {
            $.slot := OwnableStorageLocation
        }
    }

    /**
     * @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.
     */
    function __Ownable_init(address initialOwner) internal onlyInitializing {
        __Ownable_init_unchained(initialOwner);
    }

    function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
        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) {
        OwnableStorage storage $ = _getOwnableStorage();
        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 {
        OwnableStorage storage $ = _getOwnableStorage();
        address oldOwner = $._owner;
        $._owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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 reininitialization) 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 Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

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

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC3156FlashBorrower.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC3156 FlashBorrower, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 */
interface IERC3156FlashBorrower {
    /**
     * @dev Receive a flash loan.
     * @param initiator The initiator of the loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param fee The additional amount of tokens to repay.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     * @return The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"
     */
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC3156FlashLender.sol)

pragma solidity ^0.8.20;

import {IERC3156FlashBorrower} from "./IERC3156FlashBorrower.sol";

/**
 * @dev Interface of the ERC3156 FlashLender, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 */
interface IERC3156FlashLender {
    /**
     * @dev The amount of currency available to be lended.
     * @param token The loan currency.
     * @return The amount of `token` that can be borrowed.
     */
    function maxFlashLoan(address token) external view returns (uint256);

    /**
     * @dev The fee to be charged for a given loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @return The amount of `token` to be charged for the loan, on top of the returned principal.
     */
    function flashFee(address token, uint256 amount) external view returns (uint256);

    /**
     * @dev Initiate a flash loan.
     * @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     */
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC4626.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 */
interface IERC4626 is IERC20, IERC20Metadata {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed sender,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /**
     * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
     *
     * - MUST be an ERC-20 token contract.
     * - MUST NOT revert.
     */
    function asset() external view returns (address assetTokenAddress);

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - SHOULD include any compounding that occurs from yield.
     * - MUST be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT revert.
     */
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /**
     * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - MUST return a limited value if receiver is subject to some deposit limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
     * - MUST NOT revert.
     */
    function maxDeposit(address receiver) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
     *   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
     *   in the same transaction.
     * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
     *   deposit would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewDeposit(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   deposit execution, and are accounted for during deposit.
     * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - MUST return a limited value if receiver is subject to some mint limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
     * - MUST NOT revert.
     */
    function maxMint(address receiver) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
     *   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
     *   same transaction.
     * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
     *   would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by minting.
     */
    function previewMint(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
     *   execution, and are accounted for during mint.
     * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
     *   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
     *   called
     *   in the same transaction.
     * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
     *   the withdrawal would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewWithdraw(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   withdraw execution, and are accounted for during withdraw.
     * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
     *   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
     *   same transaction.
     * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
     *   redemption would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by redeeming.
     */
    function previewRedeem(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   redeem execution, and are accounted for during redeem.
     * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Interface for the optional metadata functions from the ERC20 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 v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // ? `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // ? `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

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

/// @dev Interface of Chainlink v3 aggregator, as defined in
// https://github.com/smartcontractkit/chainlink/blob/develop/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol
// solhint-disable-next-line interface-starts-with-i
interface AggregatorV3Interface {
    function decimals() external view returns (uint8);

    function description() external view returns (string memory);

    function version() external view returns (uint256);

    function getRoundData(
        uint80 _roundId
    )
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );

    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import {IERC20Metadata} from "openzeppelin-contracts/token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface for Curve TwoCrypto-NG pool
 */
interface ICurveNGPool is IERC20Metadata {
    function coins(uint256 index) external view returns (address);

    function balances(uint256 index) external view returns (uint256);

    function A() external view returns (uint256);

    function gamma() external view returns (uint256);

    function D() external view returns (uint256);

    function token() external view returns (address);

    function price_scale() external view returns (uint256);

    function price_oracle() external view returns (uint256);

    function future_A_gamma_time() external view returns (uint256);

    function future_A_gamma() external view returns (uint256);

    function initial_A_gamma_time() external view returns (uint256);

    function initial_A_gamma() external view returns (uint256);

    function fee_gamma() external view returns (uint256);

    function mid_fee() external view returns (uint256);

    function out_fee() external view returns (uint256);

    function allowed_extra_profit() external view returns (uint256);

    function adjustment_step() external view returns (uint256);

    function admin_fee() external view returns (uint256);

    function ma_time() external view returns (uint256);

    function get_virtual_price() external view returns (uint256);

    function fee() external view returns (uint256);

    function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256);

    function get_dx(uint256 i, uint256 j, uint256 dy) external view returns (uint256);

    function last_prices() external view returns (uint256);

    function calc_token_amount(
        uint256[2] calldata amounts,
        bool deposit
    ) external view returns (uint256);

    function calc_withdraw_one_coin(
        uint256 _token_amount,
        uint256 i
    ) external view returns (uint256);

    function exchange(uint256 i, uint256 j, uint256 dx, uint256 min_dy) external returns (uint256);

