EOPendlePTFeedLinearDiscount

{{
  "language": "Solidity",
  "sources": {
    "src/EOPendlePTFeedLinearDiscount.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import { IPendlePT } from "./interfaces/pendle/IPendlePT.sol";
import { EOBase } from "./EOBase.sol";
import { Initializable } from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import { IEOPendlePTFeedLinearDiscount } from "./interfaces/IEOPendlePTFeedLinearDiscount.sol";

/**
 * @title EOPendlePTFeedLinearDiscount
 * @author EO
 * @notice Pendle PT linear discount feed oracle.
 */
contract EOPendlePTFeedLinearDiscount is IEOPendlePTFeedLinearDiscount, EOBase, Initializable {
    /**
     * @notice The number of seconds in a year.
     */
    uint256 private constant _SECONDS_PER_YEAR = 365 days;

    /**
     * @notice The constant value of 1.
     */
    uint256 private constant _ONE = 1e18;

    /**
     * @notice The decimals precision of the price feed.
     */
    // solhint-disable-next-line const-name-snakecase
    uint8 public constant decimals = 18;

    /**
     * @notice The address of the Pendle PT token
     */
    address public ptToken;

    /**
     * @notice The maturity of the discount.
     */
    uint256 public maturity;

    /**
     * @notice The base discount per year, 100% = 1e18
     */
    uint256 public baseDiscountPerYear;

    /**
     * @notice The description of the price feed.
     */
    string public description;

    /**
     * @notice The gap for the upgradeable contract.
     */
    uint256[50] private _gap;

    /**
     * @custom:oz-upgrades-unsafe-allow constructor
     */
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initialize the price feed.
     * @param ptToken_ The address of the PT token.
     * @param description_ The description of the price feed.
     * @param baseDiscountPerYear_ The base discount per year.
     */
    function initialize(
        address ptToken_,
        string memory description_,
        uint256 baseDiscountPerYear_
    )
        external
        initializer
    {
        if (ptToken_ == address(0)) revert PTTokenAddressIsZero();
        if (baseDiscountPerYear_ > _ONE) revert BaseDiscountPerYearIsTooHigh();

        ptToken = ptToken_;
        description = description_;
        baseDiscountPerYear = baseDiscountPerYear_;
        maturity = IPendlePT(ptToken_).expiry();
    }

    /**
     * @notice Returns latest round data
     * @dev Returns zero for roundId, startedAt and answeredInRound.
     * @return roundId The round id, returns 0
     * @return answer The answer, returns the rate according to the Linear Discount
     * @return startedAt The started at, returns 0
     * @return updatedAt The updated at, returns current block timestamp
     * @return answeredInRound The answered in round, returns 0
     */
    function latestRoundData() public view override returns (uint80, int256, uint256, uint256, uint80) {
        uint256 timeLeft = (maturity > block.timestamp) ? maturity - block.timestamp : 0;
        uint256 discount = getDiscount(timeLeft);

        if (discount > _ONE) revert DiscountOverflow();

        return (0, int256(_ONE - discount), 0, block.timestamp, 0);
    }

    /**
     * @notice Get the discount for a given time left.
     * @param timeLeft The time left in seconds.
     * @return The discount.
     */
    function getDiscount(uint256 timeLeft) public view returns (uint256) {
        return (timeLeft * baseDiscountPerYear) / _SECONDS_PER_YEAR;
    }
}
"
    },
    "src/interfaces/pendle/IPendlePT.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

interface IPendlePT {
    function expiry() external view returns (uint256);
}
"
    },
    "src/EOBase.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import { AggregatorV2V3Interface } from "./interfaces/AggregatorV2V3Interface.sol";

/**
 * @title EOBase
 * @author EO
 * @notice Base contract for EO contracts
 */
abstract contract EOBase is AggregatorV2V3Interface {
    /**
     * @notice Returns the latest answer
     * @return The latest answer
     */
    function latestAnswer() external view returns (int256) {
        (, int256 answer,,,) = latestRoundData();
        return answer;
    }