    function exchange(
        uint256 i,
        uint256 j,
        uint256 dx,
        uint256 min_dy,
        address receiver
    ) external returns (uint256);

    function add_liquidity(
        uint256[2] calldata amounts,
        uint256 min_mint_amount
    ) external returns (uint256);

    function add_liquidity(
        uint256[2] calldata amounts,
        uint256 min_mint_amount,
        address receiver
    ) external returns (uint256);

    function remove_liquidity(uint256 amount, uint256[2] calldata min_amounts) external;

    function remove_liquidity(
        uint256 amount,
        uint256[2] calldata min_amounts,
        address receiver
    ) external;

    function remove_liquidity_one_coin(
        uint256 token_amount,
        uint256 i,
        uint256 min_amount
    ) external;

    function remove_liquidity_one_coin(
        uint256 token_amount,
        uint256 i,
        uint256 min_amount,
        address receiver
    ) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import "openzeppelin-contracts/interfaces/IERC20.sol";
import "openzeppelin-contracts/interfaces/IERC20Metadata.sol";
import "openzeppelin-contracts/interfaces/IERC3156FlashLender.sol";

interface IPrincipalToken is IERC20, IERC20Metadata, IERC3156FlashLender {
    /* ERRORS
     *****************************************************************************************************************/

    error InvalidDecimals();
    error BeaconNotSet();
    error PTExpired();
    error PTNotExpired();
    error RateError();
    error AddressError();
    error UnauthorizedCaller();
    error RatesAtExpiryAlreadyStored();
    error ERC5143SlippageProtectionFailed();
    error InsufficientBalance();
    error FlashLoanExceedsMaxAmount();
    error FlashLoanCallbackFailed();
    error NoRewardsProxy();
    error ClaimRewardsFailed();

    /* Functions
     *****************************************************************************************************************/

    function initialize(address _ibt, uint256 _duration, address initialAuthority) external;

    /**
     * @notice Toggle Pause
     * @dev Should only be called in extraordinary situations by the admin of the contract
     */
    function pause() external;

    /**
     * @notice Toggle UnPause
     * @dev Should only be called in extraordinary situations by the admin of the contract
     */
    function unPause() external;

    /**
     * @notice Deposits amount of assets in the PT vault
     * @param assets The amount of assets being deposited
     * @param receiver The receiver address of the shares
     * @return shares The amount of shares minted (same amount for PT & yt)
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @notice Deposits amount of assets in the PT vault
     * @param assets The amount of assets being deposited
     * @param ptReceiver The receiver address of the PTs
     * @param ytReceiver the receiver address of the YTs
     * @return shares The amount of shares minted (same amount for PT & yt)
     */
    function deposit(
        uint256 assets,
        address ptReceiver,
        address ytReceiver
    ) external returns (uint256 shares);

    /**
     * @notice Deposits amount of assets with a lower bound on shares received
     * @param assets The amount of assets being deposited
     * @param ptReceiver The receiver address of the PTs
     * @param ytReceiver The receiver address of the YTs
     * @param minShares The minimum allowed shares from this deposit
     * @return shares The amount of shares actually minted to the receiver
     */
    function deposit(
        uint256 assets,
        address ptReceiver,
        address ytReceiver,
        uint256 minShares
    ) external returns (uint256 shares);

    /**
     * @notice Same as normal deposit but with IBTs
     * @param ibts The amount of IBT being deposited
     * @param receiver The receiver address of the shares
     * @return shares The amount of shares minted to the receiver
     */
    function depositIBT(uint256 ibts, address receiver) external returns (uint256 shares);

    /**
     * @notice Same as normal deposit but with IBTs
     * @param ibts The amount of IBT being deposited
     * @param ptReceiver The receiver address of the PTs
     * @param ytReceiver the receiver address of the YTs
     * @return shares The amount of shares minted to the receiver
     */
    function depositIBT(
        uint256 ibts,
        address ptReceiver,
        address ytReceiver
    ) external returns (uint256 shares);

    /**
     * @notice Same as normal deposit but with IBTs
     * @param ibts The amount of IBT being deposited
     * @param ptReceiver The receiver address of the PTs
     * @param ytReceiver The receiver address of the YTs
     * @param minShares The minimum allowed shares from this deposit
     * @return shares The amount of shares minted to the receiver
     */
    function depositIBT(
        uint256 ibts,
        address ptReceiver,
        address ytReceiver,
        uint256 minShares
    ) external returns (uint256 shares);

    /**
     * @notice Burns owner's shares (PTs and YTs before expiry, PTs after expiry)
     * and sends assets to receiver
     * @param shares The amount of shares to burn
     * @param receiver The address that will receive the assets
     * @param owner The owner of the shares
     * @return assets The actual amount of assets received for burning the shares
     */
    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) external returns (uint256 assets);

    /**
     * @notice Burns owner's shares (PTs and YTs before expiry, PTs after expiry)
     * and sends assets to receiver
     * @param shares The amount of shares to burn
     * @param receiver The address that will receive the assets
     * @param owner The owner of the shares
     * @param minAssets The minimum assets that should be returned to user
     * @return assets The actual amount of assets received for burning the shares
     */
    function redeem(
        uint256 shares,
        address receiver,
        address owner,
        uint256 minAssets
    ) external returns (uint256 assets);

    /**
     * @notice Burns owner's shares (PTs and YTs before expiry, PTs after expiry)
     * and sends IBTs to receiver
     * @param shares The amount of shares to burn
     * @param receiver The address that will receive the IBTs
     * @param owner The owner of the shares
     * @return ibts The actual amount of IBT received for burning the shares
     */
    function redeemForIBT(
        uint256 shares,
        address receiver,
        address owner
    ) external returns (uint256 ibts);

    /**
     * @notice Burns owner's shares (PTs and YTs before expiry, PTs after expiry)
     * and sends IBTs to receiver
     * @param shares The amount of shares to burn
     * @param receiver The address that will receive the IBTs
     * @param owner The owner of the shares
     * @param minIbts The minimum IBTs that should be returned to user
     * @return ibts The actual amount of IBT received for burning the shares
     */
    function redeemForIBT(
        uint256 shares,
        address receiver,
        address owner,
        uint256 minIbts
    ) external returns (uint256 ibts);

    /**
     * @notice Burns owner's shares (before expiry : PTs and YTs) and sends assets to receiver
     * @param assets The amount of assets to be received
     * @param receiver The address that will receive the assets
     * @param owner The owner of the shares (PTs and YTs)
     * @return shares The actual amount of shares burnt for receiving the assets
     */
    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) external returns (uint256 shares);

    /**
     * @notice Burns owner's shares (before expiry : PTs and YTs) and sends assets to receiver
     * @param assets The amount of assets to be received
     * @param receiver The address that will receive the assets
     * @param owner The owner of the shares (PTs and YTs)
     * @param maxShares The maximum shares allowed to be burnt
     * @return shares The actual amount of shares burnt for receiving the assets
     */
    function withdraw(
        uint256 assets,
        address receiver,
        address owner,
        uint256 maxShares
    ) external returns (uint256 shares);

    /**
     * @notice Burns owner's shares (before expiry : PTs and YTs) and sends IBTs to receiver
     * @param ibts The amount of IBT to be received
     * @param receiver The address that will receive the IBTs
     * @param owner The owner of the shares (PTs and YTs)
     * @return shares The actual amount of shares burnt for receiving the IBTs
     */
    function withdrawIBT(
        uint256 ibts,
        address receiver,
        address owner
    ) external returns (uint256 shares);

    /**
     * @notice Burns owner's shares (before expiry : PTs and YTs) and sends IBTs to receiver
     * @param ibts The amount of IBT to be received
     * @param receiver The address that will receive the IBTs
     * @param owner The owner of the shares (PTs and YTs)
     * @param maxShares The maximum shares allowed to be burnt
     * @return shares The actual amount of shares burnt for receiving the IBTs
     */
    function withdrawIBT(
        uint256 ibts,
        address receiver,
        address owner,
        uint256 maxShares
    ) external returns (uint256 shares);

    /**
     * @notice Updates _user's yield since last update
     * @param _user The user whose yield will be updated
     * @return updatedUserYieldInIBT The unclaimed yield of the user in IBT (not just the updated yield)
     */
    function updateYield(address _user) external returns (uint256 updatedUserYieldInIBT);

    /**
     * @notice Claims caller's unclaimed yield in asset
     * @param _receiver The receiver of yield
     * @param _minAssets The minimum amount of assets that should be received
     * @return yieldInAsset The amount of yield claimed in asset
     */
    function claimYield(
        address _receiver,
        uint256 _minAssets
    ) external returns (uint256 yieldInAsset);

    /**
     * @notice Claims caller's unclaimed yield in IBT
     * @param _receiver The receiver of yield
     * @param _minIBT The minimum amount of IBT that should be received
     * @return yieldInIBT The amount of yield claimed in IBT
     */
    function claimYieldInIBT(
        address _receiver,
        uint256 _minIBT
    ) external returns (uint256 yieldInIBT);

    /**
     * @notice Claims the collected ibt fees and redeems them to the fee collector
     * @param _minAssets The minimum amount of assets that should be received
     * @return assets The amount of assets sent to the fee collector
     */
    function claimFees(uint256 _minAssets) external returns (uint256 assets);

    /**
     * @notice Updates yield of both sender and receiver of YTs
     * @param _from the sender of YTs
     * @param _to the receiver of YTs
     */
    function beforeYtTransfer(address _from, address _to) external;

    /**
     * Call the claimRewards function of the rewards contract
     * @param data The optional data to be passed to the rewards contract
     */
    function claimRewards(bytes memory data) external;

    /* SETTERS
     *****************************************************************************************************************/

    /**
     * @notice Stores PT and IBT rates at expiry. Ideally, it should be called the day of expiry
     */
    function storeRatesAtExpiry() external;