    /**
     * @notice Returns the latest update timestamp
     * @return The latest update timestamp
     */
    function latestTimestamp() external view returns (uint256) {
        (,,, uint256 updatedAt,) = latestRoundData();
        return updatedAt;
    }

    /**
     * @notice Returns the latest round ID
     * @return The latest round ID
     */
    function latestRound() external view returns (uint256) {
        (uint80 roundId,,,,) = latestRoundData();
        return uint256(roundId);
    }

    /**
     * @notice Returns the answer of the latest round
     * @param roundId The round ID (ignored)
     * @return The answer of the latest round
     */
    function getAnswer(uint256 roundId) external view returns (int256) {
        (, int256 answer,,,) = getRoundData(uint80(roundId));
        return answer;
    }

    /**
     * @notice Returns the update timestamp of the latest round
     * @param roundId The round ID (ignored)
     * @return The update timestamp of the latest round
     */
    function getTimestamp(uint256 roundId) external view returns (uint256) {
        (,,, uint256 updatedAt,) = getRoundData(uint80(roundId));
        return updatedAt;
    }

    /**
     * @notice Returns the minimum updated at, default to updatedAt in latestRoundData
     * @dev This method is valuable for complex feeds, where other feeds rates are involved into computation
     * and since updatedAt in latestRoundData is the latest updatedAt among the feeds, it may not reflect the data
     * freshness, so this method shows the earliest updatedAt among the feeds, and reflects the data freshness
     * @return The minimum updated at among the feeds used to compute the final rate
     */
    function minUpdatedAt() external view virtual returns (uint256) {
        (,,, uint256 updatedAt,) = latestRoundData();
        return updatedAt;
    }

    /**
     * @notice Returns the latest round data
     * @return roundId The latest round ID, optional
     * @return answer The latest answer
     * @return startedAt The timestamp when the round started, optional
     * @return updatedAt The timestamp of the latest update
     * @return answeredInRound The round ID in which the answer was computed, optional
     */
    function latestRoundData()
        public
        view
        virtual
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

    /**
     * @notice Returns the latest round data
     * @param roundId The round ID, is ignored
     * @return roundId The round ID of   the latest round data
     * @return answer The answer of the latest round data
     * @return startedAt The started at of the latest round data
     * @return updatedAt The updated at of the latest round data
     * @return answeredInRound The round ID in which the answer was computed of the latest round data
     */
    function getRoundData(uint80)
        public
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)
    {
        return latestRoundData();
    }
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}
"
    },
    "src/interfaces/IEOPendlePTFeedLinearDiscount.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

/**
 * @title IEOPendlePTFeedLinearDiscount
 * @author EO
 * @notice Interface for Pendle PT linear discount feed oracle.
 */
interface IEOPendlePTFeedLinearDiscount {
    /**
     * @notice Error thrown when the PT token address is zero.
     */
    error PTTokenAddressIsZero();

    /**
     * @notice Error thrown when the base discount per year is less than 1e18.
     */
    error BaseDiscountPerYearIsTooHigh();

    /**
     * @notice Error thrown when the discount overflows.
     */
    error DiscountOverflow();

    function initialize(address ptToken_, string memory description_, uint256 baseDiscountPerYear_) external;
}
"
    },
    "src/interfaces/AggregatorV2V3Interface.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import { MinimalAggregatorV3Interface } from "./MinimalAggregatorV3Interface.sol";

/**
 * @title AggregatorV2V3Interface
 * @author EO
 * @notice Interface for the AggregatorV2V3 contract
 */
interface AggregatorV2V3Interface is MinimalAggregatorV3Interface {
    /**
     * @notice Returns the latest answer
     * @return The latest answer
     */
    function latestAnswer() external view returns (int256);

    /**
     * @notice Returns the latest update timestamp
     * @return The latest update timestamp
     */
    function latestTimestamp() external view returns (uint256);