    /** Set a new Rewards Proxy
     * @param _rewardsProxy The address of the new reward proxy
     */
    function setRewardsProxy(address _rewardsProxy) external;

    /* GETTERS
     *****************************************************************************************************************/

    /**
     * @notice Returns the amount of shares minted for the theorical deposited amount of assets
     * @param assets The amount of assets deposited
     * @return The amount of shares minted
     */
    function previewDeposit(uint256 assets) external view returns (uint256);

    /**
     * @notice Returns the amount of shares minted for the theorical deposited amount of IBT
     * @param ibts The amount of IBT deposited
     * @return The amount of shares minted
     */
    function previewDepositIBT(uint256 ibts) external view returns (uint256);

    /**
     * @notice Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     * @param receiver The receiver of the shares
     * @return The maximum amount of assets that can be deposited
     */
    function maxDeposit(address receiver) external view returns (uint256);

    /**
     * @notice Returns the theorical amount of shares that need to be burnt to receive assets of underlying
     * @param assets The amount of assets to receive
     * @return The amount of shares burnt
     */
    function previewWithdraw(uint256 assets) external view returns (uint256);

    /**
     * @notice Returns the theorical amount of shares that need to be burnt to receive amount of IBT
     * @param ibts The amount of IBT to receive
     * @return The amount of shares burnt
     */
    function previewWithdrawIBT(uint256 ibts) external view returns (uint256);

    /**
     * @notice Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     * @param owner The owner of the Vault shares
     * @return The maximum amount of assets that can be withdrawn
     */
    function maxWithdraw(address owner) external view returns (uint256);

    /**
     * @notice Returns the maximum amount of the IBT that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     * @param owner The owner of the Vault shares
     * @return The maximum amount of IBT that can be withdrawn
     */
    function maxWithdrawIBT(address owner) external view returns (uint256);

    /**
     * @notice Returns the amount of assets received for the theorical amount of burnt shares
     * @param shares The amount of shares to burn
     * @return The amount of assets received
     */
    function previewRedeem(uint256 shares) external view returns (uint256);

    /**
     * @notice Returns the amount of IBT received for the theorical amount of burnt shares
     * @param shares The amount of shares to burn
     * @return The amount of IBT received
     */
    function previewRedeemForIBT(uint256 shares) external view returns (uint256);

    /**
     * @notice Returns the maximum amount of Vault shares that can be redeemed by the owner
     * @notice This function behaves differently before and after expiry. Before expiry an equal amount of PT and YT
     * needs to be burnt, while after expiry only PTs are burnt.
     * @param owner The owner of the shares
     * @return The maximum amount of shares that can be redeemed
     */
    function maxRedeem(address owner) external view returns (uint256);

    /**
     * Returns the total amount of the underlying asset that is owned by the Vault in the form of IBT.
     */
    function totalAssets() external view returns (uint256);

    /**
     * @notice Converts an underlying amount in principal. Equivalent to ERC-4626's convertToShares method.
     * @param underlyingAmount The amount of underlying (or assets) to convert
     * @return The resulting amount of principal (or shares)
     */
    function convertToPrincipal(uint256 underlyingAmount) external view returns (uint256);

    /**
     * @notice Converts a principal amount in underlying. Equivalent to ERC-4626's convertToAssets method.
     * @param principalAmount The amount of principal (or shares) to convert
     * @return The resulting amount of underlying (or assets)
     */
    function convertToUnderlying(uint256 principalAmount) external view returns (uint256);

    /**
     * @notice Returns whether or not the contract is paused.
     * @return true if the contract is paused, and false otherwise
     */
    function paused() external view returns (bool);

    /**
     * @notice Returns the unix timestamp (uint256) at which the PT contract expires
     * @return The unix timestamp (uint256) when PTs become redeemable
     */
    function maturity() external view returns (uint256);

    /**
     * @notice Returns the duration of the PT contract
     * @return The duration (in s) to expiry/maturity of the PT contract
     */
    function getDuration() external view returns (uint256);

    /**
     * @notice Returns the address of the underlying token (or asset). Equivalent to ERC-4626's asset method.
     * @return The address of the underlying token (or asset)
     */
    function underlying() external view returns (address);

    /**
     * @notice Returns the IBT address of the PT contract
     * @return ibt The address of the IBT
     */
    function getIBT() external view returns (address ibt);

    /**
     * @notice Returns the yt address of the PT contract
     * @return yt The address of the yt
     */
    function getYT() external view returns (address yt);

    /**
     * @notice Returns the current ibtRate
     * @return The current ibtRate
     */
    function getIBTRate() external view returns (uint256);

    /**
     * @notice Returns the current ptRate
     * @return The current ptRate
     */
    function getPTRate() external view returns (uint256);

    /**
     * @notice Returns 1 unit of IBT
     * @return The IBT unit
     */
    function getIBTUnit() external view returns (uint256);

    /**
     * @notice Get the unclaimed fees in IBT
     * @return The unclaimed fees in IBT
     */
    function getUnclaimedFeesInIBT() external view returns (uint256);

    /**
     * @notice Get the total collected fees in IBT (claimed and unclaimed)
     * @return The total fees in IBT
     */
    function getTotalFeesInIBT() external view returns (uint256);

    /**
     * @notice Get the tokenization fee of the PT
     * @return The tokenization fee
     */
    function getTokenizationFee() external view returns (uint256);

    /**
     * @notice Get the current IBT yield of the user
     * @param _user The address of the user to get the current yield from
     * @return The yield of the user in IBT
     */
    function getCurrentYieldOfUserInIBT(address _user) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.4;

interface IStableSwapNG {
    function A() external view returns (uint256);
    function A_precise() external view returns (uint256);
    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function D_ma_time() external view returns (uint256);
    function D_oracle() external view returns (uint256);
    function N_COINS() external view returns (uint256);
    function add_liquidity(
        uint256[] memory _amounts,
        uint256 _min_mint_amount,
        address _receiver
    ) external returns (uint256);
    function admin_balances(uint256 arg0) external view returns (uint256);
    function admin_fee() external view returns (uint256);
    function allowance(address arg0, address arg1) external view returns (uint256);
    function approve(address _spender, uint256 _value) external returns (bool);
    function balanceOf(address arg0) external view returns (uint256);
    function balances(uint256 i) external view returns (uint256);
    function calc_token_amount(
        uint256[] memory _amounts,
        bool _is_deposit
    ) external view returns (uint256);
    function calc_withdraw_one_coin(uint256 _burn_amount, int128 i) external view returns (uint256);
    function coins(uint256 arg0) external view returns (address);
    function decimals() external view returns (uint8);
    function dynamic_fee(int128 i, int128 j) external view returns (uint256);
    function ema_price(uint256 i) external view returns (uint256);
    function exchange(int128 i, int128 j, uint256 _dx, uint256 _min_dy) external returns (uint256);
    function exchange(
        int128 i,
        int128 j,
        uint256 _dx,
        uint256 _min_dy,
        address _receiver
    ) external returns (uint256);
    function exchange_received(
        int128 i,
        int128 j,
        uint256 _dx,
        uint256 _min_dy
    ) external returns (uint256);
    function exchange_received(
        int128 i,
        int128 j,
        uint256 _dx,
        uint256 _min_dy,
        address _receiver
    ) external returns (uint256);
    function fee() external view returns (uint256);
    function future_A() external view returns (uint256);
    function future_A_time() external view returns (uint256);
    function get_balances() external view returns (uint256[] memory);
    function get_dx(int128 i, int128 j, uint256 dy) external view returns (uint256);
    function get_dy(int128 i, int128 j, uint256 dx) external view returns (uint256);
    function get_p(uint256 i) external view returns (uint256);
    function get_virtual_price() external view returns (uint256);
    function initial_A() external view returns (uint256);
    function initial_A_time() external view returns (uint256);
    function last_price(uint256 i) external view returns (uint256);
    function ma_exp_time() external view returns (uint256);
    function ma_last_time() external view returns (uint256);
    function name() external view returns (string memory);
    function nonces(address arg0) external view returns (uint256);
    function offpeg_fee_multiplier() external view returns (uint256);
    function permit(
        address _owner,
        address _spender,
        uint256 _value,
        uint256 _deadline,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external returns (bool);
    function price_oracle(uint256 i) external view returns (uint256);
    function ramp_A(uint256 _future_A, uint256 _future_time) external;
    function remove_liquidity(
        uint256 _burn_amount,
        uint256[] memory _min_amounts
    ) external returns (uint256[] memory);
    function remove_liquidity(
        uint256 _burn_amount,
        uint256[] memory _min_amounts,
        address _receiver
    ) external returns (uint256[] memory);
    function remove_liquidity(
        uint256 _burn_amount,
        uint256[] memory _min_amounts,
        address _receiver,
        bool _claim_admin_fees
    ) external returns (uint256[] memory);
    function remove_liquidity_imbalance(
        uint256[] memory _amounts,
        uint256 _max_burn_amount
    ) external returns (uint256);
    function remove_liquidity_imbalance(
        uint256[] memory _amounts,
        uint256 _max_burn_amount,
        address _receiver
    ) external returns (uint256);
    function remove_liquidity_one_coin(
        uint256 _burn_amount,
        int128 i,
        uint256 _min_received
    ) external returns (uint256);
    function remove_liquidity_one_coin(
        uint256 _burn_amount,
        int128 i,
        uint256 _min_received,
        address _receiver
    ) external returns (uint256);
    function salt() external view returns (bytes32);
    function set_ma_exp_time(uint256 _ma_exp_time, uint256 _D_ma_time) external;
    function set_new_fee(uint256 _new_fee, uint256 _new_offpeg_fee_multiplier) external;
    function stop_ramp_A() external;
    function stored_rates() external view returns (uint256[] memory);
    function symbol() external view returns (string memory);
    function totalSupply() external view returns (uint256);
    function transfer(address _to, uint256 _value) external returns (bool);
    function transferFrom(address _from, address _to, uint256 _value) external returns (bool);
    function version() external view returns (string memory);
    function withdraw_admin_fees() external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import {Math} from "openzeppelin-math/Math.sol";
import {IERC20} from "openzeppelin-contracts/interfaces/IERC20.sol";
import {IERC4626} from "openzeppelin-contracts/interfaces/IERC4626.sol";
import {ICurveNGPool} from "../interfaces/ICurveNGPool.sol";
import {IStableSwapNG} from "../interfaces/IStableSwapNG.sol";
import {IPrincipalToken} from "../interfaces/IPrincipalToken.sol";