    /**
     * @notice Returns the latest round ID
     * @return The latest round ID
     */
    function latestRound() external view returns (uint256);

    /**
     * @notice Returns the answer of the latest round
     * @param roundId The round ID (ignored)
     * @return The answer of the latest round
     */
    function getAnswer(uint256 roundId) external view returns (int256);

    /**
     * @notice Returns the update timestamp of the latest round
     * @param roundId The round ID (ignored)
     * @return The update timestamp of the latest round
     */
    function getTimestamp(uint256 roundId) external view returns (uint256);

    /**
     * @notice Returns the latest round data
     * @return roundId The latest round ID, optional
     * @return answer The latest answer
     * @return startedAt The timestamp when the round started, optional
     * @return updatedAt The timestamp of the latest update
     * @return answeredInRound The round ID in which the answer was computed, optional
     */
    function latestRoundData()
        external
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

    /**
     * @notice Returns the latest round data
     * @param roundId The round ID, is ignored
     * @return roundId The round ID of   the latest round data
     * @return answer The answer of the latest round data
     * @return startedAt The started at of the latest round data
     * @return updatedAt The updated at of the latest round data
     * @return answeredInRound The round ID in which the answer was computed of the latest round data
     */
    function getRoundData(uint80)
        external
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}
"
    },
    "src/interfaces/MinimalAggregatorV3Interface.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

/**
 * @title MinimalAggregatorV3Interface
 * @author EO
 * @notice Interface for price feed oracle
 */
interface MinimalAggregatorV3Interface {
    /**
     * @notice Returns feed decimals
     * @return The decimals of the feed.
     */
    function decimals() external view returns (uint8);

    /**
     * @notice Returns the latest round data
     * @return roundId The latest round ID, optional
     * @return answer The latest answer
     * @return startedAt The timestamp when the round started, optional
     * @return updatedAt The timestamp of the latest update
     * @return answeredInRound The round ID in which the answer was computed, optional
     */
    function latestRoundData()
        external
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}
"
    }
  },
  "settings": {
    "remappings": [
      "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
      "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
      "@openzeppelin-foundry-upgrades/=lib/openzeppelin-foundry-upgrades/src/",
      "@maverick/v2-common/=lib/maverickprotocol-v2-common/",
      "forge-std/=lib/forge-std/src/",
      "@eoracle/=lib/target-contracts/src/",
      "@spectra-core/=lib/spectra-core/",
      "lib/spectra-core/:openzeppelin-contracts-upgradeable/=lib/spectra-core/lib/openzeppelin-contracts-upgradeable/contracts/",
      "lib/spectra-core/:openzeppelin-contracts/=lib/spectra-core/lib/openzeppelin-contracts/contracts/",
      "ds-test/=lib/spectra-core/lib/forge-std/lib/ds-test/src/",
      "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
      "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
      "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
      "openzeppelin-contracts/=lib/openzeppelin-contracts/",
      "openzeppelin-erc20-basic/=lib/spectra-core/lib/openzeppelin-contracts/contracts/token/ERC20/",
      "openzeppelin-erc20-extensions/=lib/spectra-core/lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/extensions/",
      "openzeppelin-erc20/=lib/spectra-core/lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/",
      "openzeppelin-foundry-upgrades/=lib/openzeppelin-foundry-upgrades/src/",
      "openzeppelin-math/=lib/spectra-core/lib/openzeppelin-contracts/contracts/utils/math/",
      "openzeppelin-proxy/=lib/spectra-core/lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/",
      "openzeppelin-utils/=lib/spectra-core/lib/openzeppelin-contracts/contracts/utils/",
      "spectra-core/=lib/spectra-core/"
    ],
    "optimizer": {
      "enabled": true,
      "runs": 100
    },
    "metadata": {
      "useLiteralContent": false,
      "bytecodeHash": "none",
      "appendCBOR": true
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "evmVersion": "cancun",
    "viaIR": true
  }
}}