/**
 * @dev Utilities for computing prices of Spectra PTs, YTs and LP tokens in Curve CryptoSwap pools.
 */

library CurveOracleLib {
    using Math for uint256;

    error PoolLiquidityError();

    uint256 public constant CURVE_UNIT = 1e18;

    /**
     * This function returns the TWAP rate PT/Asset on a Curve Cryptoswap pool, but takes into account the current rate of IBT
     * This accounts for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param pool Address of the Curve Pool to get rate from
     * @return PT/Underlying exchange rate
     */
    function getPTToAssetRate(address pool) internal view returns (uint256) {
        uint256 ptToIBTRate = getPTToIBTRate(pool);
        IERC4626 ibt = IERC4626(ICurveNGPool(pool).coins(0));
        return ibt.previewRedeem(ptToIBTRate);
    }

    /**
     * This function returns the TWAP rate PT/Asset on a Curve StableSwap NG pool, but takes into account the current rate of IBT
     * This accounts for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param pool Address of the Curve Pool to get rate from
     * @return PT/Underlying exchange rate
     */
    function getPTToAssetRateSNG(address pool) public view returns (uint256) {
        uint256 ptToIBTRate = getPTToIBTRateSNG(pool);
        IERC4626 ibt = IERC4626(ICurveNGPool(pool).coins(0));
        return ibt.previewRedeem(ptToIBTRate);
    }

    /**
     * @dev This function returns the TWAP rate PT/IBT on a Curve Cryptoswap pool
     * This accounts for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param pool Address of the Curve Pool to get rate from
     * @return PT/IBT exchange rate
     */
    function getPTToIBTRate(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(ICurveNGPool(pool).coins(1));
        uint256 maturity = pt.maturity();
        if (maturity <= block.timestamp) {
            return pt.previewRedeemForIBT(pt.getIBTUnit());
        } else {
            return pt.getIBTUnit().mulDiv(ICurveNGPool(pool).price_oracle(), CURVE_UNIT);
        }
    }

    /**
     * @dev This function returns the TWAP rate PT/IBT on a Curve StableSwap NG pool
     * This accounts for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param pool Address of the Curve Pool to get rate from
     * @return PT/IBT exchange rate
     */
    function getPTToIBTRateSNG(address pool) public view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(ICurveNGPool(pool).coins(1));
        uint256 maturity = pt.maturity();
        if (maturity <= block.timestamp) {
            return pt.previewRedeemForIBT(pt.getIBTUnit());
        } else {
            uint256[] memory storedRates = IStableSwapNG(pool).stored_rates();
            return
                pt.getIBTUnit().mulDiv(storedRates[1], storedRates[0]).mulDiv(
                    IStableSwapNG(pool).price_oracle(0),
                    CURVE_UNIT
                );
        }
    }

    /**
     * This function returns the TWAP rate YT/Asset on a Curve Cryptoswap pool
     * @param pool Curve Pool to get rate from
     * @return YT/Underlying exchange rate
     */
    function getYTToAssetRate(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(ICurveNGPool(pool).coins(1));
        uint256 ptToAssetRateCore = pt.previewRedeem(pt.getIBTUnit());
        uint256 ptToAssetRateOracle = getPTToAssetRate(pool);
        if (ptToAssetRateOracle > ptToAssetRateCore) {
            revert PoolLiquidityError();
        }
        return (ptToAssetRateCore - ptToAssetRateOracle);
    }

    /**
     * This function returns the TWAP rate YT/Asset on a Curve StableSwap NG pool
     * @param pool Curve Pool to get rate from
     * @return YT/Underlying exchange rate
     */
    function getYTToAssetRateSNG(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(IStableSwapNG(pool).coins(1));
        uint256 ptToAssetRateCore = pt.previewRedeem(pt.getIBTUnit());
        uint256 ptToAssetRateOracle = getPTToAssetRateSNG(pool);
        if (ptToAssetRateOracle > ptToAssetRateCore) {
            revert PoolLiquidityError();
        }
        return (ptToAssetRateCore - ptToAssetRateOracle);
    }

    /**
     * @dev This function returns the TWAP rate YT/IBT on a Curve Cryptoswap pool
     * @param pool Curve Pool to get rate from
     * @return YT/IBT exchange rate
     */
    function getYTToIBTRate(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(ICurveNGPool(pool).coins(1));
        uint256 ptToIBTRateCore = pt.previewRedeemForIBT(pt.getIBTUnit());
        uint256 ptToIBTRateOracle = getPTToIBTRate(pool);
        if (ptToIBTRateOracle > ptToIBTRateCore) {
            revert PoolLiquidityError();
        }
        return ptToIBTRateCore - ptToIBTRateOracle;
    }

    /**
     * @dev This function returns the TWAP rate YT/IBT on a Curve StableSwap NG pool
     * @param pool Curve Pool to get rate from
     * @return YT/IBT exchange rate
     */
    function getYTToIBTRateSNG(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(IStableSwapNG(pool).coins(1));
        uint256 ptToIBTRateCore = pt.previewRedeemForIBT(pt.getIBTUnit());
        uint256 ptToIBTRateOracle = getPTToIBTRateSNG(pool);
        if (ptToIBTRateOracle > ptToIBTRateCore) {
            revert PoolLiquidityError();
        }
        return ptToIBTRateCore - ptToIBTRateOracle;
    }

    /**
     * This function returns the TWAP rate LP/Asset on a Curve Cryptoswap , and takes into account the current rate of IBT
     * @param pool Address of the Curve Pool to get rate from
     * @return LP/Underlying exchange rate
     */
    function getLPTToAssetRate(address pool) internal view returns (uint256) {
        uint256 lptToIBTRate = getLPTToIBTRate(pool);
        IERC4626 ibt = IERC4626(ICurveNGPool(pool).coins(0));
        return ibt.previewRedeem(lptToIBTRate);
    }

    /**
     * @dev This function returns the TWAP rate LP/IBT on a Curve CryptoSwap pool
     * @param pool Address of the Curve Pool to get rate from
     * @return LP/IBT exchange rate
     */
    function getLPTToIBTRate(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(ICurveNGPool(pool).coins(1));
        uint256 maturity = pt.maturity();
        uint256 balIBT = ICurveNGPool(pool).balances(0);
        uint256 balPT = ICurveNGPool(pool).balances(1);
        uint256 supplyLPT = IERC20(pool).totalSupply();
        if (maturity <= block.timestamp) {
            return
                pt.previewRedeemForIBT(balPT.mulDiv(CURVE_UNIT, supplyLPT)) +
                balIBT.mulDiv(CURVE_UNIT, supplyLPT);
        } else {
            uint256 ptToIBTRate = getPTToIBTRate(pool);
            return
                ((balPT.mulDiv(ptToIBTRate, pt.getIBTUnit())) + balIBT).mulDiv(
                    CURVE_UNIT,
                    supplyLPT
                );
        }
    }

    /**
     * This function returns the TWAP rate LP/Asset on a Curve StableSwap NG pool, and takes into account the current rate of IBT
     * @param pool Address of the Curve Pool to get rate from
     * @return LP/Underlying exchange rate
     */
    function getLPTToAssetRateSNG(address pool) internal view returns (uint256) {
        uint256 lptToIBTRate = getLPTToIBTRateSNG(pool);
        IERC4626 ibt = IERC4626(IStableSwapNG(pool).coins(0));
        return ibt.previewRedeem(lptToIBTRate);
    }

    /**
     * @dev This function returns the TWAP rate LP/IBT on a Curve StableSwap NG pool
     * @param pool Address of the Curve Pool to get rate from
     * @return LP/IBT exchange rate
     */
    function getLPTToIBTRateSNG(address pool) internal view returns (uint256) {
        IPrincipalToken pt = IPrincipalToken(IStableSwapNG(pool).coins(1));
        uint256 maturity = pt.maturity();
        uint256 balIBT = IStableSwapNG(pool).balances(0);
        uint256 balPT = IStableSwapNG(pool).balances(1);
        uint256 supplyLPT = IERC20(pool).totalSupply();
        if (maturity <= block.timestamp) {
            return
                pt.previewRedeemForIBT(balPT.mulDiv(CURVE_UNIT, supplyLPT)) +
                balIBT.mulDiv(CURVE_UNIT, supplyLPT);
        } else {
            uint256 ptToIBTRate = getPTToIBTRateSNG(pool);
            return
                ((balPT.mulDiv(ptToIBTRate, pt.getIBTUnit())) + balIBT).mulDiv(
                    CURVE_UNIT,
                    supplyLPT
                );
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {CurveOracleLib} from "src/libraries/CurveOracleLib.sol";
import {BaseOracleCurveLPT} from "src/spectra-oracles/oracles/BaseOracleCurveLPT.sol";
import {Initializable} from "openzeppelin-contracts-upgradeable/proxy/utils/Initializable.sol";
/**
 * @title BaseFeedCurveLPTAsset contract
 * @author Spectra Finance
 * @notice Base contract to implement the AggregatorV3Interface feed for the LPT price expressed in asset
 */
abstract contract BaseFeedCurveLPTAssetSNG is BaseOracleCurveLPT {
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializes the oracle
     * @param _pt The principal token address
     * @param _pool The pool address
     */
    function __BaseFeedCurveLPTAssetSNG_init(address _pt, address _pool) internal onlyInitializing {
        super.__BaseOracleCurveLPT_init(_pt, _pool);
    }

    /* INTERNAL
     *****************************************************************************************************************/

    function _LPTPrice() internal view override returns (uint256) {
        return CurveOracleLib.getLPTToAssetRateSNG(pool);
    }

    /* AGGREGATORV3INTERFACE
     *****************************************************************************************************************/

    function decimals() external view override returns (uint8) {
        return IERC20Metadata(asset).decimals();
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import {Initializable} from "openzeppelin-contracts-upgradeable/proxy/utils/Initializable.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {IPrincipalToken} from "src/interfaces/IPrincipalToken.sol";
import {AggregatorV3Interface} from "src/interfaces/AggregatorV3Interface.sol";

/**
 * @title BaseOracle contract
 * @author Spectra Finance
 * @notice A base oracle implementation
 */
abstract contract BaseOracle is AggregatorV3Interface, Initializable {
    address public pool;
    address public pt;
    uint256 public maturity;
    address public asset;
    address public ibt;

    constructor() {
        _disableInitializers();
    }

    /**
     * @notice First function to be called after deployment
     * @param _pt The principal token address
     * @param _pool The pool address
     */
    function __BaseOracle_init(address _pt, address _pool) internal onlyInitializing {
        pool = _pool;
        pt = _pt;
        maturity = IPrincipalToken(_pt).maturity();
        asset = IPrincipalToken(_pt).underlying();
        ibt = IPrincipalToken(_pt).getIBT();
    }

    /* AggregatorV3Interface
     *****************************************************************************************************************/

    /** @dev See {AggregatorV3Interface-version}. */
    function version() external pure virtual returns (uint256) {
        return 1;
    }

    /** @dev See {AggregatorV3Interface-decimals}. */
    function decimals() external view virtual returns (uint8);

    /** @dev See {AggregatorV3Interface-getQuoteAmount}. */
    function _getQuoteAmount() internal view virtual returns (uint256);

    /** @dev See {AggregatorV3Interface-getRoundData}. */
    function getRoundData(
        uint80
    )
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (0, int256(_getQuoteAmount()), 0, 0, 0);
    }

    /** @dev See {AggregatorV3Interface-latestRoundData}. */
    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (0, int256(_getQuoteAmount()), 0, 0, 0);
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import {BaseOracle} from "src/spectra-oracles/oracles/BaseOracle.sol";
import {Initializable} from "openzeppelin-contracts-upgradeable/proxy/utils/Initializable.sol";
/**
 * @title BaseOracleCurveLPT contract
 * @author Spectra Finance
 * @notice A base oracle implementation for Curve LP Token
 */
abstract contract BaseOracleCurveLPT is BaseOracle {
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializes the oracle
     * @param _pt The principal token address
     * @param _pool The pool address
     */
    function __BaseOracleCurveLPT_init(address _pt, address _pool) internal onlyInitializing {
        super.__BaseOracle_init(_pt, _pool);
    }

    /* INTERNAL
     *****************************************************************************************************************/

    /**
     * @dev Returns the LPT Price of the pool in asset or IBT
     */
    function _getQuoteAmount() internal view override returns (uint256) {
        return _LPTPrice();
    }

    function _LPTPrice() internal view virtual returns (uint256);
}

{
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "appendCBOR": true,
    "bytecodeHash": "ipfs",
    "useLiteralContent": false
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/",
    "openzeppelin-erc20-basic/=lib/openzeppelin-contracts/contracts/token/ERC20/",
    "openzeppelin-erc20-extensions/=lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/extensions/",
    "openzeppelin-erc20/=lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/",
    "openzeppelin-math/=lib/openzeppelin-contracts/contracts/utils/math/",
    "openzeppelin-proxy/=lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/",
    "openzeppelin-utils/=lib/openzeppelin-contracts/contracts/utils/",
    "config/=lib/spectra-contracts-configs/script/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "DiamondRouter/=lib/DiamondRouter/",
    "halmos-cheatcodes/=lib/DiamondRouter/lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "solidity-stringutils/=lib/DiamondRouter/lib/solidity-stringutils/",
    "spectra-contracts-configs/=lib/spectra-contracts-configs/"
  ],
  "viaIR": false
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"InvalidInitialization","type":"error"},{"inputs":[],"name":"MathOverflowedMulDiv","type":"error"},{"inputs":[],"name":"NotInitializing","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint64","name":"version","type":"uint64"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"asset","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint80","name":"","type":"uint80"}],"name":"getRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ibt","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_pt","type":"address"},{"internalType":"address","name":"_pool","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maturity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pool","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pt","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"}]

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